Area Forecast Discussion
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FXUS61 KPBZ 151224
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
824 AM EDT Tue Aug 15 2017

.SYNOPSIS...
Shower areas today will give way to a dry and warm Wednesday.
Rain is likely with a Thursday cold front.

&&

.NEAR TERM /UNTIL 8 PM THIS EVENING/...
Current visible satellite imagery showing variable conditions
across the forecast area. North and west zones are clear, with
valley fog, while mid and high clouds are evident south of
Pittsburgh. These clouds are associated with a southern wave
that is generating showers across the higher terrain. These
showers will continue to taper down as the wave pushes
eastward.

Meanwhile, dynamics associated with a shortwave digging eastward
across the Great Lakes still look to clip the I 80 corridor
this afternoon. Have thus maintained some minimal POPs over
northern, and ridge zones for passage of that feature as per
favorable afternoon timing.

Temperatures will be near average today, but increasing humidity
will make it feel a little more muggy.

&&

.SHORT TERM /8 PM THIS EVENING THROUGH FRIDAY/...
Rising heights via overall shortwave ridging support a dry and warmer
Wednesday forecast. Isolated/slight POPs were maintained for
late Wednesday night as a warm front will be surging northward
in response to deepening low pressure over the Upper MS Valley.

That low is projected to stay well north, but the associated
frontal system is likely to spawn showers and storms on Thursday.

Seasonably warm temperature under the midweek shortwave will be
moderated back toward the average with passage of the Thursday
front.

&&

.LONG TERM /FRIDAY NIGHT THROUGH MONDAY/...
Rain chances are progged to diminish under a slowly progressing
upper trough this weekend. Near average temperature is forecast.

&&

.AVIATION /12Z TUESDAY THROUGH SATURDAY/...
Mid-High clouds will persist through mid-day as a shortwave
crosses the region. Shower coverage should diminish as the wave
moves off to the east. Will keep the VCSH mention at MGW only. MVFR
cigs should improve, with any fog burning off after sunrise. A stray
shower or storm is possible in the vicinity of I-80 this afternoon,
but with low confidence, VCSH has not been added to nearby ports.

Cloud should scatter out, especially along the northwestern edge of
the system this afternoon. Wind should remain light out of the
south.

.Outlook...
Localized early mrng fog psbl thru the week. Widespread restriction
potential returns with a Thu/Fri cold front.

&&

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

&&

$$



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