Skywarn (TM) spotter News

Fall 2007 Edition

From the National Weather Service - Seattle

 



 

Summer Weather Review

After a normal June, summer 2007 started out with a bang and the first half of July was very warm. In the Seattle area, 2 out of every 3 days were in the 80s and every day through the 16th was above normal at Sea-Tac. There was record breaking heat all across Western Washington on the 11th when Sea-Tac hit 98 degrees and an all time record high temperature was set at Hoquiam at 99 degrees. The second half of July was dramatically cooler, not a single high temperature was over 80 degrees after July 16th.

Number of days the high at Sea-Tac was at or above 80 degrees this year:

May – 4 days (average is 2)

June – 4 days (average is 4)

July – 10 (all in the first half of July - 9 is normal)

August – 6 (average is 8)

September – 2 (average is 3)

In an average year Sea-Tac reaches 80 degrees or more on 25 days, in 2007, through the middle of September, there have been 26 days. Counting just the very warmest days, those at or above 85 degrees, there were 9 days this year with 10 being average. And finally, the number of days at 90 or higher, just the one 98 degree reading (maybe that one should count for two!) and 3 is average.

Although precipitation taken over the entire summer was near normal, there was one unusually wet weather system in July, containing subtropical moisture, and much of Western Washington received twice normal rainfall for the month. August was drier, but still received 2/3rds of normal precip, mostly due to a wet period August 17-21st.


 

Columbus Day Storm Trivia

Match the strongest reported wind gusts with the western Washington location from the 1962 Columbus Day Storm. The answers will appear near the bottom of the Skywarn (TM) Spotter News.

Location

Peak gust speed in MPH

Toledo

80

Renton

83

Paine Field

88

West Point

89

Bellingham

100

Tacoma

113

 

Fall Is Here – What To Expect?

Are you ready for fall and winter? The days are getting shorter, nights longer and temperatures cooling. Fall has arrived, winter is coming, and our storm season is upon us.

October marks the start of our wind storm season and usually goes through early March. Our flood season begins in November and runs through February. Mid November is when our lowland snow season begins and extends into early March. All of these events are infrequent, but most occur during the winter season.

Last winter was very active beginning with a major flood event in early November followed by many wind storms and lowland snow events. So what is ahead? It looks like we are headed into a La Nina period. To review, La Nina is when eastern and central Pacific Ocean tropical waters (not the waters off our coast) are cooler than normal – the opposite of El Nino or warmer tropical waters than normal. Those cooler tropical sea-surface temperatures adjust tropical weather patterns and in turn, adjust how the jetstream and storm track behaves at our latitude.

The storm track usually has a variable position either directly into the Pacific NW or north into Alaska and south into our region. Remember the winter of 1998-99? That was our last significant La Nina winter season, a year that produced above average precipitation and a heavy mountain snow pack. Mt Baker recorded a new world record 1140 inches of snowfall. It also included a number of minor flood events, lowland snow events and a few minor wind events.

With La Nina conditions anticipated for this winter season, what is expected for our region? The latest winter season outlook from the National Weather Service’s Climate Prediction Center (web site at www.cpc.noaa.gov/index.html. ) is for increased odds on wetter than normal conditions particularly this fall, and equal chances of temperatures below, near or above normal. It is anticipated that the mountain snow pack will be above normal. For the latest winter season weather outlook, check our web site at www.wrh.noaa.gov/seattle. or the above CPC website.

Even though ‘neutral’ or non-El Nino or La Nina winter seasons like last year, usually produce active weather, La Nina winters also tend to produce active seasons, just not usually as active as neutral winters. So, it is anticipated this coming winter might be one we all need to be prepared for in advance.

As a weather spotter, now is the time to prepare your home and business, and brush up on your winter weather reporting criteria. Ensure your rain gauge is clean, and away from obstructions like trees and structures, and ready to go. Ensure your anemometer is in good operating order. If you do not have an anemometer, have your Beaufort scale handy. In addition, ensure your snow boards and marking flags are ready to be placed in an unobstructed location, usually near your rain gauge. When prepared, you’ll be ready to report any heavy rainfall amounts, strong winds and snow amounts. To top it off, fall is our secondary maximum for thunderstorms during the year.

While you are preparing, do you have your minimum three-day preparedness kit for each person ready in case you need to evacuate for a flood event, or the power goes out for an extended period of time? In the wake of recent major disasters around the world the last few years, having a mobile preparedness kit is essential for each family member and business employee, and you may need those supplies for far more than just three days. For complete information about preparedness kits and what to have in them, refer to redcross.org or emd.wa.gov, or pick up a preparedness kit brochure at your local Red Cross chapter or emergency management office. Have a safe winter and we look forward to your weather spotter reports this season.

 

 

Spotter Notes

American Meteorological Society, Puget Sound Chapter - This season's series of meetings will get underway this fall. Watch the chapter's web site at www.atmos.washington.edu/ams for more information about this meeting and future events. Spotters are welcome to join the chapter and get together with the local weather community at chapter meetings.

Spotter Reports Wanted - Some spotters feel their reports may not be important or needed. Oh, contraire!! If you are experiencing strong winds, accumulating snow, or any other spotter report criteria, contact us! These event-driven reports help support warning messages in effect, are reported by the press, help emergency management officials better determine where to deploy their limited resources, encourage people to take action to stay out of harm's way, and verify our warnings. So, don't be shy to contact us when needed !!

Pacific NW Weather Scramble Results - The annual Pacific NW Weather Scramble golf tournament was held on Aug 18th at Ft Lewis Golf Course south of Tacoma. The tournament had 40 players from around the Pacific Northwest. The winning team shot a new tournament record score of 15-under par 57. The team included David Mudd, Travis Sugarman, Paul Meury and Kent Dimmitt all of whom work with the state of Washington in various agencies. The second place team of members or retired from the Washington Dept of Transportation shot an 11-under par 61. All ten teams shot scores under par. Long drives were won by Eric Tolleson (guest), Mike Roll (Army Corps of Engineers), Chris Burcham (guest) and Patty Brumley (guest). Paul Meury, Mike Roll and Steve Marten (Seattle Emerg Mgmt) won a closest to the pin while Jim Farler of the DOT drained the longest putt on the par-3 15th hole. Next year’s tournament is slated to return to Ft Lewis next summer. If you missed this year’s event, try next year.

Skywarn (TM) Spotter Training - Spotter training sessions are planned to held this fall in Mason, Clallam, Kitsap, Snohomish as well as a joint effort with King county, city of Seattle and the University of Washington. For announcements on specific dates and locations near you, see the link on our web site at www.wrh.noaa.gov/sew/SpotterTrain.php or watch your mailbox for announcements. The training helps new and veteran spotters, including interested citizens, amateur radio and law enforcement personnel. If you want to attend one of these sessions, please see the announcements and RSVP with your county emergency management. We look forward to seeing you at a training session near you!

Are You Coo Coo For CoCoRaHS? – Plans are to have CoCoRaHS expand into Washington state in 2008. See www.cocorash.org to learn more about the program. It is essentially a means to report on-line precipitation and snow amounts, quite useful for the overall weather and water communities. The Washington Climatology Office at the University of Washington intends to help coordinate the statewide effort. Stay tuned for more information about this program and how to sign up in the near future.

 

Columbus Day Storm Trivia

Location

Peak wind gust in MPH

Paine Field

80

West Point

83

Tacoma

88

Toledo

89

Renton

100

Bellingham

113

 

Back to National Weather Service Seattle's main page www.wrh.noaa.gov/seattle.