Dry weather with warming temperatures highlight the rest of the week and into the weekend, with a mix of sun and high clouds and limited thunderstorm chances. A large ridge of high pressure is building off the Pacific coast this morning and its axis will gradually move into the Cascades by tonight. Clouds spilling over the region will retreat east and thin early, leaving mostly sunny conditions by this afternoon and evening. Expect afternoon highs in the Wenatchee Valley today to top out around 90 degrees.
Overnight into Wednesday the ridge axis shifts toward the Northern Rockies and the weather flow turns southwest, opening the door for another increase in high clouds from the west. Temperatures will continue to surge above normal again tomorrow and on Thursday. Wednesday highs across Northcentral Washington will be 10-15 above normal as the ridge builds right over the top of the Inland Northwest, with upper temperatures in the upper 80s to mid-90s. The Cascades and deeper Columbia Basin will be near record values both Wednesday and Thursday. Wednesday night lows will be held about 10-13 above normal too, with lows in the upper 50s to upper 60s as clouds come in to hold the heat in.
The strong upper ridge flattens a bit on Thursday as a weak shortwave weather system passes through Northcentral Washington. The Wenatchee Valley can expect mostly sunny skies and windy conditions Thursday out of the west 15-20 mph with gusts to 30 mph, highs in the lower 90’s. The hot, dry weather with windy conditions Thursday will increase fire weather concerns especially across grass/brush surfaces.
A flatter ridge will likely prevail Friday into the weekend through early next week. This will likely bring continued warmer than normal weather, though not as warm as Wednesday and Thursday this week. We will see sunny to mostly sunny skies in the Wenatchee Valley Friday through the weekend with afternoon high temperatures near 90 degrees and overnight lows in the lower to mid-60’s.