247
FXUS64 KJAN 221726
AFDJAN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
1226 PM CDT SAT AUG 22 2026
..NEW DISCUSSION, AVIATION
KEY MESSAGES
- DANGEROUS HEAT STRESS IS EXPECTED ACROSS PORTIONS OF THE
FORECAST AREA OVER THE NEXT SEVERAL DAYS.
- ISOLATED SEVERE STORMS CAPABLE OF DAMAGING WIND GUSTS ARE
POSSIBLE THIS EVENING INTO EARLY TONIGHT.
DISCUSSION
ISSUED AT 1222 PM CDT SAT AUG 22 2026
THIS AFTERNOON THROUGH MONDAY:
ANOTHER HOT AFTERNOON IS EXPECTED AS DANGEROUS HEAT CONDITIONS
CONTINUE ACROSS THE REGION. HIGHS IN THE UPPER 90S/NEAR 100 DEGREES
WITH HEAT INDICES BETWEEN 105-110F WEST OF I-55. A HEAT ADVISORY
WILL REMAIN IN EFFECT UNTIL THIS EVENING. IN ADDITION TO HOT
CONDITIONS, A DISTURBANCE FROM THE CENTRAL PLAINS WILL PUSH THROUGH
LATE THIS AFTERNOON. COMBINING WITH DAYTIME HEATING TO PROVIDE
THUNDERSTORM CHANCES NORTH OF I-20. A SLIGHT (2 OUT OF 5) RISK FOR
SEVERE WEATHER FOR EXTREME NORTHWEST MS (BOLIVAR, SUNFLOWER,
LEFLORE,AND GRENADA COUNTIES) AND A MARGINAL (1 OUT OF 5) RISK NORTH
OF I-20. PRIMARY HAZARD OF CONCERN WILL BE DAMAGING WIND GUSTS.
PERSISTENT HOT/HUMID CONDITIONS WILL CONTINUE SUNDAY. DANGEROUS HEAT
CONDITIONS IS EXPECTED WITH GREATEST HEAT STRESS OVER THE SOUTHWEST
WHERE HEAT INDICES REACH 110 DEGREES ARE EXPECTED. ANOTHER HEAT
ADVISORY WILL BE ISSUED ON SUNDAY FOR ALL OF OUR NORTHEAST LA
PARISHES AND PORTIONS OF SOUTHWEST/WEST/CENTRAL/SOUTHEAST MS. A WEAK
FRONTAL BOUNDARY WILL PUSH SOUTHWARD, BRIEFLY "COOLING" TEMPS TO THE
LOWER 90S WITH HEAT INDICES NEAR 105 FOR MONDAY.
TUESDAY THROUGH SATURDAY:
HIGH PRESSURE WILL RETROGRADE TOWARDS THE SOUTHWEST CONUS WITH A
TROUGH AXIS SETTING UP ACROSS THE SOUTHERN CONUS. AS A RESULT,
NORTHWEST FLOW ACROSS THE AREA WILL ALLOW A FEW WEAK DISTURBANCES TO
INCREASE AFTERNOON RAIN CHANCES THROUGHOUT THE WEEK. HEAT AND
HUMIDITY WILL BE ON THE REBOUND AS HEAT INDICES BEGIN TO INCREASE TO
110 DEGREES WEST OF I-55. HEAT HEADLINES AND ADVISORIES WILL LIKELY
BE NEEDED AS THE WEEK PROGRESS. /SW/
AVIATION
(18Z TAFS)
ISSUED AT 1222 PM CDT SAT AUG 22 2026
VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH THE TAF PERIOD AT
ALL SITES ALONG AND SOUTH OF THE INTERSTATE 20 CORRIDOR. NORTHERN
TAF SITES WILL HAVE A GREATER CHANCE FOR SHOWERS AND THUNDERSTORMS
GENERALLY BETWEEN 23Z TODAY AND 06Z SUNDAY. BRIEF RESTRICTIONS TO
VISIBILITY OR CEILINGS WILL BE POSSIBLE IN ADDITION TO GUSTY WINDS
WITH STRONGER STORMS. /NF/
PRELIMINARY POINT TEMPS/POPS
JACKSON 74 98 74 92 / 20 10 30 60
MERIDIAN 73 98 73 92 / 10 10 10 50
VICKSBURG 74 98 74 92 / 10 10 10 50
HATTIESBURG 74 99 74 94 / 0 10 10 50
NATCHEZ 75 99 75 95 / 0 10 10 20
GREENVILLE 74 97 74 93 / 40 10 40 60
GREENWOOD 72 96 72 91 / 40 10 40 60
JAN WATCHES/WARNINGS/ADVISORIES
MS...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR MSZ018-019-025-
034>036-040>043-047>049-053>055-059>064-072.
LA...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR LAZ007>009-015-016-
023>026.
AR...HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR ARZ074-075.
SW/NF
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