The strong, blocking upper ridge of high pressure that has been over the region the past several days will shift east into Alberta through the afternoon. The air mass however remains unseasonably hot and with the all-time temperature records that were set in several locations yesterday, there hasn`t been much relief this morning with temperatures in most Northcentral Washington locations starting off the day in the 80’s. Expect another sweltering, record-setting weather day today as well with sunny skies and afternoon highs between 110-115 degrees.
Northcentral Washington weather for tomorrow will be slightly cooler as the dome of heat slowly treks to the northeast, highs Thursday between 100-105.
A quasi-zonal flow will develop over the Pacific Northwest Friday through the fourth of July weekend as the ridge that brought record breaking heat shifts off to our east. This flow will keep temperatures rather steady but still very warm for Friday, Saturday and Sunday, with highs around the century mark for Moses Lake, Omak and Wenatchee.
A low amplitude trough of low pressure may approach Washington coast early next week. At this point it appears far too dry to produce any precipitation, although it would act to increase winds over our area. This combined with afternoon humidity minimums around 20% would undoubtedly lead to elevated fire weather concerns. That said, cooler temperatures would also accompany this trough.
Weather on Monday and Tuesday will be sunny, breezy and slightly cooler with afternoon highs in the upper 90’s.