Brief Update Wed 08:55 AM — Model-predicted high temperatures in the Philadelphia area on Friday are trending warmer- a summer-like Friday! High temps most likely in the mid 80s with dew points in the 60s.
Truly summer-like weather after these unseasonably chilly past few days! It will be breezy and increasingly windy/gusty later in the afternoon.
A cold front approaches later Friday afternoon with showers and thunderstorms moving from northwest to southeast. Current predicted time frame for the showers/thunderstorms is 4 -7 pm for the immediate PHL area (NAM) but closer to 9 PM (GFS)
Brief Update: The 2 PM (18z) model runs are coming in. Here are the trends—
The storm can best be seen as coming in three parts:
Heavy rain starts 5-6 PM (Blue Bell) and moves out quicker than previously forecast. High winds peak about 8PM. Rain tapers off after 9-10 PM. QPF is down to about 1 inch
Isolated, possibly heavy, thunderstorms again between midnight and 3 AM.
On Friday, upper low combines with surface low pressure over us. Additional heavy rain/thunderstorms morning and early afternoon. Additional 1 inch of rain possible Less wind.
