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NWS Area Weather Forecast Discussion
County Warning Area [CWA]: PBZ
Regional NWS Weather Office: Pittsburgh, PA

FXUS61 KPBZ 230905

Area Forecast Discussion
National Weather Service Pittsburgh PA
405 AM EST Sun Jan 23 2022

A quick-moving clipper system will bring 1 to 4 inches of snow to the
area today. A second system will bring another round of light snow to
the area Monday afternoon into Tuesday.


A fast-moving clipper system will cross out of the Midwest into the
Upper Ohio Valley today. Recent guidance has trended farther north
with the axis of greatest snowfall, so in collaboration with
neighboring offices, have expanded the Winter Weather Advisory
northwards, despite lacking advisory-level snow in some locations.

There is also some concern that forecast totals/snow ratios may be
too high, especially south of Pittsburgh where hi-res guidance
signals a sharp cutoff in snow amounts. For now, have kept the
Advisory going for these areas in collaboration with neighbors, but
this may need to be amended pending additional guidance. Regardless,
generally 1-4 inches of snow is expected across the area today, with
greatest amounts focused north and west of Pittsburgh.

Snow will enter the area from the west later this morning, beginning
across Pittsburgh by around the noon hour. Snow will rapidly come to
an end from west to east later afternoon through early evening,
pushing southeast of the Pittsburgh area by around 00z. Snow may
linger across the higher terrain of WV through the early overnight.

With fresh snow on the ground and renewed cold advection,
temperatures will drop into the single digits to lower teens across
the area tonight.


Briefly dry weather with zonal flow returns on Monday as temperatures
moderate to above-freezing south of I-80. Then, a second clipper
system will bring a another round of light snowfall to the area
Monday afternoon/night. Lake enhanced snowfall will linger into
Tuesday with persistent NW flow behind the cold front. At this time,
totals generally range from 1-3 inches, with greatest totals north
of PIT and along the higher terrain. Lake-enhanced snow showers may
linger into the Tuesday overnight north of I-80, but most additional
accumulation should remain north of the forecast area.

Temperatures will fall through the afternoon on Tuesday with strong
post-frontal cold advection. Tuesday night will see lows back in the
single digits areawide.


Building sfc high pressure and reinforced NE CONUS troughing will
keep mainly dry and well below-normal temperature weather in the
forecast for the second half of the work week. Low temperatures
Wednesday night may come close or rival those of yesterday (Saturday)
morning for coldest of the season. The next chance for snow will come
Friday with a crossing wave. Drier weather returns for the weekend.


Low pressure advancing from the NW will result in eventual IFR late
this morning and into the evening hours, with light snow and lowered
vis for all ports. Gradual improvement is expected later in the
evening, though CIGs may remain at or near MVFR heights through
Sunday night.

Restrictions in snow are likely through mid-week with a fast moving
low pressure system.


PA...Winter Weather Advisory from 7 AM this morning to 7 PM EST this
     evening for PAZ007>009-013>016-020>023-029-031-073>076.
OH...Winter Weather Advisory from 7 AM this morning to 7 PM EST this
     evening for OHZ039>041-048>050-057>059-068-069.
WV...Winter Weather Advisory from 7 AM this morning to 7 PM EST this
     evening for WVZ001>004-012-021-509>514.



Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather