Area Forecast Discussion
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FXUS61 KPBZ 241928
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
228 PM EST Tue Jan 24 2017

.SYNOPSIS...
Temperatures will remain well above the seasonal averages tonight
and Wednesday, then a Thursday cold front will bring colder
temperatures and snow showers through the weekend.

&&

.NEAR TERM /THROUGH WEDNESDAY/...
Last of light rain and snow showers will diminish this evening as
low pressure moves offshore of New England. No real cold advection
behind the system, and with stratus remaining across the region
tonight min temperatures will fall little from evening readings.

Warm advection ahead of an approaching cold front will push
temperatures into the 40s north and 50s south Wednesday. Scattered
rain showers will develop mainly in the afternoon, as a lead
shortwave races east ahead of the approaching cold front.

&&

.SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/...
Cold front will cross the region Thursday morning with rain
showers Wednesday night mixing with and changing to snow showers
Thursday. Cold advection will continue in northwest flow through
Friday, with a reinforcing shortwave and cold front approaching on
Friday. Temperatures will fall to near the seasonal averages or a
bit below.


&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
Northwest flow aloft will continue to feed fast moving shortwaves
across the region through the weekend, with seasonably cold
temperatures and snow showers. A model blend was used with a
broad brush for POPs due to timing issues. By Monday mid level
flow will flatten somewhat ahead of a shortwave approaching the
Great Lakes, allowing for a mainly dry day Monday. Low chance POPs
were included for Tuesday ahead of an approaching front.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
IFR to low MVFR conditions are expected to persist through
Wednesday morning as low level moisture behind exiting low
pressure maintains a stratus layer. Ridging should return VFR
conditions to the area Wednesday, though ports N of I 80 could see
MVFR continue until just after the end of the TAF period.

.OUTLOOK...
Periodic restrictions are expected Wed night through Sun with a
crossing cold front and subsequent upper troughing.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...None.
OH...None.
PA...None.
WV...None.

&&

$$



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