A cool and dry Canadian weather front has settled into the region and will deliver a good dose of vitamin D along with chilly temperatures over the next few days. But, a slow warming trend is on the horizon. A large scale upper-level ridge of high pressure is slowly working its way toward the Washington Coast today and will move into Central Washington on Friday. Currently, this places Northcentral Washington under a dry, northerly flow which has allowed a cool and very dry continental air mass to move into our neck of the woods. Strong radiational cooling the next few nights will mean morning temperatures will start off in the teens and twenties and only rebound into the 40’s and 50’s each afternoon. Wenatchee set an overnight low record this morning at 27 degrees breaking the old record of 30 set in 1985. Afternoon highs will be on the order of 12 to 15 degrees below normal. Winds the next few days will be light with speeds under 10 mph. So, for today, the Wenatchee Valley, Okanogan Valley and Columbia Basin can expect sunny skies, calm wind and afternoon high temperatures in the lower 50’s.
A slow warm-up begins on Friday with lots of sunshine and highs in the mid to upper 50’s.
As we get to the weekend on Saturday, expect variable clouds and warmer temperatures with high temperatures in the upper 50’s to lower 60’s. Much the same for our Sunday weather forecast with mostly sunny skies and highs near 60 degrees.
By Monday afternoon high pressure will once again build into the region for mainly dry conditions through Tuesday afternoon with highs once again near 60.
The next upstream weather system arrives Tuesday night with a 20% chance of showers. That goes up to 30% on Wednesday with afternoon highs near 60 degrees.