Area Forecast Discussion
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000
FXUS61 KPBZ 252138
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
538 PM EDT TUE AUG 25 2015

.SYNOPSIS...
COOLER CONDITIONS AND SPARSE SHOWER CHANCES CAN BE EXPECTED UNTIL
HIGH PRESSURE BEGINS TO REBUILD FOR THE WEEKEND.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
COLDER MID-LEVEL AIR WILL CONTINUE TO FLOOD OVER THE CWA OVERNIGHT
AS THE UPPER LOW CENTERED OVER NORTHERN ONTARIO MOVES TOWARD
WESTERN QUEBEC TONIGHT. THIS WILL KEEP INSTABILITY STRONG ENOUGH
TO ALLOW FOR CONTINUED STRATOCUMULUS OVERNIGHT. THIS WILL KEEP
TEMPERATURES FROM GOING INTO TOTAL FREE FALL...THOUGH LOWS IN THE
50S WILL BE WIDESPREAD REGARDLESS. ALL IN ALL...A VERY NORMAL
NIGHT IF IT WAS OCTOBER. FRIES

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH THURSDAY/...
THE CLOSED UPPER LOW TO THE NORTH OF THE GREAT LAKES THROUGH IS
FORECAST TO BEGIN FILLING ON THURSDAY. IN THE MEANTIME...SHORT-
TERM TEMPERATURES WILL REMAIN 5 TO 10 DEGREES BELOW THE SEASONAL
AVERAGES WITH COOL REINFORCEMENT VIA ANOTHER SHORTWAVE ON WEDNESDAY.

SLIGHT TO CHANCE POPS AND EXTENSIVE CLOUD COVER WERE MAINTAINED
FOR COUNTIES NORTH OF I 70 FOR PASSAGE OF THAT FEATURE...WITH
IMPROVEMENT ANTICIPATED ON THURSDAY AS THE HIGH BEGINS TO BUILD.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
MODEL GUIDANCE IS IN RELATIVELY GOOD AGREEMENT WITH THE FILLING OF
THE EASTERN CONUS UPPER TROUGH BY FRIDAY AND A SHORTWAVE TROUGH
APPROACHING THIS WEEKEND. THIS WILL SUPPORT A TEMPERATURE MODERATION
TO...THEN ABOVE THE AVERAGES...ALTHOUGH INCREASED MOISTURE IN THE
DEVELOPING SOUTHWEST FLOW COULD LEAD TO DIURNAL SHOWERS AND
THUNDERSTORMS BY SUNDAY.

&&

.AVIATION /22Z TUESDAY THROUGH SUNDAY/...
GENERAL VFR IS EXPECTED FOR UPPER OHIO TERMINALS THROUGH WEDNESDAY...ALTHOUGH
AN EMBEDDED DISTURBANCE/REINFORCING FRONT MAY SPAWN SOME MVFR STRATOCU
OVER NORTHERN PORTS WITH ITS APPROACH TONIGHT...AND SOME ISOLATED
TO SCATTERED SHOWERS WITH PASSAGE ON WEDNESDAY.

OUTLOOK...WEDNESDAY NIGHT THROUGH SUNDAY... NO EXTENSIVE IFR IS
EXPECTED THROUGH THE WEEKEND.

&&

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

&&

$$


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