Philadelphia Weather Outlook

THIS WEEK’S WEATHER

Hurricane Ian has its own web page. Click here.

Update Fri 09/30 @ 8:55 AM —Updated the Tropical Storm Ian page with weekend outlook and change in timing and amount of rain.

Update Tue 09/27 @ 6:08 PM — (Updated Hurricane Ian page) We continue to be a northerly flow of dry air through Friday. We may begin to see some high clouds associated with Ian Friday.

The latest ECMWF shows some rain for us by Saturday afternoon from Ian.

Latest ECMWF forecast for Saturday at 2 PM. Rain moves in from Ian. (Click on image for a larger view.)

Previously Posted Mon 9:32 PM —

Our weather this week will be influenced by an upper air trough bringing continued cooler, temperatures. Current seasonal average highs are 70-72º. We’ll be seeing upper 60s over the next two days.

Water Vapor image shows jet stream level winds and the position of upper level systems. The trough over the eastern part of the country will combine with a southerly flow over the Carolinas and Georgia to influence the movement of Hurricane Ian. (Click on image for a larger view.)

This corresponds to the current depiction of the NAEFS—

NAEFS current conditions Monday evening (Click on image for a larger view.)

The remnants of Hurricane Ian will affect us later in the week and more likely, during the weekend. I’ll be following the models.

Current indications, based on the GFS, ECMWF and ICON models, suggest that the bulk of the rain associated with this storm will move just to our south late Saturday into Sunday. With hurricanes, anything can happen and changes are likely. Stay tuned