Record-breaking heat in Seattle and Olympia

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by KING 5 News

KING5.com

Posted on September 11, 2013 at 4:26 PM

Updated Wednesday, Sep 11 at 10:21 PM

A record high for the day was set in Seattle Wednesday afternoon at a toasty 93 degrees. The old record of 87 was set in 2009.

Olympia also set a new record high at 91; Bellingham tied the record at 83.

"A combination of what we call a thermal trough (the finger of warm air surging northward from Willamette Valley) and warming downslope winds led to record highs over the Puget Sound area," said KING 5 Meteorologist Jeff Renner.

"A combination of what we call a thermal trough (the finger of warm air surging northward from Willamette Valley) and warming downslope winds led to record highs over the Puget Sound area," said KING 5 Meteorologist Jeff Renner.

"But that trough nudged just far enough inland to allow ocean air to flow onto the ocean beaches, leading to cooling and the development of low clouds."

So we'll see some gradual changes further inland on Thursday.

"Highs will not return to the 90s, but should remain in the mid to upper 80s," said Renner.

Further cooling is likely Friday and Saturday; expect highs in the mid-70s to low 80s.

On Sunday, we will see big changes, with increasing showers and cooler temperatures.

“I believe that's most likely later in the afternoon or evening - and yes, that includes the Seahawks game Sunday evening with kickoff at 5:30 p.m.,” said Renner.

Highs Sunday will drop back to the low 70s. Cooler, showery air will linger over the area Monday for showers and sun breaks and highs only in the mid to upper 60s.

Also Sunday, we could see a few isolated thunderstorms over the Cascades.

Check the latest weather with the Seattle Weather App.

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