textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress conditions will continue into this weekend.

- Tropical Bertha is forecast to stay south of our forecast area, with the probability of hazardous impacts in our area being very low at this time.

DISCUSSION

Issued at 342 AM CDT Wed Jul 22 2026

With Tropical Storm Bertha continuing to move slowly west along the Gulf Coast today, we will see an uptick in northerly/northeasterly breezes. This won't bring a relief from the heat and humidity, however. The influence of ridging aloft, and deeper moisture especially in the zone along the Mississippi River valley, will result in peak heat index values of around 110 to 115 degrees at most locations. There is a slight chance for showers or thunderstorms in the region today, but heavy rain is expected to stay south of our area.

A cool front stalling in the region today will serve as a focus for afternoon shower and thunderstorm development into the weekend. At least some limited heat stress is expected for Friday and Saturday, and then expanding influence from the ridge aloft is likely to push us back into Elevated and Significant heat stress by early next week. /NF/

AVIATION

(12Z TAFS) Issued at 620 AM CDT Wed Jul 22 2026

As of 1120Z, all TAF sites are reporting VFR conditions to start off the period. VFR ceilings will prevail across the area through 12Z. South and east TAF sites could see ceilings briefly drop down to MVFR conditions through 16Z. After 16Z VFR conditions will resume areawide and a gusty ne-e wind 17-20kts wl develop and prevail through the afternoon. Isolated to scattered TSRA wl be psbl in the southeast and east after 19Z. Rain chances will begin to decrease in the southeast and east after 00Z. VFR conditions will prevail across the area Wednesday evening. Heading into Wednesday night, ceilings will begin to gradually drop to MVFR conditions. /CR/

PRELIMINARY POINT TEMPS/POPS

Jackson 96 77 93 75 / 20 20 40 20 Meridian 95 76 92 75 / 20 20 50 20 Vicksburg 97 78 94 76 / 20 20 30 10 Hattiesburg 96 77 91 76 / 30 40 60 10 Natchez 99 78 94 75 / 20 20 40 10 Greenville 95 76 93 74 / 10 0 0 10 Greenwood 97 76 94 74 / 20 10 30 20

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from 10 AM this morning to 7 PM CDT this evening for MSZ018-026>033-036>039-044>046-050>052-056>058-066-074.

Extreme Heat Warning from 10 AM this morning to 7 PM CDT this evening for MSZ019-025-034-035-040>043-047>049-053>055- 059>065-072-073.

LA...Extreme Heat Warning from 10 AM this morning to 7 PM CDT this evening for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 10 AM this morning to 7 PM CDT this evening for ARZ074-075.