220
FXUS62 KGSP 221512
AFDGSP
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1012 AM EST SAT NOV 22 2025
SYNOPSIS
A WARM AIR MASS REMAINS IN PLACE OVER OUR REGION TODAY WITH
DECREASING RAIN CHANCES. DRY BUT MILD HIGH PRESSURE WILL ARRIVE ON
SUNDAY AND PERSIST INTO EARLY NEXT WEEK. A MOIST COLD FRONT WILL
CROSS THE THE AREA IN THE MIDDLE OF THE WEEK, USHERING IN MUCH
COOLER TEMPERATURES BEHIND IT.
NEAR TERM /THROUGH TONIGHT/
AS OF 1000 AM SATURDAY: A VERY ACTIVE SPLIT FLOW PATTERN CONTINUES
TO DOMINATE THE SYNOPTIC PATTERN ACROSS THE COUNTRY WITH PERTURBED
NORTHERN STREAM FLOW DRAPED FROM THE PACIFIC NORTHWEST TO NEW
ENGLAND ROUGHLY ALONG THE CANADIAN BORDER. WITHIN THE NORTHERN
STREAM, A LEAD CLOSED UPPER LOW AND POTENT SHORTWAVE TROUGH IS
LIFTING JUST SOUTH OF HUDSON BAY WITH A TRAILING PACIFIC JET
EXTENDING ACROSS BRITISH COLUMBIA INTO ALBERTA. FARTHER SOUTH,
WITHIN THE SOUTHERN BRANCH, A CUTOFF CLOSED UPPER LOW CONTINUES TO
DROP ACROSS SOUTHERN CALIFORNIA INTO THE DESERT SOUTHWEST. FLOW WILL
BECOME INCREASINGLY ZONAL AS A FAST MOVING SHORTWAVE QUICKLY SHIFTS
OFFSHORE. THIS WILL KEEP A STALLED BOUNDARY OFF TO THE NORTH AS FLOW
WILL BE ORIENTED PARALLEL TO THE FRONT. CLEARING SKIES AND PLENTIFUL
SUNSHINE WILL RESULT IN ANOTHER VERY WARM DAY FOR LATE NOVEMBER WITH
HIGHS SOARING INTO THE LOW 70S TO LOW 80S. SEVERAL LOCATIONS WILL
LIKELY SET NEW DAILY RECORD HIGHS AS ANOMALOUS WARMTH SHOWS NO SIGNS
OF LETTING GO OF ITS GRASP ACROSS THE SOUTHEAST STATES. FORCING WILL
BE MUCH MORE NEBULOUS, BUT AN ISOLATED OR WIDELY SCATTERED SHOWER OR
TWO CANNOT BE RULED OUT THROUGH AFTERNOON PEAK HEATING. BY TONIGHT,
THE PREVIOUSLY MENTIONED PACIFIC JET OVER BRITISH COLUMBIA AND
ALBERTA IS PROGGED TO DIVE ACROSS THE CANADIAN PRAIRIES AND CARVE
OUT A TROUGH OVER THE NORTHERN PLAINS INTO THE GREAT LAKES REGION.
INCREASING NORTHWEST FLOW EXTENDING ACROSS THE OHIO VALLEY AND INTO
THE APPALACHIANS WILL FINALLY BE THE IMPETUS TO SEND THE STALLED
BOUNDARY ACROSS THE AREA AS A COLD FRONT. THIS WILL MAINLY BE A DRY
FRONTAL PASSAGE OUTSIDE OF THE IMMEDIATE MOUNTAINS ALONG THE
TENNESSEE BORDER.
SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/
AS OF 1220 AM EST SATURDAY: DRY AND COOLER HIGH PRESSURE BUILDS INTO
THE AREA FROM THE WEST ON SUNDAY. COOLER IS RELATIVE AS HIGHS WILL
STILL BE AROUND 10 DEGREES ABOVE NORMAL. LOWS SUNDAY NIGHT DO DROP
TO NEAR NORMAL ACROSS THE MOUNTAINS AND NEARLY 5 DEGREES ABOVE
NORMAL ELSEWHERE.
THE HIGH MOVES EAST ON MONDAY AND OFF SHORE MON NITE. THIS SETS UP A
SOUTHERLY FLOW ACROSS THE AREA WITH INCREASING CLOUDS AND MOISTURE
LATE MONDAY NIGHT AHEAD OF AN APPROACHING COLD FRONT. MOSTLY SUNNY
SKIES WITH HIGHS AROUND 5 DEGREES ABOVE NORMAL MONDAY. CLOUDS
INCREASE MONDAY NIGHT BUT SHOWERS SHOULD REMAIN WEST OF THE AREA.
WITH THE CLOUDS AND SOUTHERLY FLOW, LOWS RISE TO AROUND 10 DEGREES
ABOVE NORMAL.
LONG TERM /TUESDAY THROUGH FRIDAY/
AS OF 1250 AM EST SATURDAY: GUIDANCE IS COMING TOGETHER ON THE COLD
FRONT CROSSING THE AREA IN THE WEDNESDAY TIME FRAME. A SHORT WAVE
RIDGE STARTS OVER THE AREA THEN MOVES EAST TUESDAY, BUT IT'S STILL
STRONG ENOUGH TO DAMPEN THE INITIAL SHORT WAVE THAT RIDES UP THE
RIDGE INTO THE GREAT LAKES. A MORE INTACT UPPER LOW MOVES ACROSS THE
GREAT LAKES ON WEDNESDAY. A SERIES OF SHORT WAVES ROTATING AROUND
THE MOVE CROSS THE AREA WED AND EARLY THU. AT THE SURFACE, DEEP
MOISTURE INCREASES ACROSS THE AREA AS AN INITIAL WAVE ALONG THE
FRONT MOVES INTO THE AREA. WITH MOISTURE AND PRECIP MOVING IN AND A
DRY AIR MASS IN PLACE ACROSS THE AREA, A WEAK CAD MAY DEVELOP
TUESDAY. THE SHORT WAVES THEN GIVE THE FRONT A PUSH ON WEDNESDAY AS
ANOTHER WAVE MOVES ALONG THE FRONT AND INTO THE AREA. THE
COMBINATION OF FORCING AND DEEP MOISTURE BRING INCREASING CHANCES OF
SHOWERS WITH THIS SYSTEM.
SOME TIMING DIFFERENCES REMAIN WHICH AFFECTS THE POTENTIAL FOR ANY
SURFACE BASED INSTABILITY. STILL, EVEN THE SLOWER GUIDANCE HAS
LITTLE IN THE WAY OF SBCAPE. THE GUIDANCE SHOWS THE POTENTIAL FOR UP
TO 200 J/KG OF MUCAPE WITH STRONG SHEAR. THAT SAID, THE FRONTAL
POSITION AND SHEAR DIRECTION DON'T LOOK GREAT FOR A HIGH SHEAR/LOW
CAPE EVENT. THIS WILL CONTINUE TO BE MONITORED. GUIDANCE IS IN
BETTER AGREEMENT OF THE POTENTIAL FOR SOME HEAVY RAINFALL,
ESPECIALLY ACROSS THE MOUNTAINS. THAT SAID, WITH THE DRY ANTECEDENT
CONDITIONS, WE DON'T EXPECT WIDESPREAD HYDRO ISSUES UNLESS QPF
RESPONSE INCREASES A GOOD BIT. PRECIP TAPERS OFF WED NITE, BUT CAN'T
RULE OUT A BRIEF PERIOD OF LIGHT NW FLOW SNOWFALL.
BEHIND THE FRONT, AN ACTUAL COLD AIR MASS MOVES IN AS DRY HIGH
PRESSURE BUILDS OVER THE AREA THU AND FRI. HIGHS THU AROUND 5
DEGREES BELOW NORMAL ACROSS THE MOUNTAINS AND NEAR NORMAL ELSEWHERE
DROP A FEW DEGREES ACROSS THE MOUNTAINS AND AROUND 5 DEGREES BELOW
NORMAL ELSEWHERE ON FRIDAY. LOWS FALL TO 5 TO 10 DEGREES BELOW
NORMAL.
AVIATION /15Z SATURDAY THROUGH WEDNESDAY/
AT KCLT AND ELSEWHERE: AN EVOLVING MIX OF FLIGHT RESTRICTIONS
CONTINUES EARLY THIS MORNING AS DENSE FOG ALONG AND NORTH OF THE I-
40 CORRIDOR HAS GIVEN WAY TO THE DEVELOPMENT OF A WIDESPREAD DECK OF
LOW STRATUS EXTENDING ALONG THE I-85 CORRIDOR. THIS HAS BROUGHT
IMPROVING CONDITIONS TO KHKY WITH LOWERING CEILINGS AT
KAND/KGMU/KGSP/KCLT. MVFR CEILINGS ARE COMMON WITH A FEW INSTANCES
OF IFR IN PLAY AS WELL. WITH TIME, STRATUS WILL LIFT AND SCATTER
THROUGH THE MORNING WITH CONDITIONS IMPROVING BACK TO VFR BY MID TO
LATE MORNING. OTHERWISE, WINDS WILL BE GUSTY THROUGH THE DAY AHEAD
OF AN APPROACHING COLD FRONT. WINDS WILL SHIFT FROM SOUTHWEST TO OUT
OF THE NORTH BEHIND THE FRONT. A COUPLE ISOLATED SHOWERS CANNOT BE
DISCOUNTED THIS AFTERNOON IN THE VICINITY OF THE CLT METRO, HOWEVER
CONFIDENCE IS TOO LOW TO WARRANT MENTION IN THE TAF AT THIS TIME.
OUTLOOK: DRIER CONDITIONS RETURN EARLY NEXT WEEK, ALTHOUGH THERE
WILL REMAIN SOME POTENTIAL FOR MOUNTAIN VALLEY FOG/LOW STRATUS EACH
MORNING.
CLIMATE
RECORDS FOR 11-22
MAX TEMPERATURE MIN TEMPERATURE
STATION HIGH LOW HIGH LOW
------- ---------- ---------- ---------- ----------
KAVL 74 1940 32 1937 57 1934 15 2008
1937
KCLT 76 2011 38 1929 65 1883 13 2008
KGSP 77 2011 38 1937 58 1953 18 1914
GSP WATCHES/WARNINGS/ADVISORIES
GA...NONE.
NC...NONE.
SC...NONE.
SYNOPSIS...RWH
NEAR TERM...TW
SHORT TERM...RWH
LONG TERM...RWH
AVIATION...TW
CLIMATE...GSP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page