Mostly clear skies through the morning hours with temperatures starting in the upper 40s in the Tri-Cities area. Upper level low pressure remains in place, centered near San Francisco. This is forecast to continue spinning moisture into the Inland Northwest today and tomorrow.
The moisture from the San Francisco low will likely generate a few thunderstorms in mountainous regions to the south and east of the Columbia Basin this afternoon. Increasing high clouds are possible toward the evening in lowland areas as winds aloft blow the tops of these storms over the Columbia Basin. Isolated thunderstorms are possible in lowland areas between about 18:00 and 00:00 tonight.
Under mostly sunny skies for most of the day, highs will generally be in the mid 80s to near 90° Wednesday afternoon. Unlike Tuesday, which ended up being a bit cooler than forecast due to persistent cloud cover, we should see mostly sunny skies clear through the most efficient hours of the day for daytime heating.
Temperatures begin trending cooler tomorrow with highs near 80°. Much cooler Friday as the San Francisco low sweeps over the Pacific Northwest. Many areas will struggle to get up above 60° that afternoon. Scattered showers with a few thunderstorms are possible as the low moves toward the Canadian Prairies.
Lows for the foreseeable look to be well above freezing. Growers and home gardeners shouldn’t let their guard down just yet, the record latest freeze in the Tri-Cities was May 25, 1904 and into early June for Pendleton.
Conditions trend drier but mostly cloudy skies remain in place during the day Saturday and Sunday. Highs those days are cool, generally in the 60s.
2 Comments
Nice analysis, Mark. I enjoy your blogs. Keep up the great work.
Thank you, I really appreciate it!