Area Forecast Discussion
Issued by NWS State College, PA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KCTP 171951 AFDCTP Area Forecast Discussion National Weather Service State College PA 251 PM EST Tue Jan 17 2017 .SYNOPSIS...
-- Changed Discussion --
A warm front will lift across the region this evening followed by a cold frontal passage late tonight and early Wednesday. High pressure will follow and bring mainly dry conditions with temperatures several degrees above normal from the middle of the week into the weekend.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
52F and balmy at Somerset at this hour...while areas east of the Allegheny Plateau are stuck in soupy upper 30s with fog and dankness. Doubt much of the east will improve much before cold fropa late tonight scours out the moThe Wednesday morning stratus/stratocu layer will gradually dissipate during the mid to late afternoon hours, as a secondary cfront pushes through and is followed by enhanced deep- layer subsidence and drying, with only slightly cooler air in its wake.ist stable air trapped near the surface. Winds gradually turn westerly behind the system early Wednesday as flow turns more zonal, but no polar air masses in sight so air is barely cold enough to produce a flurry on the trough`s backside. Low stratus and strato cu will combine with the westerly flow of the shallow cooler air to produce some light drizzle (across mainly the west-facing slopes and ridgetops of the Alleghenies) and also areas of ridge- top shrouding fog. Low temps early Wednesday will range from the mid 30s acrs the northern mountains, to the lower 40s in the south.
-- End Changed Discussion --
&& .SHORT TERM /WEDNESDAY/...
-- Changed Discussion --
Gradual improvement is expected as the Wednesday wears on...but it will be a slow process as 5h low drops ESE to the Del Marva by afternoon...helping a secondary front drop across the area to signal improvement in the afternoon. Skies will be mostly cloudy throughout with some brightening mid to late afternoon south central and southeast. Highs will range from the upper 30s north to around 50F southeast.
-- End Changed Discussion --
&& .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... Ridge re-establishes itself over the eastern U.S. for late in the week, as mild SW flow persists over the midwest. Guidance suggests energy will dive south along the west coast eventually helping to strengthen the building upper ridge over the east. We`ll be on the eastern side of this, so subtle shortwaves sliding into the Midwest will bring varying amounts of cloudiness to the west (less in the east) with low end chances for light showers. Another wave approaches/lifts into the OH valley late next weekend into next Monday. Again, temps could be marginal at the start of pcpn overnight Sunday for some ice or snow, but the bulk of pcpn looks to be rain at this point. && .AVIATION /20Z TUESDAY THROUGH SUNDAY/...
-- Changed Discussion --
Widespread MVFR to IFR conditions expected through tonight with periods of rain becoming more showery into Wednesday morning. Pockets of -fzra remain possible across the northern airspace thru 15z but marginal surface temperatures should limit icing impact. Outlook... Wed...MVFR/IFR west; MVFR to VFR central-southeast. Rain showers west ending Wed ngt. Thu...No sig wx. Fri...Sub-VFR possible with rain moving SW-NE. Sat...No sig wx. Sun...No sig wx.
-- End Changed Discussion --
&& .CTP WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...DeVoir NEAR TERM...DeVoir SHORT TERM...DeVoir LONG TERM... AVIATION...DeVoir

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.