Area Forecast Discussion
Issued by NWS

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000 FXUS61 KPBZ 280013 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 713 PM EST THU NOV 27 2014 .SYNOPSIS... COLD NORTHWEST FLOW WILL KEEP SCATTERED SNOW SHOWERS ACROSS THE REGION TONIGHT. HIGH PRESSURE WILL BRING DRY AND CHILLY CONDITIONS FRIDAY. A WARMING TREND IS PREDICTED THIS WEEKEND AS READING REBOUND INTO THE 50S COME SUNDAY. && .NEAR TERM /THROUGH FRIDAY/...
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UPDATE ISSUED TO HOIST A WINTER WEATHER ADVISORY FOR GARRETT AND TUCKER COUNTIES FOR SNOWFALL OVERNIGHT. RECENT REPORTS CONFIRM THREE INCHES FOR TUCKER COUNTY AND THE HIGHER ELEVATIONS OF PRESTON. SO FAR IN GARRETT UP TO TWO INCHES OF NEW SNOW HAS FALLEN. ELECTED TO KEEP PRESTON OUT OF THE ADVISORY SINCE CRITERIA /THREE INCHES OR MORE IN 12 HOURS/ WILL BE CONFINED TO THE HIGHER PEAKS IN THE SOUTHEASTERN PART OF THE COUNTY. PREVIOUS DISCUSSION BELOW... A LINE OF SNOW SHOWERS IS ABOUT TO EXIT THE EASTERN PART OF THE FORECAST AREA ASSOCIATED WITH THE MID LEVEL DCVA. SNOW DYNAMICS ARE FAVORABLE WITH LAYERED OMEGA COINCIDING IN THE DENDRICTIC GROWTH LAYER WITH PLENTY OF MOISTURE IN THE COLUMN. SNOW RATIOS WILL CLIMB FROM THE MIDDLE TEENS TO LOWER 20S OVERNIGHT. ONE THING WE WILL BE WATCHING IS A POSSIBLE BAND OF SNOW COMING OFF LAKE ERIE DURING THE MID TO LATE EVENING HOURS WHICH IS ILLUSTRATED BY THE HRRR...RUC13...AND 18Z NAM12. THIS BAND WHILE WILL NOT PRODUCE A LOT OF SNOW...HOWEVER ROAD COULD BE COVERED WITH UP TO AN INCH. UPDATED POPS TO INCREASE NUMBERS OVER MUCH OF PA TO LIKELY...WHILE BUMPING UP THE MTNS TO CATEGORICAL. SO FAR THREE INCHES OF SNOW HAS FALLEN IN THE HIGHEST PEAKS IN PRESTON COUNTY. SNOW TOTALS WERE MAINTAINED FOR THE LARGE PART WITH A SLIGHT UPWARD ADJUSTMENT OVER THE I-80 CORRIDOR TO ACCOUNT FOR INCREASING SNOW RATIOS THIS EVENING.
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&& .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/... SOUTHWEST LOW LEVEL FLOW WILL DEVELOP FRIDAY NIGHT INTO SATURDAY WITH UPPER LEVEL FLOW BECOMING MORE ZONAL. A SHORTWAVE AND WARM ADVECTION WILL BRING CLOUDS AND POSSIBLY A BIT OF LIGHT SNOW EARLY SATURDAY NORTH OF PITTSBURGH. TEMPERATURES WILL WARM DRAMATICALLY SATURDAY NIGHT AND SUNDAY AHEAD OF AN APPROACHING UPPER TROUGH AND COLD FRONT. LOW LEVEL MOISTURE WILL INCREASE AHEAD OF THE FRONT ALLOWING FOR SCATTERED RAIN SHOWERS SATURDAY NIGHT AND SUNDAY. TEMPERATURES WILL WARM TO OVER +5 AT 850MB SUNDAY AFTERNOON WITH MAX TEMPS WELL INTO THE 50S SUNDAY. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... FRONT WILL CLEAR THE AREA EARLY MONDAY MORNING. SHOWERS WILL END BUT TEMPS WILL COOL DOWN ON MONDAY. SEASONABLE TEMPERATURES MID WEEK WITH THE NEXT DISTURBANCE AND COLD FRONT ARRIVING LATE TUESDAY AND WEDNESDAY. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/...
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ONE ROUND OF SNOW AROUND SUNSET HAS MOVED THROUGH ALL TERMINALS...BUT A BAND OF SNOW HAS MOVED INLAND FROM LAKE ERIE AS OF 00Z AND WILL MAKE ITS WAY TO THE SOUTHEAST. EXPECT THIS LINE TO AFFECT ALL PITTSBURGH METRO AREA TERMINALS. IN ADDITION...OCCASIONAL SNOW IS EXPECTED TO CONTINUE AT FKL/DUJ THROUGH THE EVENING HOURS. ALL SNOW SHOULD DIMINSH BY SUNRISE. WINDS WILL BACK TO THE WEST- SOUTHWEST FOR FRIDAY WITH VFR CONDITIONS EXPECTED. OUTLOOK.../FRIDAY NIGHT THROUGH TUESDAY/... RESTRICTIONS WILL BE POSSIBLE FRIDAY NIGHT AT FKL/DUJ WITH A SYSTEM MOVING NORTH OF THE REGION. THE NEXT CHANCE FOR WIDESPREAD RESTRICTIONS WILL BE SUNDAY WITH THE PASSAGE OF A COLD FRONT.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES...
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MD...WINTER WEATHER ADVISORY UNTIL 7 AM EST FRIDAY FOR MDZ001. OH...NONE. PA...NONE. WV...WINTER WEATHER ADVISORY UNTIL 7 AM EST FRIDAY FOR WVZ041.
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&& $$ NEAR TERM...98 AVIATION...33

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