Western Washington experiences rare thundersnow and a waterspout due to a winter storm.

A winter storm in Western Washington brought unusual events including thundersnow and a waterspout. The conditions arose from atmospheric instability caused by slight daytime heating and cooling aloft. The waterspout was seen off Birch Bay, and thunder, heard during snowfall, sounded different due to snowflakes muffling the sound. Thundersnow is linked to heavy snowfall, making driving conditions hazardous.

2 months ago
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