Updated Monday 5:10 p.m.
Did you start out with straight hair today, only to see it slowly turn curly...? Feel an achiness in your joints that you're usually able to ignore..? Welcome to a muggy Monday in August, at least by Northwest standards. While we had highs in the 90s on Saturday, our humidity during that particular afternoon dropped down between 15 and 25%. By contrast, our highs today were barely in the 80s, but relative humidity topped 50% in some locations around Puget Sound during the peak afternoon heat.
The sticky feel is due to moisture streaming into Eastern Washington (we just have the high cloudiness along I-5...a more filtered sunshine effect compared to the bright blue skies of Seafair weekend). Much-needed rain is falling from Omak to Pullman. It won't amount to much, but any precipitation is helpful in quelling our high summer fire danger.
On this side of the mountains, the marine layer is starting to grow and take shape at the ocean beaches. That low overcast will push inland overnight, and most of us will wake up to a blanket of gray by dawn. Early lows will drop into the 50s, and a few lucky gardens may pull down some drizzle on their dahlias.
We'll enjoy afternoon clearing, but only in time to top out in the 70s on Tuesday--much more in line with what we're used to seeing around here in early August. Wednesday will be similar as an upper trough of low pressure slides over the top of us. It may even drop a few light showers on the coast or the Cascades as it travels by.
A small warm-up returns later in the week, so look for a bump into the low 80s with mostly sunny skies by Thursday and Friday.
Next weekend is still promising further cooling, with highs in the upper 70s Saturday and lower 70s Sunday. Some models are indicating a good shot at shower action by Sunday afternoon.
Have a great night,
Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team