887 FXUS61 KCTP 081927 AFDCTPArea Forecast Discussion National Weather Service State College PA 327 PM EDT Wed Oct 8 2025
.SYNOPSIS... * Crisp and seasonable Fall 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 TONIGHT/... Instability cu should crumble with the loss of daytime heating through the evening, giving way to clear skies overnight. 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 THROUGH FRIDAY NIGHT/... 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