The primary thunderstorm season in Western Washington usually kicks off in March. Thunderstorms can occur throughout the year, but spring time is prime time, while autumn has another rise in thunderstorm activity as well.
There is a good reason why this region’s thunderstorm season gets rolling in March. Thanks to longer days as spring unfolds, temperatures near the surface are warmer than in winter. Yet, cooler air aloft continues to move onshore from the Gulf of Alaska, creating an unstable air mass allowing warmer air near the surface to rise more easily – much like boiling water on your stove, but on a grander scale. The region’s mountainous terrain
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