WPC has initiated Key Messages for an impending coastal storm that will look to generate strong wind gusts, heavy rainfall, and significant coastal impacts that include coastal flooding, rip currents, and beach erosion along portions of the East Coast over the upcoming weekend.

Highly unusual situation approaching western Colorado with the moisture from Hurricane Priscilla. Grand Junction has never had precipitable water over an inch (25mm) so late in the year, but looks like it will be near that level on both Fri & Sat. Six standard deviations above average! #cowx 1/2

2.39” in the gauge from this evening’s downpour. #MDwx

Think it’s been especially humid in the DMV lately? You’d be right. Avg dew point (computed by averaging daily max/min dew point) at the three major climate sites (BWI/DCA/IAD) for July 2025 thru today all top 2 on record, and BWI is #1. Yuck. Made via mesonet.agron.iastate.edu/plotting/auto/ # 140

WPC issued as many as six MPDs for the deadly flash flooding in the TX Hill Country starting yesterday evening and lasting through much of today. The first MPD generally set the stage for what was to come, while the next three shown were as the event unfolded.

69 degree dew point this morning. #nice

We often (rightly) see maps like these showing how good SPC convective outlooks are; let's also give some kudos to WPC for some outstanding excessive rainfall outlooks for this event. Especially impressive are the day 5 outlooks, giving advance notice of prolonged excessive rainfall and flood risk.