Historic February Arctic Blast Recap
As the big thaw continues, the winter of 2013/14 will go down in the record books after three unprecedented February snow and ice storms in just five days blanketed the region. As of Monday morning, the Portland International Airport has received more than 7″ of snowfall for the month of February. This now qualifies as the most February snowfall at the Portland airport in 25 years when more than 8″ fell in the month of February 1989. With more than half of the month yet to go, there is the possibility of adding more snowfall to the record books. Last fall we mentioned that, “anything goes” in a La Nada winter, where neither El Nino or La Nina are present. We also expected, “large swings in month-to-month and even week-to-week weather.” Once again, mother nature has not disappointed this winter. This winter has also featured two arctic blasts in the same winter, which is the first such occurrence since the winter of 1990/91 when two arctic blasts hit the Pacific Northwest in the month of December. Equally impressive are the following storm stats —
* The high temperature of 23 degrees at the Portland International Airport last Thursday was the coldest day of any month of the year since January 30th 1996 (18 years ago) when the high temperature reached 23 at the Portland International Airport.
* The high temperature of 23 degrees at the Portland International Airport last Thursday was the coldest day on record this late in the winter season at the Portland International Airport. Records date back to 1940 (74 years) at the airport.
* The high temperature of 23 degrees at the Portland International Airport last Thursday was the coldest day this late in the winter season in 81 years in Portland when looking even further back to records pre-dating the airport. The last time an equal or colder high temperature was recorded this late in the season in Portland was a 23 degree high temperature recorded back on February 9th 1933 in downtown Portland. Records date back more than 143 years in downtown (1871).
So, How Did This Happen?
“Arctic air from the north and Pacific moisture from the west came together directly over Oregon and dumped quite a bit of snow over the region. This continues the pattern of significant winter snowstorms every five or so years in Portland. The winters of 1998/99, 2003/04, 2008/09 and 2013/14 all saw significant arctic outbreaks and/or snow at low elevations. This winter did not disappoint. The historical average snowfall at the Portland Airport for the entire winter is approximately 6″ and this includes many winters where no snow falls at all. There is a trend for several winters with almost no snow, then a big snowfall, then no snow for a few more winters. Rinse and repeat every five or so years. This past week was a classic example of nearly the perfect snowfall setup for Portland / Vancouver and the Willamette Valley. Cold arctic air swept down from Canada, followed by several Pacific storms sliding over top of the cold air. Cold air is heavy, dense and extremely hard to displace as long as the center of these storms continued to stay south of Portland, as they did. This allowed cold easterly low level winds to blow from the east transporting additional cold and dry air into NW Oregon and SW Washington. This was somewhat similar in nature to the Christmas snowstorms of December 2008.”
Preliminary Snowfall and Ice Totals From All Three Storms
Special thanks to the great staff at the Portland office of the National Weather Service for these storm stats. The following are totals for all three storms, beginning last week. The official Portland total (taken at the forecast office on NE 122nd Ave) is listed below (7.3″):
NATIONAL WEATHER SERVICE PORTLAND OR
840 AM PST MON FEB 10 2014
LISTED BELOW ARE THE PRELIMINARY STORM TOTAL SNOW AND ICE REPORTS
RECEIVED FROM THURSDAY…FEB 6 THROUGH SUNDAY…FEB 9.
LOCATION SNOW (IN)
————————————–
…COAST…
NECANICUM,OR……………10.0
WHEELER,OR……………..9.0
MANZANITA,OR……………8.0
ROCKAWAY BEACH,OR……….7.0
NEHALEM 4NE, OR…………7.0
ALSEA,OR……………….6.0
TOKELAND 5NW, WA………..5.0
TILLAMOOK,OR……………4.0
WALDPORT,OR…………….3.5
PACIFIC CITY,OR…………3.5
YACHATS,OR……………..2.0
WARRENTON,OR……………2.0
NEWPORT,OR……………..2.0
ASTORIA 12E, OR…………2.0
…COAST RANGE…
MARYS PEAK ,OR………….14.0
VERNONIA,OR…………….13.0
SADDLE MOUNTAIN, OR……..13.0
WILSON RIVER SUMMIT,OR…..11.0
BLODGETT,OR…………….11.0
SUNSET SUMMIT,OR………..10.0
MANNING,OR……………..9.5
MILLER WOODS, OR………..9.0
GRAND RONDE, OR…………9.0
BANKS,OR……………….5.5
HASKINS DAM, OR…………4.0
SWISS HOME,OR…………..2.5
…INLAND VALLEYS…
MONROE 6NW, OR………….16.0
CORVALLIS, OR…………..15.0
PHILOMATH, OR…………..15.0
ALBANY, OR……………..15.0
SCIO, OR……………….13.0
STAYTON, OR…………….12.0
DALLAS, OR……………..12.0
SALEM 3NW, OR…………..12.0
GASTON, OR……………..12.0
RIDGEFIELD,WA…………..12.0
ST. HELENS,OR…………..10.0
INDEPENDENCE,OR…………10.0
CLATSKANIE,OR…………..10.0
ALBANY,OR………………10.0
COLUMBIA CITY, OR……….10.0
FOREST GROVE,OR…………9.0-10.0
WASHOUGAL,WA……………9.0
STAYTON,OR……………..9.0
ALBANY,OR………………9.0
CLATSKANIE, OR………….9.0
LACOMB 3NNE, OR…………9.0
SHERIDAN 5NW, OR………..9.0
MONROE,OR………………8.8
SCAPPOOSE,OR……………8.5
VANCOUVER, WA…………..8.0
MT. ANGEL, OR…………..8.0
SALMON CREEK,WA…………8.0-10.0
PORTLAND,OR…………….5.0-8.0
SCIO,OR………………..7.5
PORTLAND NWS OFFICE……..7.3
LEBANNON,OR…………….7.2
BATTLE GROUND,WA………..7.0
TROUTDALE 5E, OR………..7.0
WOODLAND,WA…………….7.0
EUGENE,OR………………7.0
4SW GASTON,OR…………..7.0
8 MI SSW MONMOUTH,OR…….7.0
HALSEY,OR………………7.0
KALAMA,WA………………6.25
CANBY,OR……………….6.0
DALLAS,OR………………6.0
GRESHAM,OR……………..6.0
TURNER,OR………………6.0
SALEM,OR……………….6.0
HILLSBORO,OR……………6.0
LONGVIEW,WA…………….6.0
KEIZER,OR………………6.0
OREGON CITY,OR………….5.5
TIGARD,OR………………5.5
CORNELIUS,OR……………5.5
MCMINNVILLE,OR………….5.0
YAMHILL,OR……………..5.0
KELSO, WA………………5.0
ARIEL, WA………………5.0
MOLALLA 7NE, OR…………4.0
GRAYS RIVER, WA…………1.0
…FOOTHILLS…
MARION FORKS,OR…………19.0
DETROIT,OR……………..14.0
SANDY,OR……………….6.0
RHODODENDRON, OR………..6.0
…CASCADES…
WILLAMETTE PASS EAST,OR….22.0
TIMBERLINE,OR…………..16.0
MT HOOD MEADOWS,OR………17.0
GOVERNMENT CAMP,OR………16.0
SANTIAM PASSS,OR………..14.0
BELKNAP SPRINGS,OR………10.0
BENNETT PASS,OR…………10.0
WHITE PASS,OR…………..10.0
HOODOO BUTTE,OR…………7.0
…GORGE…
HOOD RIVER,OR…………..10.0-12.0
CASCADE LOCKS,OR………..8.0
BONNEVILLE DAM, OR………6.0
…UPPER HOOD RIVER VALLEY…
PARKDALE,OR…………….21.0
….ICE ACCUMULATIONS FROM FREEZING RAIN……….
LOCATION ICE (IN) DURATION REPORT TIME
———————————————————————
…COAST…
NEWPORT,OR……………..0.25
…COAST RANGE…
BLODGETT,OR…………….0.5
…INLAND VALLEYS…
EUGENE,OR………………0.5
SWEET HOME,OR…………..0.5
LEBANON,OR……………..0.5
FAIRVIEW,OR…………….0.4
1 ENE GRESHAM,OR………..0.3
EUGENE,OR………………0.3
GRESHAM,OR……………..0.25
DALLAS,OR………………0.25
EUGENE,OR………………0.25
SALEM,OR……………….0.25
4NW PHILOMATH,OR………..0.25
CAMAS,WA……………….0.25
1 SSW PORTLAND AIRPORT,OR..0.25
BATTLE GROUND,WA………..0.25
CLACKAMAS,OR……………0.25
PLEASANT HILL,OR………..0.2
CLACKAMAS,OR……………0.1
LEBANON,OR……………..0.2
CORVALLIS,OR……………0.15
CAMAS,WA……………….0.1
LEBANON,OR……………..0.1
HAPPY VALLEY,OR…………0.1
PORTLAND,OR…………….0.1
…FOOTHILLS…
PLEASANT HILL,OR………..0.20
SANDY,OR……………….0.05
Stay tuned!
Columbian Newspaper Weather Blogger
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