276 FXUS61 KCTP 121506 AFDCTPArea Forecast Discussion National Weather Service State College PA 1106 AM EDT Sun Oct 12 2025
.SYNOPSIS... * Periods of rain into Monday night, mainly across the eastern half of the CWA * Becoming breezy in southeast PA * High pressure brings cooler and dry weather for the rest of the week.
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.NEAR TERM /UNTIL 6 PM THIS EVENING/... One band of rain is crossing the CWA and has made 2/3rds of the CWA wet already. It should continue moving westward and make the western mountains wet, too. However, the next wave of forcing to drive organized rainfall/showers will have a big gap for most of the day today. Light rain may push in from the east again later today, but hardly reach I-99 before falling apart. There won`t be many breaks in the clouds, the temps will be rather flat through the day, only getting into the 60-65F range in most places. Hill tops and the far SE will be closer to 60F while Warren Co with it`s corner on sunshine today could take a run at 70F.
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.SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/... The double-barrel upper low over the eastern states will gradually merge into one, broad upper low/trough. The coastal low position and strength is dependent on the eventual upper pattern. That solution is still rather uncertain, especially considering the short-range/time-horizon. Despite this uncertainty, there aren`t many implications for our CWA from any solution out there now. Light to moderate rain at times in the east, and perhaps no more rain for our western tier of counties. While the storm total QPF in the 1-1.25" range over the east means little to the streams and rivers. None of it will be heavy enough to cause any problems. But, I am sure it is all very welcome to the parched earth of Central PA. The bad things is that the most-dry section of our CWA (the W, esp the NW) is going to pick up very little rain (maybe less than a tenth of an inch) from this lingering/long-duration storm along/off the coast. Temps remain mild tonight, but get a bit chillier on Monday with more moisture overhead and falling from the sky vs Sunday. The Poconos/Endless Mountains of the NE could stay in the lower 50s. Warren Co will be the hottest place in the CWA once again. Highs there may again be close to 70F. The rain is progged to be a little faster to end on Monday night, and is no longer expected to last into Tuesday. Chance (30-40) PoPs will be confined to places east of the Susq Monday night.
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.LONG TERM /TUESDAY THROUGH SATURDAY/... Dry until Day 7. While there is a colder airmass moving down from Canada in the middle of the week, the front/leading edge of the it will have almost no moisture to lift and squeeze out as rain. If there is a sprinkle or two on Tues night, it would be along the NY border. The dryness will peak on Thursday with dewpoints only 25-35F in the aftn. The wind could be fast/gusty enough to create a worry for our fire-weather sensitive partners. But, we`ll have a few days to look into those conditions. It will also be dry/clear enough to cause frost/freeze conditions for the SE, mainly on Friday morning.
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.AVIATION /14Z SUNDAY THROUGH THURSDAY/... Most Central and Eastern PA TAF sites will see a several to 6 or 7 hour break from MVFR to IFR conditions (and head into VFR) as a zone of deep layer subsidence develops with the slow approach of the thermally direct, left entrance region of an upper level jetlet that was stretched from Ncent PA to Northern New England.
Lowest cigs will remain across the Western Mtns where current IFR cigs should improve to MVFR for much of the afternoon.
All airfields will drop quickly back through MVFR early this evening with areas of IFR later tonight into Monday.
Low level wind shear was noted through the mid morning hours, particularly across the east where gusts from the ENE didn`t mix to the sfc until 14Z. LLWS will subside for the afternoon before developing once again overnight. Wind gusts up to 30 kts are expected around LNS this afternoon.
Rain chances increase once again across the southeast this evening and tonight, peaking early Monday morning. Rain will generally be light. Cigs will also lower to MVFR/IFR during this timeframe.
Outlook... Mon...Still breezy in NE flow with rain chances continuing across the east.
Tue...A little less breezy as the wind switches to North and skies begin to clear.
Wed...A chance for restrictions mainly early/north with cold front, otherwise VFR and becoming breezy.
Thu...VFR.
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.CTP WATCHES/WARNINGS/ADVISORIES... None.
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SYNOPSIS...Dangelo NEAR TERM...Dangelo SHORT TERM...Dangelo LONG TERM...Dangelo/Steinbugl AVIATION...Lambert
NWS CTP Office Area Forecast Discussion