WILL ISAAC INFLUENCE THE HOLIDAY WEEKEND WEATHER?
ON A SCALE OF 1 TO 10, TODAY'S WEATHER RATED PRETTY CLOSE TO A PERFECT 10! THE COLD FRONT THAT
SWEPT AWAY THE HIGH HUMIDITY OF EARLIER THIS WEEK IS NOW WELL OFF THE EAST COAST, AND HAS ALSO
PUSHED WAY TO OUR SOUTH. IN ITS WAKE, WE GOT INTO A NORTHERLY FLOW OF MUCH LESS HUMID AIR. A
GOOD SIZED HIGH PRESSURE SYSTEM NOW CENTERED NEAR DETROIT, MI IS SLOWLY BUILDING TOWARD US.
THE RESULT HAS BEEN PLENTY OF SUNSHINE TODAY WITH A FEW PUFFY FAIR WEATHER CUMULUS CLOUDS,
COMFORTABLY LOW DEW POINTS, AND PLEASANT TEMPS. WITH THAT HIGH SETTLING INTO PA TONIGHT, WE
EXPECT CLEAR SKIES, LIGHT WINDS, AND COOL TEMPS WITH A BIG RANGE IN LOWS ACROSS THE AREA. WE
EXPECT READINGS TO DIP JUST BELOW 40 IN THE CHILLIEST LOCATIONS ACROSS NORTHWESTERN AND
NORTHCENTRAL PA AS WELL AS UPSTATE NY. PLACES SUCH AS BRADFORD AND KANE, PA MAY END UP WITH A
LOW OF 38 OR 39 DEGREES TOMORROW MORNING. ALSO, AS IS OFTEN THE CASE AT THIS TIME OF YEAR, RIVER
VALLEY FOG IS ALMOST A GIVEN LATE TONIGHT INTO TOMORROW MORNING IN THE TRADITIONAL FOG SPOTS OF
THE INTERIOR NORTHEAST.
OUR WEATHER WILL REMAIN IN "SNOOZE AND CRUISE" MODE FOR THE REST OF THE
WORK WEEK AND INTO AT LEAST THE START OF THE WEEKEND. AS WE HAVE BEEN ADVERTISING ALL WEEK
LONG, WE WILL EXPERIENCE A PRETTY AGGRESSIVE WARMUP HERE ON THURSDAY AND FRIDAY AS HEIGHTS
AND THICKNESSES RISE, AND 850 MB TEMPS TREND QUICKLY UPWARD. IN ADDITION, THE SURFACE PATTERN
SETTING UP THE NEXT TWO DAYS LOOKS VERY FAVORABLE FOR A FAST WARMUP. THE BIG HIGH THAT WE
MENTIONED EARLIER WILL SETTLE INTO SOUTHEAST VA BY LATE TOMORROW, AND THEN WILL SINK A BIT
FARTHER SOUTHWARD INTO THE CAROLINAS ON FRIDAY. THAT WILL PRODUCE A WEST TO SOUTHWEST
SURFACE FLOW HERE. WHAT THIS ADDS UP TO IS A WARMER DAY TOMORROW, EVEN AS DEW POINTS REMAIN
QUITE LOW. FRIDAY WILL BE NOTICEABLY HOTTER, AND HUMIDITY LEVELS WILL ALSO BEGIN TO TREND BACK
UPWARD. WE HAVE NUDGED HIGH TEMPS FOR FRIDAY UP FROM WHAT WE HAD IN CONTINUITY EARLIER IN THE
WEEK. HOPEFULLY, WE ARE NOW HOT ENOUGH, BUT THOSE 850 MB TEMPS DO LOOK VERY IMPRESSIVE! GIVEN
THE POSITION OF THE UPPER LEVEL RIDGE, AND THE DECENT NORTHWEST FLOW ALOFT ACROSS UPSTATE NY
AND NEW ENGLAND, THERE IS DEFINITELY ROOM FOR A COLD FRONT TO PRESS SOUTHWARD FRIDAY NIGHT
AND SATURDAY. JUST HOW MUCH OF A PUSH THAT FRONT HAS, AND THE SPEED AT WHICH IT MOVES
SOUTHWARD, WILL DETERMINE WHERE OUR TEMPS END UP ON SATURDAY.
THE 12Z RUN OF THE NAM SEEMED VERY BULLISH ON THE FRONT AND THE COOLING BEHIND IT FOR SATURDAY,
WHILE THE 00Z RUN OF THE EURO WAS MUCH SLOWER AND MUCH WARMER/HOTTER LOOKING THAT DAY.
PROBABLY, SOME SORT OF COMPROMISE IS THE BEST SOLUTION. WHILE THAT FRONTAL BOUNDARY WILL
LIKELY CAUSE SCATTERED SHOWERS AND T-STORMS ON FRIDAY WELL TO OUR NORTH AND NORTHEAST, AND
PERHAPS EVEN A FEW STRONG CELLS DUE TO THE LOW LEVEL JET UP THAT WAY, THE FROPA WILL PROBABLY
BE RELATIVELY UNEVENTFUL FARTHER SOUTH.
MEANWHILE, ISAAC WILL CONTINUE TO CRAWL ALONG AT A
SNAIL'S PACE.EVENTUALLY, ISAAC WILL TAKE A SHARPER TURN TO THE NORTH AND THEN THE NORTHEAST AS IT GETS
CAUGHT UP IN THE WESTERLIES. WHILE ISAAC PROMISES TO BRING MUCH NEEDED RAIN TO PARTS OF THE
NATION'S MID-SECTION, THERE IS STILL THE POTENTIAL FOR TOO MUCH RAIN TO FALL IN A SHORT PERIOD OF
TIME, LEADING TO FLOODING PROBLEMS WELL INLAND FROM WHERE IT IS NOW. THE REMNANTS OF ISAAC, AND
ITS MOISTURE, MAY EVENTUALLY AFFECT OUR WEATHER. HOWEVER, THAT MAY NOT HAPPEN UNTIL SOMETIME
EARLY NEXT WEEK. FOR NOW, WE ARE TRENDING OUR FORECAST MORE PESSIMISTIC SOUNDING AS WE HEAD
TOWARD LABOR DAY, BUT THE WORST WEATHER MAY OCCUR AFTER THE HOLIDAY.



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