523
FXUS62 KGSP 251736
AFDGSP
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
136 PM EDT MON AUG 25 2025
SYNOPSIS
COOL HIGH PRESSURE WILL REMAIN IN PLACE ACROSS THE REGION THROUGH
MUCH OF THE WEEK. TEMPERATURES WILL REMAIN BELOW NORMAL THROUGH THE
WEEK WITH COMFORTABLE HUMIDITY.
NEAR TERM /THROUGH TUESDAY/
AS OF 110 PM MON: SFC TROUGH ANALYZED OVER THE COASTAL PLAIN WITH
PREDOMINANTLY NORTHERLY WINDS ACROSS THE AREA AND DEWPOINTS HAVING
DIPPED INTO THE UPPER 50S ON RECENT OBS--ALL POINTING TO COLD FRONT
HAVING PASSED THE CWA. SOME PIEDMONT LOCATIONS WILL SEE WINDS BACK
TO A MORE WESTERLY DIRECTION FOR A TIME THIS AFTN VIA LEE TROUGH,
BUT THAT WILL BE OF LITTLE CONSEQUENCE. FAIR-WX CUMULUS SHOULD
DISSIPATE BEFORE SUNSET, WITH ONLY PASSING ALTO/CIRRUS DECKS SEEN
TONIGHT. CONTINUING LIGHT NORTHERLY WINDS MAY OFFSET RADIATION
TONIGHT, BUT THE DRIER, COOLER AIR WILL ALLOW MIN TEMPS TO FALL
3-6 BELOW NORMAL. CAN'T ENTIRELY RULE OUT RADIATION FOG IN SOME
OF THE SHELTERED MOUNTAIN VALLEYS AS CROSSOVER TEMPS STILL MAY BE
REACHED. LOW-LEVEL CAA WILL CONTINUE THRU TUESDAY, WITH SFC HIGH
CENTERED A BIT CLOSER TO US IN THE MID-MS VALLEY AND SUPPORTING
SOMEWHAT LIGHTER WINDS. MAX TEMPS TUE 4-6 BELOW NORMAL.
SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/
AS OF 1242 PM EDT MONDAY: MID LEVEL TROFFING WILL REMAIN IN PLACE
ACROSS EASTERN CANADA AND THE NORTHEAST STATES THROUGH THE SHORT
RANGE PERIOD. THIS WILL SUPPORT COOL SURFACE HIGH PRESSURE ACROSS
OUR REGION, WHICH WILL KEEP CONDITIONS DRY WITH TEMPERATURES WELL
BELOW NORMAL. HIGH TEMPERATURE ANOMALIES LOOK TO BE 7 TO 9 DEGREES
BELOW NORMAL EACH DAY AND OVERNIGHT LOWS ARE EXPECTED TO BE 9 TO 12
DEGREES BELOW NORMAL EACH NIGHT. VERY NICE CONDITIONS FOR AUGUST!
LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/
AS OF 1255 PM EDT MONDAY: THE DEEP TROF TO OUR NORTHEAST WILL SLOWLY
LIFT OUT OF THE AREA WHILE A WEAKER TROF DROPS INTO THE UPPER MS
VALLEY. AT THE SURFACE, HIGH PRESSURE THAT WILL HAVE BEEN WEST OF
THE MOUNTAINS WILL SHIFT TO THE EAST CREATING MORE OF AN EASTERLY
FLOW ACROSS THE REGION. THIS WILL LEAD TO SOME CHANCE OF SHOWERS IN
THE PERIOD AND LIKELY SLIGHTLY LESS COOL OVERNIGHT LOWS. AFTERNOON
HIGHS WILL REMAIN 5-7 DEGREES BELOW NORMAL.
AVIATION /18Z MONDAY THROUGH SATURDAY/
AT KCLT AND ELSEWHERE: COLD FRONT APPEARS TO HAVE PASSED THE
TERMINALS AS OF 18Z; WINDS TURNED NW DURING THE MORNING BUT HAVE
NOW BACKED TO WNW OR EVEN WSW DUE TO LEE TROUGH. A FEW GUSTS
TO 15-19 KT OVER THE MOUNTAINS. LOW-VFR CUMULUS HERE AND THERE
MAY EVEN FORM AN OCCASIONAL CIG THIS AFTN. LIGHT NW TO NNE FLOW
SHOULD BE RESTORED THIS EVENING AND PASSING CLOUDS AT 180-250
WILL BE SEEN THE REMAINDER OF THE PERIOD. ALTHOUGH CROSSOVER TEMPS
MAY BE REACHED TONIGHT IN SOME MOUNTAIN VALLEYS, LIGHT WINDS ARE
EXPECTED TO KEEP FOG AT BAY. WEAK SIGNAL FOR NOCTURNAL STRATUS AT
KAVL PROMPTED FEW002 MENTION NEAR DAYBREAK. A FEW DIURNAL CU MAY
DEVELOP TUESDAY BUT NOT LIKELY UNTIL AROUND 18Z SO OMITTED FROM
ALL SITES EXCEPT KCLT.
OUTLOOK: DRY CONDITIONS WILL LINGER THROUGH MOST OF THE WEEK. FOG
AND/OR LOW STRATUS MAY DEVELOP EACH NIGHT, MAINLY IN THE MOUNTAIN
VALLEYS.
GSP WATCHES/WARNINGS/ADVISORIES
GA...NONE.
NC...NONE.
SC...NONE.
SYNOPSIS...SCW
NEAR TERM...WIMBERLEY
SHORT TERM...SCW
LONG TERM...SCW
AVIATION...WIMBERLEY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page