824 FXUS61 KCTP 090040 AFDCTPArea Forecast Discussion National Weather Service State College PA 840 PM EDT Wed Oct 8 2025
.SYNOPSIS... * Sunny but crisp conditions through late week * Frost/freeze conditions tonight and Thursday night could end the growing season in some parts of central PA * Increasing odds for cloudy/wet/windy weather Sunday into Monday particularly across the eastern part of the forecast area
&&
.NEAR TERM /THROUGH THURSDAY/... Looking at clear skies overnight, as a large high pressure system builds southward from southern Canada.
Frost and freeze products look ok, just updated the statement. Limiting factor will be a very slight wind overnight.
Earlier discussion below.
A seasonably strong +2SD 1030mb high pressure dome will migrate over the eastern Great Lakes and continue to direct crisp and chilly Fall air into CPA. Frost/freeze headlines remain unchanged over the northern and western Alleghenies. Some consideration was given toward adding counties along I-99 where the usually colder valleys could wake up to areas of frost early Thursday morning. Min temps in 30-45F range anywhere from 1-2 to 5-8 degrees below climo; however the 24hr change is a bit more impressive at 15 to 25 degrees lower (colder) vs. last night.
&&
.SHORT TERM /THURSDAY NIGHT THROUGH FRIDAY NIGHT/... Thursday looks to be the coldest day of the week, even with plenty of sunshine. Thursday night will be a bit colder than tonight, as there will be next to no wind. Also cooler on Thursday than today. Freeze watch continues for much of the area. Anyway, no chance to this part of the package.
Earlier discussion below.
Chilly start followed by abundant sunshine, lighter winds, and the first cooler-than-average day in some time. Max temps will be 5-10 degrees below the historical average for early October making for a crisp, cool Autumn feel with low humidity.
1030+mb high pressure dome with PW
NWS CTP Office Area Forecast Discussion