Area Forecast Discussion

Pittsburgh, PA

Forecast Discussion for PBZ NWS Office
191
FXUS61 KPBZ 200511 AAC
AFDPBZ

Area Forecast Discussion...UPDATED
National Weather Service Pittsburgh PA
111 AM EDT Wed Sep 20 2017

.SYNOPSIS...
A scattered shower or storm is possible south and west of
Pittsburgh this afternoon. Warm and humid conditions will
continue into early next week.

&&

.NEAR TERM /THROUGH TODAY/...
No major changes to the overnight period.

Short wave trough will remain to the west of most of the region
today, stretching from Western Lake Erie southward through
Central/Western Ohio and into Kentucky. This large scale
ascension and a modestly unstable atmosphere, may be enough to
fire scattered showers and storms this afternoon. Warm mid
levels and subsidence should keep activity suppressed to the
east of the trough. Another warm day with temperatures well
above normal.

&&

.SHORT TERM /TONIGHT THROUGH FRIDAY/...
Shortwave will phase out tonight as upper level heights begin to
rise in earnest. Upper level ridging will become even more
firmly entrenched over the Ohio Valley/Great Lakes through the
end of the week as a deep trough digs over the Western U.S..
This will lead to dry weather and further warming through
Friday. Highs in the mid 80s will be common.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
Little change in the large-scale circulation pattern is expected
during the extended period, with the western trough/eastern
ridge setup maintaining, if not strengthening, through early
next week. As a result, a dry and quite warm forecast continues.
With 850mb temps soaring to the 17-19C range, most locations
outside of the ridges will rise well into the 80s.

&&

.AVIATION /05Z WEDNESDAY THROUGH SUNDAY/...
Fog development possible as has been the case for several
nights, however, cloud coverage along and west of the PA/OH
border will limit development over those areas.
AGC/FKL/DUJ/MGW/LBE should see IFR vis restrictions develop
again overnight under limited cloud coverage.

.Outlook...
Other than local morning fog, no widespread restrictions
expected through Sun with building ridging.

&&

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

&&

$$

NWS PBZ Office Area Forecast Discussion