Area Forecast Discussion
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FXUS61 KPBZ 230046
AFDPBZ

Area Forecast Discussion
National Weather Service Pittsburgh PA
846 PM EDT Fri Jun 22 2018

.SYNOPSIS...
Slow moving low pressure will generate periodic shower and
thunderstorm chances through the weekend.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
The late evening update featured the cancellation of the Flash
Flood Watch as convection has lost punch with the fading
daylight; however, showers will continue to plague the area as
shortwave impulses continue to rotate around the broad
Midwestern low.

No change was needed for the temperature prognosis.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY/...
The upper level low will open up and move across the Great
Lakes on Saturday...maintaining periodic showers and storms as
waves of energy continue to rotate around the main trough.

Overall instability looks marginal, but there will be plenty of
available moisture, as dewpoints push well into the 60s.
Thunder cannot be completely ruled out...so have kept in the
chance for convection through the period.

Shower chances will begin to decrease during the afternoon
after the trough axis moves east of the forecast area.
Following a brief break in the weather Saturday night...a weak
cold front will cross Sunday, so chance to likely PoPs have been
maintained.

Temperatures will have a limited diurnal range...suppressed by
the clouds and rain, with highs near or just below normal, and
lows above normal.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
High pressure and a return to dry conditions Monday. A warming
trend in temperatures is expected heading towards the middle of
next week.

&&

.AVIATION /01Z SATURDAY THROUGH WEDNESDAY/...
Moisture pooling around the northern ridges will bring MVFR and
potentially IFR to northern ports of FKL/DUJ tonight. As the
low approaches from the west tonight, low-level moisture will
fill in further and MVFR ceilings will eventually spread areawide.
Gradual improvement is expected through Saturday from S-N.

OUTLOOK... Periodic restriction potential continues through Sun
night as slow moving low pressure crosses the area.

&&

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

&&

$$
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