686
FXUS64 KJAN 211124
AFDJAN
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON MS
624 AM CDT TUE JUL 21 2026
..NEW AVIATION
KEY MESSAGES
- DANGEROUS HEAT STRESS CONDITIONS WILL CONTINUE THROUGH THE
MIDDLE OF THIS WEEK.
- TROPICAL BERTHA IS FORECAST TO STAY SOUTH OF OUR FORECAST AREA,
WITH THE PROBABILITY OF HAZARDOUS IMPACTS IN OUR AREA VERY LOW
AT THIS TIME.
DISCUSSION
ISSUED AT 154 AM CDT TUE JUL 21 2026
TROPICAL STORM BERTHA, A SHEARED STORM, WILL CONTINUE TO MOVE
SLOWLY WEST ALONG THE GULF COAST OVER THE NEXT FEW DAYS. NO
SIGNIFICANT IMPACTS ARE EXPECTED IN OUR FORECAST AREA AS IT PASSES
TO THE SOUTH, BUT WINDS WILL BE A LITTLE BREEZY FROM THE NORTH
WEDNESDAY INTO THURSDAY.
A ROBUST UPPER-LEVEL RIDGE CENTERED OVER THE SOUTHERN HIGH PLAINS
IS REINFORCING THE DRY, HOT CONDITIONS OVER OUR REGION MEANWHILE.
A COOL FRONT SAGGING INTO THE REGION BY WEDNESDAY WILL SERVE AS A
FOCUS FOR AFTERNOON SHOWER AND THUNDERSTORM DEVELOPMENT FOR THE
BACK HALF OF THE WEEK AND NEXT WEEKEND.
CONFIDENCE IS HIGH FOR DANGEROUS HEAT STRESS CONDITIONS TO
CONTINUE ACROSS THE AREA THROUGH WEDNESDAY. A MIX OF EXCESSIVE
HEAT WARNINGS AND HEAT ADVISORIES WILL COVER THE 105+ HEAT INDEX
VALUES THROUGH THEN. BY THURSDAY, RAIN CHANCES AND THE PROXIMITY
OF THE FRONTAL BOUNDARY IN THE REGION MAKE HAZARDOUS HEAT LESS
CERTAIN FOR THURSDAY OR LATER AT THIS TIME. /NF/
AVIATION
(12Z TAFS)
ISSUED AT 624 AM CDT TUE JUL 21 2026
VFR CONDITIONS WILL PREVAIL WITH LIGHT AND VARIABLE WINDS AND FEW
TO SCATTERED MID TO HIGH CLOUDS. /SAS/
PRELIMINARY POINT TEMPS/POPS
JACKSON 97 77 97 76 / 20 10 20 0
MERIDIAN 96 76 96 75 / 0 0 0 20
VICKSBURG 97 79 97 76 / 20 10 10 0
HATTIESBURG 96 77 97 77 / 0 0 30 20
NATCHEZ 98 78 100 76 / 30 10 20 0
GREENVILLE 99 79 95 74 / 20 10 0 0
GREENWOOD 99 77 97 74 / 20 10 0 0
JAN WATCHES/WARNINGS/ADVISORIES
MS...HEAT ADVISORY UNTIL 10 AM CDT THIS MORNING FOR MSZ026-027-036-
040>043-047>049-053>055-059-060.
EXTREME HEAT WARNING FROM 10 AM THIS MORNING TO 9 PM CDT THIS
EVENING FOR MSZ026-027-036-040>043-047>049-053>055-059-060.
EXTREME HEAT WARNING UNTIL 9 PM CDT THIS EVENING FOR MSZ018-019-
025-034-035.
HEAT ADVISORY UNTIL 9 PM CDT THIS EVENING FOR MSZ028>033-037>039-
044>046-050>052-056>058-061>066-072>074.
LA...HEAT ADVISORY UNTIL 10 AM CDT THIS MORNING FOR LAZ007>009-015-
016-023>026.
EXTREME HEAT WARNING FROM 10 AM THIS MORNING TO 9 PM CDT THIS
EVENING FOR LAZ007>009-015-016-023>026.
AR...HEAT ADVISORY UNTIL 10 AM CDT THIS MORNING FOR ARZ074.
EXTREME HEAT WARNING FROM 10 AM THIS MORNING TO 9 PM CDT THIS
EVENING FOR ARZ074.
EXTREME HEAT WARNING UNTIL 9 PM CDT THIS EVENING FOR ARZ075.
NF/NF/SAS20
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