Area Forecast Discussion
Issued by NWS State College, PA

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000 FXUS61 KCTP 201813 AFDCTP Area Forecast Discussion National Weather Service State College PA 213 PM EDT Wed Sep 20 2017 .SYNOPSIS... A ridge of high pressure at the surface and aloft will bring warm weather to Pennsylvania through the weekend. && .NEAR TERM /THROUGH TONIGHT/... Clear skies across most of the CWA this afternoon with warm temperatures well above average. Radar shows a few popcorn showers across SW PA and can`t rule out that one of these showers drifts into western Somerset County for the remainder of the afternoon. Clear skies overnight with areas of fog redeveloping in the early morning hours. Low temperatures falling back into the 50s and 60s. && .SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/... Ridge holding strong again Thursday and Thursday night. Look for fog quickly dissipating in the morning followed a sunny and warm afternoon. Areas of fog form again in the early morning hours on Friday. && .LONG TERM /FRIDAY THROUGH TUESDAY/... The overall pattern hasn`t changed much, there is a good overall consensus in the models for the end of the work week. For much of this period, a 590 dam closed 500 hPa high will drift slowly out of the midwest states, and become centered over western PA by late this weekend through early next week. The GEFS forecasts showed this feature as a closed 5880 m ridge over us with near +2 sigma above normal heights which will translate to well above normal temperatures. High temps from Friday through the weekend will be 10-15F above normal with little or no chance of rain until Monday at the very earliest. Lows early each morning will be consistently in the mid and upper 50s across the northern and western mtns, to lower 60s in the larger SE metro areas. Min temps may cool off slightly for this weekend thanks to deep dry air and a light N to NW llvl flow of drier dewpoint air at the sfc. && .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... VFR conditions until pre dawn hours when fog reforms only to dissipate a couple hours after sunrise. Look for this pattern of early morning fog to repeat Thursday night into Friday morning. .Outlook... Thu-Sun...Patchy valley fog possible each morning. Otherwise VFR with generally light winds and minimal clouds. && .CLIMATE... Astronomical Fall/Autumnal Equinox begins at 4:02 PM Friday September 22, 2017. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...Ross NEAR TERM...Ross SHORT TERM...Ross LONG TERM...Ceru/Gartner AVIATION...Ross CLIMATE... is the U.S. government's official web portal to all federal, state and local government web resources and services.