133
FXUS64 KJAN 220750
AFDJAN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
250 AM CDT TUE JUL 22 2025
..NEW DISCUSSION
DISCUSSION
ISSUED AT 249 AM CDT TUE JUL 22 2025
TODAY AND TONIGHT: HEAT AND HIGH HUMIDITY LEADING TO DANGEROUS
HEAT STRESS CONDITIONS WILL REMAIN THE FORECAST CONCERN AGAIN
TODAY. HIGH PRESSURE SURFACE AND ALOFT WILL REMAIN CENTERED OVER
THE REGION RESULTING IN TEMPERATURES TOPPING OUT IN THE MID TO
UPPER 90S AT MOST LOCATIONS. NORMAL AFTERNOON HIGHS RUN IN THE
LOWER 90S. ALTHOUGH PWATS HAVE DROPPED BELOW TWO INCHES, ABUNDANT
LOW LEVEL MOISTURE WL HELP MAINTAIN A MOIST TROPICAL AIRMASS OVER
OUR CWA THROUGH THE PERIOD. THE HIGH TEMPERATURES WILL COMBINE
WITH THE HIGH HUMIDITY TO RESULT IN HEAT INDEX VALUES BETWEEN 105
AND 110 EAST OF INTERSTATE 55 WARRANTING A HEAT ADVISORY BUT, WEST
OF I-55, HEAT INDEX VALUES WILL BE BETWEEN 110 AND 115 WHERE AN
EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL THIS EVENING. /22/
WEDNESDAY THROUGH NEXT MONDAY...OPPRESSIVE HEAT WILL CONTINUE TO
GRIP THE FORECAST AREA AS THE PERIOD BEGINS WEDNESDAY. AFTERNOON
HIGHS WILL RANGE FROM THE MID AND UPPER 90S ACROSS EASTERN PORTIONS
OF THE AREA, TO AROUND THE CENTURY MARK OVER AREAS ALONG AND WEST OF
THE MISSISSIPPI RIVER. THIS COUPLED WITH VERY HUMID CONDITIONS,
WILL RESULT IN PEAK HEAT INDICES RANGING FROM 105F-115F AREAWIDE. AS
A RESULT, I'VE HOISTED AN "EXTREME HEAT WARNING" FOR MUCH OF THE
AREA WHERE HEAT INDICES WILL BE BETWEEN 110F-115F, WITH A "HEAT
ADVISORY" OVER THE REMAINDER OF THE FORECAST AREA WHERE INDICES WILL
BE BETWEEN 105F-110F, FROM 10 AM WEDNESDAY THROUGH 8 PM WEDNESDAY.
EACH DAY AFTERWARDS THROUGH THE REMAINDER OF THE FORECAST PERIOD
NEXT MONDAY, THE COMBINATION OF HIGH HEAT AND HUMIDITY WILL RESULT
IN AFTERNOON HEAT INDEX VALUES PEAKING AT AND ABOVE THE CENTURY
MARK, WITH LITTLE RELIEF EXPECTED DURING THE NIGHT TIME HOURS. AS A
RESULT, A COMBINATION OF EITHER A "HEAT ADVISORY" AND/OR "EXTREME
HEAT WARNING" WILL BE POSSIBLE OVER PORTIONS OF, IF NOT ALL OF, THE
FORECAST AREA. PLEASE CONTINUE TO MONITOR THE LATEST FORECASTS FOR
THE MOST UP-TO-DATE INFORMATION CONCERNING THE DANGEROUS HEAT
CURRENTLY ENCOMPASSING THE REGION.
DESPITE THE HEAT, CHANCES FOR MAINLY AFTERNOON AND EARLY EVENING
SHOWERS AND STORMS WILL CREEP BACK INTO THE FORECAST OVER MAINLY
EASTERN PORTIONS OF THE AREA ON WEDNESDAY. THIS IS AS A RESULT OF A
BOUNDARY POSSIBLY SNEAKING INTO EASTERN PORTIONS OF THE AREA LATE IN
THE DAY. DECENT RAIN CHANCES WILL ALSO EXIST OVER MAINLY EASTERN
AND SOUTHERN PORTIONS OF THE AREA THURSDAY THROUGH SATURDAY, AS A
DISTURBANCE EMBEDDED IN EASTERLY FLOW MOVES ALONG THE NORTH CENTRAL
GULF COAST. COME SUNDAY INTO MONDAY THROUGH, RAIN CHANCES BEGIN TO
LESSEN AGAIN ACROSS THE AREA AS HIGH PRESSURE ALOFT YET AGAIN
STRENGTHENS ACROSS THE REGION. /19/
AVIATION
(06Z TAFS)
ISSUED AT 1234 AM CDT TUE JUL 22 2025
VFR CONDITIONS AND A LIGHT S-SW WIND WILL PREVAIL THROUGH THE TAF
PERIOD. /22/
PRELIMINARY POINT TEMPS/POPS
JACKSON 98 76 98 77 / 0 0 20 10
MERIDIAN 98 75 97 75 / 10 10 40 20
VICKSBURG 98 76 99 78 / 0 0 10 10
HATTIESBURG 100 77 98 77 / 10 10 50 30
NATCHEZ 97 76 98 76 / 0 0 10 10
GREENVILLE 98 76 99 78 / 0 0 0 0
GREENWOOD 98 76 99 78 / 0 0 10 10
JAN WATCHES/WARNINGS/ADVISORIES
MS...HEAT ADVISORY FROM 10 AM THIS MORNING TO 8 PM CDT THIS EVENING
FOR MSZ026>033-036>039-044>046-049>052-055>058-061>066-
072>074.
HEAT ADVISORY FROM 10 AM TO 8 PM CDT WEDNESDAY FOR MSZ037-
044>046-050>052-057-058.
LA...NONE.
AR...NONE.
22/19/22
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