Many of you will need umbrellas during the next week. And perhaps a lightning rod.
A dramatic plume of moisture will be heading into the Northwest from the south.
Southwest Monsoon moisture will be entering our region, and our chances of breaking any dry spell records are dimming fast.
The latest water vapor satellite image shows the impressive moisture plume over the Southwest---and it is heading our way.
Let me start by showing you the latest precipitation forecasts from the UW WRF model. For the 72 hours ending 5 PM Tuesday, the interior gets wetted down well, with some favored locations enjoying over an inch of rain. This precipitation is from the plume of moisture from the southwest U.S.
So we will go from extreme heat to extreme moisture in a little over a month!
This moist air will be relatively unstable, which means a good chance of thunderstorms east of the Cascade crest. The simulated infrared satellite image on Saturday night suggests a number of storms in eastern Oregon (see below). Thunderstorms can bring needed rain, but they can also start wildfires.
Reminder: new podcast tomorrow morning. Perhaps it is time to talk about Northwest thunderstorms!