Aviation Forecasts and Information Page - NWS State College PA

.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
Cold air aloft, shallow low-level moisture, and northwesterly 
winds continue to fuel lake-effect/upslope snow showers across 
KBFD and KJST this morning, with KUNV and KAOO occasionally 
observing -SN as well. A resurgence in these snow showers 
occurred around 10z, bringing a brief period of IFR visibilities
to KAOO. The NAM and RGEM have been handling the longevity of 
these snow showers relatively well, and are depicting that these
snow showers will slowly taper off through 15z. Periods of MVFR/IFR
visibilities are occurring with these snow showers, which will 
continue until these snow showers taper off later this morning 
and early afternoon.

An MVFR cloud deck persists across much of the Northern Tier and
near the Alleghenies, which will raise and break up as the day 
progresses. During the daytime, sunlight will help to raise 
cloud ceilings and break up this deck of clouds via surface 
heating and boundary layer mixing. VFR is likely across all 
airports by the afternoon/evening, with KBFD and KJST expected 
to improve more gradually due to their proximity to the lakes.

The forecast becomes complex between 00z and 12z as a clipper 
system moves across the Great Lakes and into the Northeast, 
bringing a round of snowfall along the leading edge of the 
system. Model guidance suggests a period of MVFR to IFR 
visibilities late tonight and through tomorrow morning for most 
of our airports, with lower confidence in prevailing IFR across 
KMDT and KLNS as the greatest lift looks to be north of those 
airports.

Outlook...

Tue...MVFR-IFR restrictions possible in snow showers at 
BFD/JST, largely VFR elsewhere.

Wed-Fri...Restrictions possible in rain/snow showers.

Sat...Mainly dry with VFR conditions possible.

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