Area Forecast Discussion
Issued by NWS State College, PA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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
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...



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