Philly Weekend Weekend Weather Update

Advancing moisture aloft with cirrocumulus undulatus
Advancing moisture aloft with cirrocumulus undulatus

Latest NAM and GFS models similar in having the remnants of what was tropical storm Bill move directly over our area for Saturday night into Sunday morning.  Both models crank out about 2 inches of rain with the heavy rain falling after midnight Saturday into daybreak Sunday.

It’s not surprising that the NWS issued a flash flood watch for this time period.

It appears that Saturday will start dry, but showers and thunderstorms develop late afternoon and become progressively heavier during Saturday night.

See my earlier forecast for other details.