Puget Sound Forecast: Mostly sunny skies. Highs in the mid to upper 70s along shorelines, and the mid to upper 80's inland-generally 5 to 10 more miles inland.
Coast Forecast: Mostly sunny skies. Highs in the upper 60's to mid 70's. Northwest winds 5-15 mph.
Mountain Forecast: Partly to mostly sunny; clouds will be most likely to develop during the afternoon hours, especially south of Snoqualmie pass-there is only a slight chance of an afternoon thundershower. Freezing level 14,000'. Pass highs in the upper 70's to low 80's. Pass winds west-northwest 5-15 mph.
Eastern Washington Forecast: Mostly sunny and hot. Highs in the mid 90s to low 100s.
The general pattern for western Washington will remain dry. That won't be true of the Cascades and eastern Washington, especially Friday into the weekend. Although the ridge of high pressure will keep the jet stream well north, it will also allow what we call the 'summer monsoon' to direct some thundershowers northward from the Rockies and Sierra Nevada into the Cascades and eastern Washington by late this week and into the weekend. Satellite images show the movement of these clouds north into eastern Oregon and Idaho. There were extensive thundershowers with lightning strikes over central and southern Oregon yesterday, mainly over the Cascades and Siskiyous. There's a slight chance the thundershowers could drift into Washington Thursday, but are most likely Friday and Saturday. These thundershowers are likely to have very high bases, which means rain falling out of them will likely evaporate before reaching the ground. That would leave lightning, which of course could set off more fires.
By the way, we've had four consecutive 80+ days...we're likely to have another 6 or 7. Our last run, that ended July 17th, was 13. There is a possibility we could match it. Stay tuned!
Rich Marriott / KING 5 Meteorologist