Our current weather picture is showing a cold front dropping down from the north while an area of upper level low pressure moves slightly inland from the Pacific Coast. This will result in convergence between the front dropping down from the north and the southerly flow on the east edge of the low. Combine this convergence with the moist and unstable air mass expected over Northcentral Washington this afternoon and expectation is a good chance of slow moving thunderstorm development (5 mph or less), primarily over the East Slopes of the North Cascades, the Okanogan Highlands and a bit to the south and east in and around the Wenatchee Valley. As there are a number of moderate and high-risk burn scars in some of those locations a flash flood watch will be issued from 11:00 a.m. to 11:00 p.m. to address the risk of flash flood conditions on and near burn scars there. The Wenatchee Valley can expect mostly cloudy skies today with a 30-40% chance of showers and thunderstorms, highs today in the upper 70’s to near 80 degrees.
On Wednesday, the weather system from today will move east leaving us with sunny skies, light winds and mild high temperatures into the lower 80’s.
For Independence Day Thursday, the majority of the Inland Northwest looks dry with near average temperatures. Northcentral Washington will enjoy mostly sunny skies with afternoon high temperatures in the lower to mid-80’s.
Friday through Monday, there is decent agreement between weather models and their respective ensembles that the Pacific Northwest will remain under the influence of an upper level area of high pressure slowly pivoting across the region Friday through the weekend. Expect mostly sunny days and partly cloudy nights through the weekend with afternoon high temperatures in the mid 80’s with overnight lows around 60 degrees.