Area Forecast Discussion
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FXUS61 KPBZ 221436
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
1036 AM EDT Mon May 22 2017

.SYNOPSIS...
Drier conditions will return for today and tonight. They will
be short- lived, however, as rain returns Tuesday with the
approach of a storm system. overall it will be a cooler week and
holiday weekend than we have be used to, with daily rain chances
from mid week into Memorial Day.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
The last of the showers have vacated the mountains. Rapid
clearing will take place midday across the region. Dewpoints
have already fallen back into the 40s across eastern Ohio and
that air is heading heading east. H8 temps fall slightly during
the day, however with a high sun angle that should offset
boundary layer cold advection allowing the mercury to reach 70
in most spots.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY/...
As this morning`s system continues eastward tonight, dry air
looks to remain in control. A digging upper low will linger back
toward the Mississippi Valley through mid-week. This will allow
for a southern stream wave to trek up the east coast. However,
the bulk of the moisture with this system will remain suppressed
to our SE. The lone exception to this may be the ridges. PoPs
were maintained here for showers but removed overall elsewhere
as upper ridging looks to maintain sway over the area through at
least Wednesday night.

Temperatures during the period gradually warm through mid-week
then cool thereafter once upper troughing comes into play by
Thursday. Fries

&&

.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
The long wave trough will linger overhead into Thursday night
before gradually pushing off toward New England through the
weekend. Unstable lapse rates with cold mid-level temperatures
will allow for decent rain chances to continue through late in
the work week. Beyond then, northwesterly flow behind the upper
level system combined with weaker waves in northwesterly flow
will keeps this unsettled and cooler into next weekend. Fries

&&

.AVIATION /15Z MONDAY THROUGH FRIDAY/...
Improvement will happen quickly through late-morning as much
drier air moves in.

Southerly winds ahead of the front will shift quickly with the
passage of the front. Surface flow will then generally stay
west-northwesterly through the remainder of the TAF period.

.Outlook...
The next chance for widespread restrictions and precipitation is
expected Wednesday night into Thursday.

&&

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

&&

$$


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