Cool and unsettled weather continues for another day today before a gradual shift to drier and warmer weather into the upcoming weekend. Northcentral Washington is under the influence of a large area of low pressure aloft which is centered over Western Montana, which will allow shortwaves of energy to rotate down from the north and bring precipitation throughout the afternoon. Across Northcentral Washington today surface based instability will increase bringing a 20% chance of scattered afternoon showers with highs in the mid 70’s. Also, expect northwest winds to increase from the Okanogan Valley and Cascade valleys through the afternoon and early evening with local gusts to 25 mph.
Heading into the weekend on Saturday, the Wenatchee Valley will see mostly sunny skies, lighter winds and daytime temperatures going up by 5 to 10 degrees from Friday, highs in the lower 80’s. A weak weather system moves in on Saturday night, which will lead to a weak push across the Cascades with westerly gap winds increasing Saturday evening with gusts of 30-35 mph possible.
On Sunday through Monday, a zonal flow pattern is expected to setup over the region and last until Tuesday as a low pressure system moves off the Washington coast and shifts the flow from the Southwest. The zonal flow will allow for a fairly quiet period as the cooler Pacific air influences the region. Mostly sunny skies are expected both Sunday and Monday with afternoon high temperatures mainly in the mid 70’s.
For Tuesday through Thursday next week, cool and wet weather is expected to make another visit to the Inland Northwest as yet another weak weather system takes residence over the Pacific Northwest. On Tuesday, sunny skies with highs near 80 degrees while Wednesday we will see a 30% chance of showers with highs in the mid 70’s. Our chance for precipitation goes down to 20% on Thursday with highs then also in the mid 70’s.