514 FXUS61 KCTP 112231 AFDCTPArea Forecast Discussion National Weather Service State College PA 631 PM EDT Thu Sep 11 2025
.SYNOPSIS... * A predominantly rain-free stretch of seasonable weather continues across central Pennsylvania with increasingly warm days and comfortably cool nights into the middle of next week.
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.NEAR TERM /THROUGH FRIDAY/... High pressure remains. Diurnal cu popped over the ridges and are currently a little congested in the srn mtns. However, dry air can be seen entraining and is starting to diminish those cu. Everyone will get rid of their cu at or before sunset. The wind will die off and the temps will again drop cool enough to make valley fog in the usual spots of the nrn and central mtns. Temps will be about 10F cooler tonight over the SE without the clouds they had last night. But, most other places will not drop as low as they did last night. Mins should hit the 40s N and 50-55F elsewhere.
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.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/... Meet the new forecast. Same as the old forecast. Dry. Cumulus will be the most exciting weather phenomenon on Fri and Sat, too. The E should have more than the W on Fri. Light SE flow on Sat may bring some lower clouds in from the east by morning. These will most likely mix away, at least partially. Temps... slowly warming both overnight and during the daytimes. Fri maxes generally 75-80F with L80s in the srn valleys. Sat maxes of nearly 90F are possible in srn Franklin Co. Even the valleys of the nrn mtns could hit 80F. The overall dryness of the airmass is also notable. MinRH in the 30s will make you thirsty quickly. Be prepared for the unusual heat and low humidity and sunshine if you plan to be outside on Sat. Red flag/fire weather conditions are not expected with RH above 30% each aftn for most of the area and wind very light as we sit under the sfc high pressure ridge.
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.LONG TERM /SUNDAY THROUGH THURSDAY/... A dry front will be arriving on Sunday, and there is still a far outside chance (
NWS CTP Office Area Forecast Discussion