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

000
FXUS61 KPBZ 220510 AAC
AFDPBZ

Area Forecast Discussion...UPDATED
National Weather Service Pittsburgh PA
110 AM EDT Wed Aug 22 2018

.SYNOPSIS...
An upper level disturbance will lead to scattered showers
today before high pressure builds into the region late in the
week.

&&

.NEAR TERM /THROUGH TODAY/...
Cold front will slowly cross the area overnight. Line of showers
is advancing eastward ahead of the surface boundary and would
expect this to continue. Have based overnight PoPs on the track
of the front, which will clear the entire area before dawn.

Although the front will exit to the east, plenty of residual
moisture will lag behind today, allowing for the development of
cold-advection showers today. Low-level lapse rates will
rapidly steepen today and another shortwave trough will swing
through. Thunderstorms cannot be ruled out today, with
impressive cooling aloft and some modest surface
destabilization. With sustained cloud cover and episodic
showers, temperature will struggle to climb into the 70s.

&&

.SHORT TERM /TONIGHT THROUGH FRIDAY/...
As high pressure builds tonight night and Thu, moisture will
erode and rain chances evaporate. Amid this building high
pressure, general sun is expected, but temperature will reach
only into the mid 70s on Thu.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
Temperature will recover toward seasonal average by the weekend
as a flat upper ridge builds nwd slowly. But an active belt of
stronger mid-level flow nwd of the ridge will be found in the
Ohio Valley, which could promote active weather Sat/Sun/Mon
pending any shortwave troughs embedded in that flow.

&&

.AVIATION /05Z WEDNESDAY THROUGH SUNDAY/...
MVFR cigs are through much of the forecast with a crossing
upper trough. This trough should also result in sct showers. VFR
is expected to return by late aftn/eve as sfc high pressure
begins to build in.

Outlook...
Restrictions are possible with a weak weekend trough.

&&

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

&&

$$

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