textproduct: State College

WHAT HAS CHANGED

* Forecast rolling along nicely.

KEY MESSAGES

1) Period of light rain will gradually diminish and move away from PA tonight and Wed. Coastal storm effects still look like they will stay mainly east of PA.

DISCUSSION

KEY MESSAGE 1: Period of light rain will gradually diminish and move away from PA tonight and Wed. Coastal storm effects still look like they will stay mainly east of PA.

High pressure and drier air moving down from the north will start to dominate the forecast for the next 7 days. Lingering SHRA over the southern tier tonight will pose no heavy rain threat. Any RA left over in the morning could be entirely south of the CWA. We'll start to see high clouds from the coastal low on Friday or even before then. We are leaving in the NBM 20 PoPs for the east for the weekend for places E of the Susq R without any confidence to totally drop mentions of it. Some early AM river valley fog is likely thru the period as our dewpoints never get all that dry and the min temps will start to dip into the upper 30s in the usual cold spots.

AVIATION /19Z TUESDAY THROUGH SUNDAY/

Periods of rain and showers will continue primarily across the southern 2/3rds of the Commonwealth through tonight and into early Wednesday morning, with areas of -RA/RA that could cause visibility restrictions and lower ceilings over the terminals of JST, AOO, MDT, and LNS. A period of prevailing MVFR restrictions is likely across all western terminals. Periods of IFR to briefly LIFR are most favored across the south-central mountains (KJST/KAOO/KUNV) where easterly sfc flow across terrain + steadiest rainfall look to overlap later tonight.

Flight conditions across the eastern and southeastern airfields have improved to VFR with only very light rain still expected to occur through the afternoon. These sites will likely remain VFR through the overnight hours and into Wednesday before clouds will begin to scatter out by late Wednesday morning and into the afternoon. Clear skies or very few high clouds will be prevailing across all of central Pennsylvania by 18Z Wednesday.

Outlook...

Wed-Thu...Trending VFR across central PA, with slower improvements possible over the Laurels and Lower Susquehanna Valley where -SHRA/BR and low cloud ceilings may linger.

Fri-Sat...VFR favored as a developing coastal low looks to bring subsidence overhead, though -RA and lower cloud ceilings associated with this system may reach our eastern terminals.

CLIMATE

Astronomical fall begins today, September 22, 2026, at 8:04PM EDT. This marks the time of the autumnal equinox when the sun is directly above Earth's equator.

CTP WATCHES/WARNINGS/ADVISORIES

None.