9/22 Weather Brief

  • Muggy and cloudy for first official day of fall
  • Flash flood watch from Philly on west
  • Temps in the low 80s
  • Heavy rain moving in late tonight

Surface Chart

Cold front is still pretty far to the west, but upper level trough is kicking up rain in W. PA. They are going to get some training of rain today with high totals.

Radar

Right now not a ton of heavy stuff, but should fall over the same area over and over. This evening we are expecting things to fill in a but with steadier rain in C. Pa.

Forecast Model

The NAM shows a lot of the water vapor transport today will occur in W. PA. The arrows with dark red and oranges colors are zeroing in to our west. That’s what they call an “atmospheric river”, when vapor transport (red and orange shading) and vapor vectors collide over a region.

Rainfall Totals

NWS/SPC bringing in 3″+ of rain for most of western and Central PA. Towards our area, the heaviest looks to come tomorrow morning. This chart below is for any rain today,tomorrow, and lingering showers Friday AM.

High Temps

Low 80s for the city, upper 70s out west. A little warmer than usual but not unexpected given the setup

Severe Weather

Some of the guidance this morning shows an isolated strong storm in the York to Reading area. Overall, NWS/SPC has an increased risk for severe storms closer to the cold front. We are a bit too far east.

Thank you for reading and stay dry!

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