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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KPBZ 240414
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
1214 AM EDT Sat Jun 24 2017

.SYNOPSIS...
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A cold front sweeping through this morning returning
comfortable humidity levels to the area. Below normal
temperatures greet us early next week.
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&&

.NEAR TERM /THROUGH TODAY/...
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Light to moderate rainfall will continue to shift eastward this
morning following the low. Much drier air evident on the low-
level water vapor imagery to our west is quickly eroding the
western edge of the rain as the low departs. The result will be
an end to any appreciable rainfall by daybreak, ending in our
southeast counties last. The Flash Flood Watch will be allowed
to expire at 2am, as scheduled.

The cold front will move through later this morning, leaving in
its wake lower dewpoints and clearing skies. Despite drying
through the column, some residual moisture will be present in
the mid-levels today. This will allow afternoon cu to develop as
cold air advection commences. Northern zones near and north of
I-80 could see an afternoon shower develop as a weak upper-level
shortwave passes through the broader trough. Precipitation
amounts with this activity should be negligible.

Increasing sunshine will compete against the cold air advection;
the result will be high temperatures right around the average.
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&&

.SHORT TERM /TONIGHT THROUGH MONDAY NIGHT/...
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Dry weather continues for the second half of the weekend
despite less sunshine. Yet another passing short wave will bring
clouds and given its stronger than the one Saturday isolated
showers are possible north of the I-76 corridor in the late
afternoon / early evening hours Sunday.

Mid level heights continue to fall as we kick off a new work
week. Most of the energy will reside along the lakes, so precip
chances are small over northern WV and western MD when compared
to northwest PA. Any shower will be brief. The bigger story is
the spring like feel as daytime high temps do not leave the 60s
Monday! This will be almost 15 degrees below normal.
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&&

.LONG TERM /TUESDAY THROUGH FRIDAY/...
Highlights:
- Cool start - warm end temp wise
- Unsettled weather returns Friday
- No heat waves or high water threat

Mid level heights increase with a ridge building into the
eastern United States. This will bring temps back to normal
levels by Thursday and above normal by a week from now.

&&

.AVIATION /04Z SATURDAY THROUGH WEDNESDAY/...
VFR weather will yield to MVFR and IFR cigs this evening in wake
of the cold front. Drier air will work into the area toward 12Z
bringing terminals back to VFR where they will stay for the
balance of the forecast. Winds will be gusty from the WSW
tomorrow afternoon with peak gusts around 20 kts.

.OUTLOOK...
Upper trough may bring occasional restrictions Sun and Mon in
afternoon showers/storms.

&&

.HYDROLOGY...
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River forecasts have been tweaked upward across Mon and
headwaters of Ohio river. We still do not have any forecast
points going to flood, but Pittsburgh, Elizabeth, and Charleroi
are predicted to reach action stage.
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&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
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MD...Flash Flood Watch until 2 AM EDT early this morning for MDZ001.
OH...Flash Flood Watch until 2 AM EDT early this morning for OHZ059-
     068-069.
PA...Flash Flood Watch until 2 AM EDT early this morning for
     PAZ021>023-029-031-073>076.
WV...Flash Flood Watch until 2 AM EDT early this morning for
     WVZ002>004-012-021-509>514.
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&&

$$