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Area Forecast Discussion
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000
FXUS61 KPBZ 171844
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
244 PM EDT TUE MAR 17 2015

.SYNOPSIS...
BUILDING HIGH PRESSURE WILL BRING DRY WEATHER THROUGH THURSDAY.
A WAVE OF LOW PRESSURE CROSSING THE OHIO VALLEY COULD BRING
INCREASING PRECIPITATION CHANCES THURSDAY NIGHT AND FRIDAY.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
CLOUDS WILL CONTINUE TO DECREASE THIS EVENING WITH MAINLY CLEAR
SKIES OVERNIGHT UNDER BUILDING HIGH PRESSURE. WITH COLD
ADVECTION...LOWS SHOULD AVERAGE SEVERAL DEGREES BELOW THE SEASONAL
AVERAGE.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/...
DRY WEATHER SHOULD CONTINUE THROUGH THURSDAY WITH HIGH PRESSURE
ACROSS THE GREAT LAKES REGION. THE NEXT SHORTWAVE IS PROGGED TO
ADVANCE ACROSS THE REGION THURSDAY NIGHT AND FRIDAY. MODELS
CONTINUE A NORTHWARD TREND WITH THE SHORTWAVES ASSOCIATED SURFACE
REFLECTION...BRINGING PRECIP FARTHER NORTH. TRENDED POPS UPWARD TO
ACCOUNT FOR THIS. COULD HAVE A MIX OF LIGHT RAIN AND SNOW AT THE
ONSET...WITH MAINLY RAIN EXPECTED. THE HIGHER ELEVATIONS OF MD/WV
COULD SEE SOME LIGHT SNOW ACCUMULATIONS BEFORE THE CHANGEOVER.

A BLEND OF THE LATEST SREF AND GRIDDED MOS NUMBERS RESULTED IN
TEMPS SEVERAL DEGREES BELOW SEASONAL LEVELS THROUGH THE PERIOD.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
A MAINLY DRY PERIOD IS EXPECTED THROUGH EARLY IN THE WEEK WITH
BROAD UPPER TROUGHING OVER THE NORTHEASTERN CONUS. THE NEXT CHANCE
FOR PRECIP SHOULD ARRIVE WITH ANOTHER ADVANCING TROUGH TUESDAY.
TEMPERATURES SHOULD CONTINUE TO AVERAGE BELOW SEASONAL LEVELS.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
ANY REMAINING MVFR CIGS SHOULD QUICKLY SCATTER OUT THROUGH LATE
AFTERNOON...WITH VFR RETURNING AND CONTINUING THROUGH WEDNESDAY
UNDER BUILDING HIGH PRESSURE.

.OUTLOOK.../WEDNESDAY NIGHT THROUGH SUNDAY/...
RESTRICTIONS ARE POSSIBLE LATE THURSDAY NIGHT AND FRIDAY AS LOW
PRESSURE TRACKS ACROSS THE OHIO VALLEY.

&&

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

&&

$$

07





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