Posted on December 7, 2009
Just about every year in Whatcom County ( which is happening Now) a "Northeaster" a sub zero wind and air mass that comes blasting through Whatcom County from the North east. On rare years we get none. On opposite rare years, we get 3 separate ones. I have experienced them as early as mid November and as late as mid March. The towns of Sumas, Lynden, Ferndale, Blaine, Everson and Nooksac Get blasted with winds 40 to 80 miles per hour ( on very rare occasions 100 mph) Bellingham, Deming and Acme are protected by Mountain ranges from the direct blast of the wind. But these areas do get the Cold air mass that can hang around for up to a week but usually 4 days or less, makes for very cold but beautiful days. The views of the Snow caped Peeks are spectacular. The Marine and Island views are also great.
The Cold air mass develops over the "interior Canadian Shield" ( Hudson Bay, Northwest Territories, Manitoba, Saskatchewan, Alberta ) The cold air builds higher and higher over the Canadian Shield, until it falls over the Canadian Rocky Mountain Passes This Freezing wind flows down the various passes and funnels to the Frazier river Canyon, in the same manner that the rivers flow into the Frazer river. This funneling effect ( the venturi effect) increases the wind speed. and opens up into the British Columbia Lower Mainland/Frazier Valley. In fact the Valley that Sumas Lynden and Ferndale is Geomorphicly topographically Part of, is the Frazier river Delta dating back 11,000 years ago when the last local ice age was melting back.
After a few days our more normal weather pattern comes off the Pacific Ocean pushing the Polar air mass east and we get wetter and warmer weather. ( in the transition period, sometimes we get a snow storm).