Area Forecast Discussion
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FXUS61 KPBZ 190532 AAC
Area Forecast Discussion...UPDATED
National Weather Service Pittsburgh PA
132 AM EDT Fri Aug 19 2016
Seasonal temperatures with an isolated shower or thunderstorm
through Saturday. A cold front will bring widespread showers and
thunderstorms Sunday and eventually much lower humidity.
.NEAR TERM /THROUGH TODAY/...
No changes need for overnight period. Have just refreshed
temperatures with a blend of hires guidance.
Moisture will slowly spread back over the region today. A late day
isolated to scattered shower or storm cannot be ruled out, but
lift will be sparse with weak ridging aloft. Temperatures will be
close to seasonal averages.
.SHORT TERM /TONIGHT THROUGH SUNDAY/...
Deep moisture will increase Saturday in southerly flow ahead of
an approaching mid-level trough and cold front. Afternoon chance
POPs Saturday along with increasing humidity. Good model agreement
on strong mid-level trough and cold front Sunday, but settling on
the exact time is still in flux. Boundary will bring widespread
showers and thunderstorms to the region. Still humid Sunday ahead
of the front.
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
High pressure will give cooler and less humid conditions through the
middle of next week. Low confidence toward the end of the period,
as models are still trying to solve the timing and location of the
.AVIATION /06Z FRIDAY THROUGH TUESDAY/...
Convective debris cirrus is currently advecting toward the area
and should cover most sites within the next few hours. This will
likely inhibit temperature falls a bit and prevent substantial fog
development. Still fairly widespread MVFR visibilities are
expected overnight toward sunrise, however stratus should be
prevented and very low visibilities seem unlikely. That said,
abundant sunshine should bring VFR conditions again quickly after
.OUTLOOK /FRIDAY NIGHT THROUGH TUESDAY/...
The next chance for widespread restrictions will come with a
strong cold front Saturday night and Sunday.