Updated Saturday at 11:40 p.m.
Well...it's a holiday weekend, so we're seeing the usual in place in Western Washington: cool clouds, a light wind, rain at times...the typical trifecta to make you think twice about your picnic and bbq plans. But don't cancel the corn on the cob just yet, we'll get some sunny redemption before this long weekend is through. We just have to exercise a *bit* more patience...
The last of the cool, wet May disturbances is kicking through overnight. (Blue tarp camping, anyone? I feel for anyone roughing it around the Northwest at the moment). Cloudy skies will drop more rain at times into Sunday morning, and lows will drop off to about 50 degrees. After that, we start to turn the corner! Sunday afternoon will be a transition point between the unusually cool and damp weather we've had, to a little heat wave on deck for next week. We'll see lingering showers during the afternoon, and highs will make it into the middle 60s. By evening, we should start to clear out...a sign of things to come.
Memorial Day on Monday will be lovely. With building high pressure serving to clear us out, partly to mostly sunny skies will carry us to about 70 degrees. It will be a great afternoon for taking in the Mariners game, heading to Folklife at Seattle Center, or just honoring those who have served with an American style family outing.
After that, the heat just keeps on keeping on. The upper high will join forces with a building thermal trough (read: hot, dry pool of air taking a trip up the coastal highway from California) to push our temperatures ever higher. By back-to-work and school Tuesday, we'll close in on 80, and by Wednesday and Thursday, highs will make it well into the 80s near I-5, with plentiful 90s by the Cascade foothill communities.
For yet another twist in the plot, a gang of thundershowers rolls up the Cascade crest by Thursday, introducing a bit of a muggy feel to the Sound by the afternoon. Most of the lightning show should stay over the mountains, but there's always a chance we could see a thunderboomer wander into the lower terrain, too.
A stronger marine influence brings in cooler air from the Pacific come Friday, eroding our heat some and bringing in some morning clouds. Highs late in the week and into next weekend should settle back into the 70s.
In the meantime, I hope you enjoy this weekend.
Meteorologist Shannon O'Donnell
The KOMO4 Forecast Team
Today's Record Temperatures