textproduct: Jackson
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Dangerous levels of heat stress will continue today, mainly over the western half of the area.
- Hot temperatures will continue for the remainder of the week and weekend, but lower humidity should help to reduce heat stress.
DISCUSSION
Issued at 206 PM CDT Wed Sep 16 2026
Through Thursday: Continued hot and humid along with dry weather. Latest satellite imagery/RAP analysis showed the circulation around a large and anomalously stout mid level high centered over the Tennessee valley. This large high will shift slightly west through Thursday. Latest surface analysis had a >1020mb centered over the southern Appalachians that will continue to ridge back across our CWA through Thursday. Although near record high temperatures are possible at Greenville and Greenwood Thursday, drier air from the east will lower humidity and therefore help mitigate heat stress concerns. Peak heat index values Thursday will approach 105F over the western half of the CWA with lower heat index values to the east. /22/
High pressure will remain over the Southeast CONUS heading into the weekend. The high pressure will gradually move westward and an upper- lvl low will increase moisture/humidity across the area late Sunday into next week. Diurnal rain chances will return Monday and last through the mid-week. Although 15-30% rain chances will be possible across the area, heat stress concerns are likely as highs remain above-average to near record high temps over the forecast period. /SW/
AVIATION
(18Z TAFS) Issued at 1258 PM CDT Wed Sep 16 2026
VFR conditions wl prevail through the TAF period. /22/
PRELIMINARY POINT TEMPS/POPS
Jackson 72 95 69 97 / 0 0 0 0 Meridian 70 95 69 99 / 0 0 0 0 Vicksburg 73 95 69 97 / 0 0 0 0 Hattiesburg 70 93 67 96 / 0 0 0 0 Natchez 73 95 68 97 / 0 0 0 0 Greenville 74 99 72 100 / 0 0 0 0 Greenwood 72 98 71 100 / 0 0 0 0
JAN WATCHES/WARNINGS/ADVISORIES
MS...Heat Advisory until 7 PM CDT this evening for MSZ018-019-025>037- 040>043-047>049-053>055-059>064-072.
LA...Heat Advisory until 7 PM CDT this evening for LAZ007>009-015-016- 023>026.
AR...Heat Advisory until 7 PM CDT this evening for ARZ074-075.
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