Area Forecast Discussion
Issued by NWS -- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
FXUS61 KPBZ 260948
Area Forecast Discussion
National Weather Service Pittsburgh PA
448 AM EST Sun Feb 26 2017
High pressure will build in today ending the flurries and snow
showers. Rain chances return with a weak crossing disturbance
Monday, and with a Tuesday warm front. A late Wednesday cold
front will return wintry weather for the last half of the week.
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Broad mid and upper troughing, cold advection and lake/terrain
enhancement should continue to result in light flurries and
snow showers early this morning. Building high pressure and
backing flow should end this precip later this morning. A
clearing trend is also expected today under the building high.
Highs are expected to be near or just below the seasonal
.SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY/...
A weak shortwave is progged to cross the OH and TN Valley
regions late tonight and Monday. This wave and warm advection
could result in some light rain, or possibly a brief period of
light snow at the onset. Maintained chance pops as confidence in
precip occurrence is limited.
A warm front is progged to lift north across the region late
Monday night and Tuesday with better shower chances. Periods of
showers are then expected through Wednesday as several
shortwaves cross the area in SW flow ahead of a deepening upper
trough and surface low across the Midwest. The low`s associated
cold front is expected to advance across the area by late
Wednesday. Moderating temperatures are expected each day, with
readings around 20 degrees above average by mid week.
.LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/...
Broad upper troughing is progged to set up through late week.
This along with lake and terrain enhancement should keep snow
shower chances in the forecast. A reinforcing trough on Friday
could result in a period of steady snow for some areas. The
trough is expected to shift E of the area by Saturday with
ridging building in. Below average temperatures are expected
through the period. Used manually modified Superblend guidance
to account for uncertainty and model differences, with a
downward adjustment to temperatures late week in cold
.AVIATION /10Z SUNDAY THROUGH THURSDAY/...
Low VFR cigs and intermittent light snow showers will continue
through mid-morning before cloud coverage decreases as high
pressure builds in from the west.
Restrictions will be possible again Tuesday morning as the next
weather system impacts the region.