We’re pretty sure that the last time a tsunami hit the northwest coast of the U.S. was in 1964, shortly after a major earthquake struck Alaska; far as we know, it damaged some places on the Oregon coast, including Cannon Beach.

Saturday morning (Feb. 27th), imagine our surprise when we saw an “Advisory” posted in our Weather Widget in the right sidebar. Clicking on it revealed that yes, a “Tsunami Advisory” had been issued for the northern and central Washington coast after a huge, 8.8 quake hit Chile´.

We don’t think this is cause for panic in the Puget Sound region, but we wanted to share this info because, well, who knows – maybe a tsunami-based wave will hit the shorelines near Burien? Maybe not?

The advisory warns that, if indeed a tsunami wave makes it up the coast, takes a right turn through the Strait of Juan de Fuca, makes another right and heads down through the upper islands of Puget Sound…when (and if) it hits Pier 48 in Seattle it’s predicted to be .13 feet high, which, according to our rudimentary math skills, equals a measly 1.56 inches high.

According to this NOAA website, the predicted time for this wave to strike Seattle is 1641 PST – for us non-military types, that’s 4:41pm Saturday afternoon.

If you happen to have a video camera and a lot of free time this afternoon, why not hang out near one of Burien’s beaches around 4:30-5pm and see if you can videotape a 1.56 inch wave barreling in from the north? We’d love to post it – please email us if you do!

And if you know anyone who lives on the coast, or in Hawaii, please make sure they’re aware of this advisory, as it could be very serious in those areas.

According to the National Weather Service:

Persons in tsunami advisory areas should move out of the water… off the beach and out of harbors and marinas.

Tsunami advisories mean that a tsunami capable of producing strong currents or waves dangerous to persons in or very near water is imminent or expected. Significant widespread inundation is not expected for areas in an advisory. Tsunamis are a series of waves potentially dangerous several hours after initial arrival time. Estimated times of initial wave arrival for selected sites in the advisory are provided below.

Here’s the “Tsunami Advisory” language as posted at 9:18am:

Tsunami Advisory

Statement as of 9:18 AM PST on February 27, 2010

… A tsunami advisory remains in effect for the northern and central Washington coast…

A tsunami advisory remains in effect for the northern and central Washington coast.

There is no Tsunami Watch or warning in effect for the Washington coast. Repeat… there is no Tsunami Watch or warning in effect.

A powerful 8.8 magnitude earthquake occurred at 1034 PM PDT Friday near the central coast of chile. It has generated a tsunami wave… which is now spreading out across the Pacific Ocean.

The first tsunami waves are expected to reach the Washington coast between 250 PM and 310 PM PST this afternoon. The following are the
estimated arrival times of the first waves.

• Seaside or… … ..246 PM PST
• Westport WA… … .257 PM PST
• Neah Bay WA… … .307 PM PST

The largest tsunami waves are expected two hours after the first arrival.

The waves are not expected to be large enough to cause coastal flooding along the Washington coast. However… some coastal areas could experience dangerous currents and surges in harbors and bays. Forecast tsunami wave amplitudes follow.

• Long Beach WA… ..0.46 ft
• Westport… … … .0.78 ft
• Moclips… … … ..1.27 ft
• Neah Bay… … … .0.65 ft
• Port Angeles… … 0.33 ft
• Bellingham… … ..0.46 ft
• Everett… … … ..0.13 ft
• Seattle-pier 48… 0.13 ft

The minimum wave height for a tsunami advisory on the Washington coast is 6 inches or 15 centimeters.

The initial wave will not be the largest. Coastal residents are advised to stay out of the water… off the beach… and away from harbors and marinas. Wave heights and currents are amplified by irregular shoreline and are difficult to predict. The tsunami may not be visible among the common ocean surf… yet tide gages will likely report some fluctuations.

Mariners in water deeper than 600 feet should not be affected by a tsunami.

Repeat… no Tsunami Watch or warning is in effect for the northern and central Washington coast.

And just ‘cuz we found it and we love science, here’s a pretty cool simulation video of what might happen if a tsunami hit Elliott Bay:

UPDATE: 1:45pm PST: So far, no tsunami yet in Hawaii, but this type of rare event is considered and “inexact science.” Here’s a link to a website that’s broadcasting a live TV signal from Hawaii.

Also, here’s the live webcam feed from Burien’s Seahurst Park Beach, just in case; refresh this page to see the latest:

The National Weather Service issued an unusual Advisory Monday (Jan. 18th) – this one for a “minor tidal overflow” that will be in effect for Puget Sound Tuesday morning and possibly again Wednesday morning.

According to the report, “very high astronomical tides combined with lower than normal atmospheric pressures” as well as high winds may cause some flooding.

So, if you live near the shoreline and your street/yard/area has a tendency to flood, you might want to put out some sandbags just in case.

Here’s the actual advisory:

… Coastal Flood Advisory for minor tidal overflow is in effect for Puget Sound and the north interior from 5 am to 11 am PST Tuesday…

The National Weather Service in Seattle has issued a coastal Flood Advisory for minor tidal overflow from Puget Sound to the north interior… which is in effect from 5 am to 11 am PST Tuesday.

Minor tidal overflow may occur along some of the shorelines and nearby low-lying areas around Puget Sound and the north interior Tuesday morning… around the time of high tide. Minor tidal overflow is caused by very high astronomical tides combined with lower than normal atmospheric pressures. The Table below shows time of high tide for areas around Puget Sound… along with the normal tide table value and the expected total tide.

Time of tide table expected expected location high tide value anomaly total tide

• Seattle 7:30 am 12.2 ft 1.6 ft 13.8 ft
• Port Townsend 7:06 am 9.1 ft 1.8 ft 10.9 ft
• Bellingham 8:12 am 9.6 ft 1.9 ft 11.5 ft

Minor tidal overflow problems usually begin at 13.5 feet around Seattle and 11.5 feet around Bellingham… and the current forecasts for those areas just meet or exceed those levels. In addition… the atmospheric pressure could be a little lower than forecast… and local winds may cause water to pile up along shorelines more than expected… possibly higher than the expected total tide values. Southeast winds 20 to 30 knots are forecast over the northern inland waters Tuesday morning as another deep low pressure system moves northward offshore. Winds over the waters of Puget Sound are expected to be south 10 to 20 knots Tuesday morning.

Another very high astronomical tide will occur Wednesday morning. The forecast tides for Wednesday morning are slightly lower than for Tuesday… but computer model forecasts indicate the anomaly will still be large enough so that minor tidal overflow problems remain a possibility.

Precautionary/preparedness actions…

Minor tidal over flow can cause local flooding along shorelines and nearby low-lying areas.

You know it’s November in the Northwest when another Weather Advisory gets posted – this one a “Wind Advisory” predicted to hit around 6pm Sunday night and continue for at least another 24 hours.

As usual, batten down your blue tarps Burien!

Here’s the statement, issued by the National Weather Service at 3:22pm Sunday, Nov. 15th:

Statement as of 3:22 PM PST on November 15, 2009

… Wind Advisory in effect from 6 PM this evening to 6 PM PST Monday…

… High wind watch in effect from Monday evening through Tuesday afternoon…

The National Weather Service in Seattle has issued a Wind Advisory… which is in effect from 6 PM this evening to 6 PM PST Monday. A high wind watch has also been issued. This high wind watch is in effect from Monday evening through Tuesday afternoon.

South winds of 25 to 35 mph with local gusts to 50 mph are expected to develop tonight and continue through much of the day Tuesday.

A deeper low is expected to move north through the coastal waters late Monday night and Tuesday. Widespread damaging winds of 40 mph with gusts to 60 mph are possible with this second deeper system.

Precautionary/preparedness actions…

A Wind Advisory is issued when sustained winds of 30 to 39 mph or gusts of 45 to 57 mph are likely. Winds this strong can snap small tree branches… topple small or shallow-rooted trees… and cause local power outages.

A high wind watch means conditions are favorable for damaging winds. High winds can topple trees… down power lines… and damage some structures. People in the watch area should prepare for the possibility of power outages.

We haven’t seen one of these since July 29th, when the temps hit 104-degrees – an actual Weather Advisory – this time for quite the opposite: a cold/wet and “breezy” front to come in Saturday.

Consider yourselves warned, especially those of you planning on attending say, an outdoor wedding late Saturday afternoon:

… A cool and wet Labor Day weekend is expected across western Washington…

A cold front will move across western Washington on Saturday… bringing periods of rain… cooler… and breezy conditions. The front will be followed by an unseasonably cool and showery upper level trough Saturday night through Labor Day. Temperatures in The Lowlands Sunday and Labor Day will struggle to hit the lower 60s during the afternoon hours.

Snow levels in the mountains will be around 6000 feet Saturday night into Labor Day. Temperatures above 3500 feet will remain in
the 40s during the daytime hours. Cold temperatures will be accompanied by occasional showers and breezy conditions.

People planning travel into the mountains this weekend should be prepared for fall-like conditions. Dress warm and take rain gear. Hypothermia can occur with these expected conditions.

Need further evidence to get your rain coat out? Local celeb Meteorologist Cliff Mass talks about this weather event on his blog here.

Photo courtesy Gregory Rehmke.

The National Weather Service issued a “Special Weather Statement” Sunday afternoon about a strong, windy weather system that’s predicted to hit the area Monday night.

We’re no Cliff Mass, but one thing that struck us was the mention of the pressure in this storm, rated at 980 millibars. As comparison, Hurricane Katrina was rated at 920 mb (lower is stronger), and the Inauguration Day storm of 1993 was rated between 972-980 mb (for a great read on northwest storm systems, with info on pressures, click here).

While it’s a powerful system, since the storm will weaken as it pushes inland, wind speeds are predicted to be between 20-35 mph, with gusts up to 45. There could be downed trees and power outages though, so you may want to batten down all those flowers you worked on Sunday.

Here’s the statement:

Statement as of 3:51 PM PDT on May 03, 2009

… Very windy conditions are expected to develop in the western Washington lowlands Monday night and continue through Tuesday morning…

A developing storm system in the central Pacific is expected to deepen to around 980 mb as it moves through the Washington offshore waters toward northern Vancouver Island Monday and Monday night. A strong frontal system associated with this low will move through western Washington Monday night.

A storm and frontal system of this magnitude is more typical of late fall or winter than of early may.

At this point it appears that south winds of 20 to 35 mph with gusts to 45 mph will develop Monday night as the front moves through and continue through the early morning hours on Tuesday. Many deciduous trees are now leafing. So winds of this magnitude may break some large branches and possibly topple a few trees.

Local power outages are possible.

Late Sunday afternoon, the National Weather Service issued an “Air Stagnation Advisory,” which basically declares a burn ban – so even though it’s cold outside, don’t you dare start a fire in the fireplace!

Here’s the advisory:

…Air stagnation advisory remains in effect until 10 PM PST Tuesday…

Stagnant conditions will return overnight as winds across most of the interior lowlands of western Washington become light. A strong temperature inversion remains over most of western Washington tonight that is limiting mixing and is trapping stagnant air near the surface. The exception is the east Puget Sound lowlands where gusty east winds will maintain good mixing and ventilation. The stagnant conditions are expected to last into Tuesday night.

People in western Washington should be aware that bans on outdoor burning are possible. Be sure to check with your local pollution control agency. In the Seattle area you can contact the Puget Sound clean air agency or visit their website at www.Pscleanair.Org.

Precautionary/preparedness actions… do not burn trash and be aware of local regulations for burning. People with respiratory difficulties such as asthma may find that strenuous exercise outdoors in this increasingly stagnant air mass may worsen the condition.

According to Pscleanair.Org, here are the restrictions under a Stage 1 burn ban:

• No burning is allowed in fireplaces or uncertified wood stoves, unless this is your only adequate source of heat. Residents should rely instead on their home’s other, cleaner source of heat (such as their furnace or electric baseboard heaters) for a few days until air quality improves, the public health risk diminishes and the ban is cancelled.;
• Natural gas, propane and pellet stoves or inserts ARE allowed.
• No visible smoke is allowed from any wood stove or fireplace, certified or not, beyond a 20-minute start-up period.
• All outdoor burning is prohibited, even in areas where outdoor burning is not permanently banned. This includes recreational fires such as bonfires, campfires and the use of fire pits and chimineas. Burning of storm and flood damage debris is also prohibited. The Clean Air Agency encourages people to take advantage of free flood-debris disposal coordinated by their county.
• Burn ban violations are subject to a $1,000 penalty.

You can monitor air quality here: http://www.pscleanair.org/airq/aqi.aspx, including when the burn ban may be lifted.

Long story short: if you live in a valley, near a river or flood zone, or on a bluff above or near a slide zone, you’re SCREWED, as a major storm is moving in and the National Weather Service has issued THREE advisories:

1. Flood Watch (previously posted here)
2. Major Wind Advisory
3. “Special Weather Statement” on increased landslide danger

Here’s the Wind Advisory:

… Wind Advisory in effect until 10 am PST Wednesday…

The National Weather Service in Seattle has issued a Wind Advisory… which is in effect until 10 am PST Wednesday.

A strong storm which is bringing heavy rain to the mountains is also causing strong winds in the Seattle area. These winds will last off and on through the night and diminish Wednesday morning.

Precautionary/preparedness actions…

A Wind Advisory is issued when sustained winds of 30 to 39 mph or gusts of 45 to 57 mph are likely. Winds this strong can snap small tree branches… topple small or shallow-rooted trees… and cause local power outages.

And now, the “Special Weather Statement” regarding heavy rains and the potential for landslides:

… Heavy rain to dramatically increase risk for rainfall induced landslides…

Previous rainfall amounts have been around two to three inches in the Seattle area over the past 18 days. This has resulted in moderate levels of soil moisture around western Washington. Heavy rainfall of nearly two inches in 24 hours and over three inches in 48 hours is expected this afternoon through Wednesday night. This amount of rain will put extra pressure on soil instability leading to an increased risk of landslides in slide prone areas. A diminishing risk of landslides will continue for several days after the rain ends.

The slow melt of the snow that has fallen over the last couple of weeks has had an additional soil wetting effect. In areas outside of Seattle… storm total rainfall could be 3 to 8 inches in The Lowlands and 10 to 20 inches in the mountains. For these reasons the landslide risk is higher than the USGS charts would suggest.

The amount of rainfall forecast in 24 hours… on top of the cumulative rainfall over the last three weeks… will push western Washington soils to the point where they are above the USGS landslide index. When cumulative rainfall exceeds the USGS landslide cumulative threshold index… rainfall induced landslides are possible during intense rainfall or when rainfall amounts exceed two inches in 24 hours.

While the USGS rainfall thresholds were designed for the Seattle area of the Puget Sound… most of The Lowlands of western Washington are similarly susceptible to landslides caused by wet soils. Areas most susceptible to landslides under these conditions are steep coastal Bluffs and other steep hillsides.

For more information about current conditions… visit www.Weather.Gov/Seattle… select hydrology… and then scroll down for the link to the USGS landslide information Page.

If you need help, here’s some info that may come in handy:

• Sandbags are available for anyone in flood area – check this website here for details
• King County’s Flood Warning Center is operating; a recorded flood-information hotline is also updated each hour for citizens wanting information in flood areas:
  • Call 206-296-8200 or 1-800-945-9263
    
  • Citizens who need help interpreting flood information should call 206-296-4535 or 1-800-768-7932
• Problems on county-maintained roads can be reported by calling 206-296-8100 or 1-800-KC-ROADS

At 3:24pm Monday Jan. 5th, the National Weather Service issued the following Flood Watch Advisory:

… Flood Watch in effect from Tuesday evening through Friday afternoon…

Rain will fall over western Washington beginning Tuesday afternoon and continuing into Thursday. Rain will be heavy at times in the mountains… along the coast… and over the southwest interior and lower Chehalis valley. The Cascades and Olympics will get 5-10 inches with some southwest facing slopes 15-20 inches. Perhaps 6 inches will fall on the coast and SW interior. The Seattle area could see 4 inches over the two days and northern lowland areas will get an inch or two.

This sums to a real flood potential… both for river flooding and urban and small stream flooding. This flooding will be driven by heavy rain that has been consistently present in numerical models. Some flooding seems certain… and major flooding is possible on some rivers.

Precautionary/preparedness actions…

Monitor weather forecasts in case conditions change. If you live near a river… prepare for flooding now.

There are plenty of creeks and streams in the Burien area, so be sure to check for clear drains and clogs if you live or work near one.

6:15am UPDATE 1/5/09: :Last night’s snow is melting (or has melted depending on where you are), and it looks like all Highline Schools are operating on a normal schedule, with NO delays.

• However, JFK High School will be starting LATE – at 10:30am.
• Most King County Metro Transit buses are on their regular routing for Monday morning, but some will be chained. This could cause some service delays as the buses travel more slowly across both slushy and bare roadways. Metro riders to check service status online or by calling (206) 553-3000 before traveling today.
• Today’s weather forecast shows NO SNOW: “Scattered showers. Mostly cloudy, with a high near 47. West southwest wind between 10 and 15 mph. Chance of precipitation is 50%.”

UPDATE 10:30pm 1/4/09: Looks like the sudden rush of heavy snow showers is fading and/or turning to a wet mix, so perhaps both garbage collections and school will go on as normal on Monday.

Outside The BTB Home HQ (near sea level) we received just over an inch of the stuff, which was very heavy and wet – not a good mix for branches and power lines; in fact, we heard of some sporadic power outages around Burien, including the Seahurst neighborhood around 9:30pm.

Be sure to check here Monday morning for the latest weather, school and road closure updates, and in the meantime, enjoy another exciting winter’s night!

PREVIOUSLY:

UPDATE 7pm 1/4/09: Okay, so perhaps we’ll be wrong about tonight’s snow, but according to the precipitation prognosticators, the snow is supposed to turn into rain late tonight/early tomorrow.

However, that hasn’t stopped the National Weather Service from posting this Winter Weather Advisory, which is in effect until 9pm tonight:

… Winter Weather Advisory in effect until 9 PM PST this evening…

The National Weather Service in Seattle has issued a Winter Weather Advisory… which is in effect until 9 PM PST this evening.

Snowfall amounts of 1 to 3 inches are likely across the Seattle… Tacoma and Everett areas… with snow changing over to rain later this evening.

Precautionary/preparedness actions…

A Winter Weather Advisory means that periods of snow will cause travel difficulties. Be prepared for slippery roads and limited visibilities… and use caution while driving.

PREVIOUSLY: It’s snowing again in Burien, but don’t worry folks – even though tomorrow is the first day back at school for kids, our patented B-Town Blog Weather Rock™ predicts that temps will be in the upper 40s tomorrow will change everything to rain as well as prevent any rash decisions by school officials.

However, one never knows with the weather ’round these parts, so be sure to check back and watch the webcams we’ve got posted here, and be sure to refresh the page to see the latest images:

Only patches of snow remain in the Burien area Saturday (some side roads may still be slushy), and proof that it is melting lies above in the sad crime scene photo of a one-time Snowman’s remains found on an area lawn.

But fear not B-Towners, for we all know that Frosty will return again.

The only question remains: how soon?

What we do know is:

• The rain will continue for the next several days with highs in the 40s.
• A Flood Watch is still in effect for small streams in King County; here’s the warning from the National Weather Service:

Rain locally heavy at times will persist through tonight. Rainfall amounts of a half to one inch with locally higher amounts on the coast are likely by Sunday morning. This combined with melting snow across The Lowlands or elevations below 2000 feet will likely result in some urban or small stream flooding. Residents in urban areas are strongly encouraged to clear any blockages of storms drains before it causes flooding problems.

Excessive runoff from rain and snow melt will cause ponding of water on highways… streets and underpasses… in urban areas with poor or overwhelmed drainage… and will also cause elevated levels on small creeks and streams.

Do not underestimate the power of flood waters. Only a few inches of rapidly flowing water can quickly carry away your vehicle.

As we were returning (slowly of course) on Sylvester Road from an all-day excursion to the eastside, we were nearly run off the road by an approaching large truck-like vehicle in the opposite lane.

Turns out it was a snowplow.

An actual snowplow.

Plowing the snow.

In Brrrien!

As you may recall from a report we did on Thursday (Dec. 18th), several Burien-area residents were upset enough with the previous lack of city snowplowing and road care that they posted numerous rants on Craigslist.

Speaking of Mr. Plow, the City of Seattle sends us this press release about their road-clearing efforts, which we’ve truncated here:

At a briefing this evening at the Emergency Operations Center, Mayor Greg Nickels announced that a fleet of 27 snow plows are clearing Seattle roads and seven utility repair crews stand ready to respond as a winter storm hits the region.

The city of Seattle activated its Emergency Operations Center at 2 pm on Saturday, coordinating responses by the Department of Transportation, Seattle City Light, Seattle Public Utilities, Human Services, Police, Fire and Parks departments.

Snow and ice removal crews will continue clearing arterial roads through the night. Road conditions may become icy tonight as temperatures drop. Two trucks will be dedicated to the West Seattle Bridge and the Alaskan Way Viaduct. The Seattle Department of Transportation is urging residents only to drive if necessary.

A primary concern tonight is expected to be high winds, particular in east King County. At this hour, there are no power outages within the city of Seattle, but City Light is prepared to call in as many crews as needed if conditions change.

Three severe weather shelters remain open at least through Monday night: City Hall, Frye Hotel, and Seattle Center Pavilion B. Shelter beds are still available. Last night, 143 people stayed at the three shelters. During the day, Seattle residents can find warm, public space at Parks Department community centers and the Seattle Center. The following community centers will be open on Sunday from noon to 5 p.m.: Garfield Community Center, Rainier Beach Community Center, South Park Community Center, Rainier Community Center and Hiawatha Community Center.

Seattle’s recycling and garbage transfer stations will be closed tomorrow. Solid waste customers who were missed for pickup today should bring in their containers until next week.

Not to be outdone, the City of Burien issued its own safety alert this afternoon:

SEVERE WEATHER ALERT: Snow & high winds are predicted for today, and Burien residents are urged to be prepared for possible power outages and extreme cold.

The City of Burien is monitoring conditions and will post updated information as it becomes available to the City website (www.burienwa.gov).

All Parks & Recreation programs and facility rentals are canceled. Metro Bus Service is severely impacted.

For complete and up-to-date information regarding this severe storm, visit the National Weather Service website at www.weather.gov/seattle.

Of course we went to the city’s website, expecting to see more detailed info, but alas, the most recent update was from yesterday (Fri. 12/19). Hmmm…

Also, here’s the latest Winter Storm Warning from our friends at the National Weather Service:

A Winter Storm Warning remains in effect until 10 am PST Sunday.

Another round of heavy snow is expected tonight through Sunday morning. Heaviest snow will occur on the Kitsap peninsula… along Hood Canal… and from Olympia and Chehalis west to the central coast near Ocean Shores. 10 to 18 inches of snow is expected close to the Hood Canal. Other locations within this area should get 5 to 12 inches of snow.

Along the I-5 Corridor North of Tacoma… including Seattle and Everett… storm total snowfall of 4 to 8 inches is expected. In general… lighter amounts will occur near the Cascade foothills with heavier amounts farther west along the shores of Puget Sound. Some parts of eastern King County… where wind is a big threat… will receive 1 inch or less of snowfall.

Late tonight into Sunday morning… freezing rain is possible in Grays Harbor County and the lower Chehalis valley. If more precipitation occurs in the form of freezing rain than snow…  then an ice storm would be possible with ice accumulations in excess of one quarter of an inch. Ice storms are capable of causing power lines and large tree branches to snap and cause major travel disruptions.

Precautionary/preparedness actions…

A Winter Storm Warning means significant amounts of snow… sleet… and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible.

And the B-Town Blog Weather Rock™’s first-hand (or rock) report is thus:

• As of 7pm 12/20, 1-inch of new snow has accumulated since the storm moved in this afternoon. We now have between 5-7 inches of snow here, and growing.
• The new snow is icier, powdery, and harder to make snowballs and snowpeople with. Dang.
• This type of icy snow sparkles in the basking glow of the still-functioning street lights. Purdy.
• The Weather Rock™ predicts 3-5 inches will fall overnight.
• The Weather Rock™ has detected little or no wind. Yet.
• Our new kerosene heater is still sitting in its box, awaiting emergency use for potential power outages.
• Some sleet is mixed in with this batch of precipitation – evidenced as it clumped up quickly into freezing messes on the windshield as we drove. Is this a sign of a potential “ice storm” that may be developing? Stay tuned…

“Woo! Snow happens even in Burien” by Flickr Photog Crocidillicus

The big storm’s a-comin’ folks, and should hit sometime tonight and continue through Sunday morning.

Most likely there will be significant snowfall in the Burien area (4-8 more inches), since we lie in the zone where the storm will hang out. Also be prepared, as there will be high winds and possibly sleet, which means ice on power lines, tree branches, etc. and you know what that means – power outages.

Here’s the Weather Advisory as of Saturday 12/20/08 at 5:18am:

The Winter Storm Warning is now in effect from 4 PM this afternoon to 10 am PST Sunday.

A major winter storm is on tap for later today into Sunday. Heavy snow is expected to develop along the coast this afternoon and then spread into the interior of western Washington early this evening. Heaviest snow will occur on the Kitsap peninsula… along Hood Canal… and from Olympia and Chehalis west to the central coast near Ocean Shores. 10 to 18 inches of snow is expected close to the Hood Canal. Other locations within this area should get 5 to 12 inches of snow.

Along the I-5 Corridor North of Tacoma… including Seattle and Everett… storm total snowfall of 4 to 8 inches is expected. In general… lighter amounts will occur near the Cascade foothills with heavier amounts farther west along the shores of Puget Sound. Some parts of eastern King County… where wind is a big threat… will receive 1 inch or less of snowfall. The heaviest snowfall is expected between 7 PM tonight and 4 am Sunday morning.

Late tonight into Sunday morning… locations from Tacoma on south through Lewis County and west to the coast the precipitation could possibly change over to sleet or freezing rain. Freezing rain is most likely in Grays Harbor County and the lower Chehalis valley. If more precipitation occurs in the form of freezing rain than snow… then an ice storm would be possible with ice accumulations in excess of one quarter of an inch. This is not a certainty but should be kept in mind. Ice storms are capable of causing power lines and large tree branches to snap and cause major travel disruptions.

Precautionary/preparedness actions…

A Winter Storm Warning means significant amounts of snow… sleet… and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible.

Have any cool snow/ice photos to share?

Please either email us or add ‘em to our Flickr Group so we can share them!

A big new winter storm is barreling towards us, and will strike sometime Saturday, Dec. 20th, possibly around “dinner time,” possibly earlier.

I heard a live broadcast on the radio thingy this afternoon from a spokesman for the National Weather Service, and what he said made me drive to McLendon’s and buy a kerosene heater. He used phrases like “major event” “up to 75-90 mph gusts” and this clincher: “possible life-threatening situation in places.”

Then I harkened back to two previous winter events: one in 1995 when power was out for about a week, and the other from two years ago when it was out for 4-1/2 days.

I have a feeling I’ll be thanking McLendon’s come Sunday night.

Here’s the latest winter weather advisory (as of 3:59pm 12/19/08) courtesy the National Weather Service:

… Winter Storm Warning in effect from 4 PM Saturday to 4 PM PST Sunday…

The National Weather Service in Seattle has issued a Winter Storm Warning… which is in effect from 4 PM Saturday to 4 PM PST Sunday. The Winter Storm Watch is no longer in effect.

A major winter storm is on tap this weekend. Heavy snow is expected to develop along the coast on Saturday afternoon and then spread into the interior of western Washington early Saturday evening. Heaviest snow will occur on the Kitsap peninsula… along Hood Canal… and from Olympia and Chehalis west to the central coast near Ocean Shores. 10 to 18 inches of snow is expected close to Hood Canal. Other locations within this area should get 5 to 12 inches of snow.

Along the I-5 Corridor North of Tacoma… including Seattle and Everett… storm-total snowfall of 4 to 8 inches is expected. Western Skagit and Whatcom counties should receive about 3 to 5 inches of snow. In general… lighter amounts will occur near the Cascade foothills with heavier amounts further west along the shores of Puget Sound. Some parts of eastern King County… where wind is a big threat… will receive 1 inch or less of snowfall.

Late Saturday night and Sunday morning… locations from Tacoma on south through Lewis County and west to the coast are expected to mix with sleet and freezing rain. Freezing rain is most likely in Grays Harbor County and the lower Chehalis valley. If more precipitation occurs in the form of freezing rain than snow… then an ice storm would be possible with ice accumulations in excess of one-quarter inch. This is not a certainty but should be kept in mind. Ice storms are capable of causing power lines and large tree branches to snap and cause major travel disruptions.

Precautionary/preparedness actions…

Winter Storm Warning means significant amounts of snow… sleet… and ice are expected or occurring. Strong winds are also possible. This will make travel very hazardous or impossible.

The National Weather Service has a Winter Weather Advisory for Wednesday Dec. 17th, and says we should expect up to four inches of snow over the next 24 hours.

Also, most schools in the Burien area are closed (although JFK High School opens at 10:30am and St. Francis of Assisi starts 2 hours late) in anticipation of this major snow event:

• HIGHLINE SCHOOL DISTRICT: CLOSED
  Administrative Offices Open.
• JOHN F. KENNEDY HIGH SCHOOL: 10:30am START
  
• WESTSIDE SCHOOL: CLOSED
• ST. FRANCIS OF ASSISI SCHOOL: 2 HOURS LATE
  
• HAMLIN-ROBINSON SCHOOL: CLOSED
  
• SEATTLE PUBLIC SCHOOLS: CLOSED
  No Out-of-District Transport. Uncertain weather forecast and concern for staff and student safety.
• TUKWILA SCHOOL DISTRICT: 2 HOURS LATE
  No. A.M. ECEAP No. A.M. Preschool
• FEDERAL WAY SCHOOL DISTRICT: 2 HOURS LATE
  Emergency Snow Routes, WATCH FOR UPDATES, No AM Kindergarten, Preschool, or Shuttles. No AM/PM HDST, ECEAP, ELO, or Puget Sound Skills, No Activity Buses, No Elementary Breakfast Programs, No Out-of-District Transportation.

And now, your daily fix of a Winter Weather Advisory:

… Winter Weather Advisory in effect until 10 am PST Thursday…

The National Weather Service in Seattle has issued a Winter Weather Advisory for the Seattle… Tacoma… Bremerton and Hood Canal areas… and the southwest interior… lower Chehalis valley and the central coast… which is in effect until 10 am PST Thursday. The Winter Storm Watch is no longer in effect.

Lower snow accumulations are expected over the southern part of western Washington today and tonight. This is due mainly to the central Puget Sound region being shadowed by the Olympics and southwest winds bringing above freezing air inland up the lower Chehalis valley from the central coast.

Over the central Puget Sound region… including Seattle… Tacoma… Bremerton and the Hood Canal area… up to 2 inches of snow is expected today. Another 1 to 3 inches may fall tonight as a convergence zone forms over the area. A total accumulation of 2 to 5 inches is expected through tonight… with the greatest amounts over the East Part.

Over the southwest interior… 1 to 3 inches of snow is expected today with an additional 1 to 3 inches tonight. The greatest amounts will be closer to the Cascades and east of the I-5
corridor.

Over the lower Chehalis valley and the central coast… up to 2 inches of snow is expected today with another trace to 2 inches expected tonight. Total accumulations will be locally up to 4 inches. The greatest amounts will be further inland away from the ocean. Warmer air will produce mainly rain along the coast… with rain spreading further inland this afternoon as southwest winds send the warmer air up the Chehalis valley. The rain or rain and snow mixed will change back to snow tonight as the air mass cools off.

Over the Admiralty Inlet area… including Whidbey Island and Port Townsend… 1 to 3 inches of snow is expected today with up to 2 inches additional accumulation tonight. The lower amounts here are due to a combination of shadowing from the Olympics and the presence of slightly warmer air moving east through the Strait of Juan de Fuca. However… cooler air will move over area tonight as northeast outflow from the Fraser valley begins to develop. Total accumulations of 1 to 5 inches is expected.

Precautionary/preparedness actions…

Monitor weather forecasts and Road conditions carefully. Stay indoors if at all possible. Travel is likely to be adversely impacted through Thursday.

So let me get this straight – last weekend the temp hit 75 or so, and this coming weekend it may…gulp…SNOW???

Or at least freeze all the spring blooms?

What’s going on?

Is this some kind of Earth Day practical joke?

From the National Weather Service, updated 10:21 AM PDT April 16, 2008:

Unusually cold weather is expected Friday through early next week…

A deep upper level low pressure system moving southeast from the Gulf of Alaska will move into the area Friday and will linger through early next week. This upper level low will give quite cool and unstable conditions to the area Friday and Saturday. While drier air will begin to filter into the area Sunday into Monday… temperatures will remain unusually cool for mid to late April.

At this time of year… temperatures in The Lowlands typically range from lows 35 to 45… and highs are near 60. Low temperatures on Friday and Saturday will generally be in the 30s… while highs stay in the 40s. These temperatures are more typical of early to mid February. Near record low maximum and minimum temperatures are likely on Saturday. Temperatures in the mountains will stay in the 20s and 30s.

Snow levels Friday night and Saturday morning will average around 1000 feet… and may fall to near sea level in heavier showers. Any snow that falls in The Lowlands is unlikely to stick… except briefly on cars and grass. The mountains and Cascade passes will see accumulating snow Friday through Saturday… with accumulations over the two day period possibly between 1 and 2 feet.

Strong high pressure developing over British Columbia Saturday night into early next week will allow drier air to filter into the area. While daytime temperatures will moderate into the lower tomid 50s Sunday and Monday… nighttime lows will be quite cold for this time of year with any clearing. Frost… with freezing nighttime temperatures in protected and outlying areas will likely cause problems for anyone with sensitive Nursery stock…ornamentals…or vegetables that were planted early.

Monitor the forecasts from the National Weather Service closely the next few days.