What Caused The Big Thunderstorms Last Week?

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By By Steve Pool

SEATTLE - We had some cool air move in at high altitudes Thursday night combine with our hot daytime weather. Since warm air rises, and with cold air moving in above, it allowed that warm air to rise very high and result in towering thunderstorms.

Also a factor was the Cascades, which added lift to the air as our east winds ramped up the eastern slopes.

These types of thunderstorms aren't too uncommon -- they just typically blow into Eastern Washington with our normal westerly winds. But since the winds were from the east, they blew them west over the Seattle area.

Why so much lightning? It helps that the air was generally dry. Just like how when you scuff your socks on a carpet and then shock someone or something metal when you touch them, that shock is more prevalent when it's drier outside than when it's wetter.

Your Photos

YouNews Changes on the way Changes on the way
The cloud bands around Mt. Rainier are a sure sign of changing weather conditions. These images of Mt. Rainier were taken Thursday evening around 7:30pm with a Nikon D3000
and a 200mm telephoto lens. The dark spots on the 1st image is flock of birds (not dirt on the lens).
YouNews Wednesday morning sunrise Wednesday morning sunrise
Grabbed a few images of Mt. Rainier between 6:30am and 7:30am
before the smoke from the fires rolled back in.
YouNews Bremerton Ghost Bremerton Ghost
While conducting a basic ghost hunt on the USS Turner Joy, we captured what appears to be a face floating in the air.