textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress will persist across the western half of the area on Tuesday.

DISCUSSION

Issued at 159 PM CDT Mon Sep 7 2026

A cumulus field has developed this afternoon in two areas - across central LA and south MS and across east central MS. Much like yesterday, low level lapse rates are quite steep given the ample surface heating and low level moisture. This will provide potential for another round of isolated to scattered storms this afternoon, with lower chances in our northern/western areas where even fair weather clouds are more sparse. DCAPE remains high across the area, so wet microbursts resulting in damaging wind gusts will be possible in some storms, with greater odds further south where deep layer moisture is greater. Convection will diminish in coverage after sunset.

Tuesday and Wednesday: The remnant surface front will continue to stall and wash out over the next few days, with a Southeast US surface ridge becoming a bigger player. The position of this high favors the advection of a somewhat drier and...less hot...air mass being wedged around the Appalachians. What would this mean for us? Temperatures that are still above average but not as high as what we have been seeing and increasingly marginal heat indices, with sites less likely to reach heat advisory criteria each day. As this modified airmass begins to move into the eastern portion of the area tomorrow, we have clipped the heat advisory to only cover our western half. And it's possible by Wednesday an advisory will not be needed at all. Diurnal convection is still possible each day where deep layer moisture will be greater, favored over southern/western areas tomorrow then across the south on Wednesday.

Thursday through next Monday: Another weak cold front will approach from the north at the end of the week but stall before reaching our area. Increasing deep layer moisture will pool south of this feature, resulting in higher rain chances over the back half of the forecast period. Though it will still be hot, greater prevalence of clouds and rain may continue to temper the heat enough to avoid critical heat stress thresholds being met this weekend into early next week. /DL/

AVIATION

(06Z TAFS) Issued at 1251 AM CDT Tue Sep 8 2026

VFR conditions will prevail through the period. Some BR will be possible across northern TAF sites between 10-15Z but probabilities were to low to include in TAFs. Isolated -TSRA may also be possible Tuesday afternoon after 20Z near southern TAF sites. Winds will become southerly by 12Z at all TAF sites./KP/

PRELIMINARY POINT TEMPS/POPS

Jackson 95 73 95 72 / 20 0 10 0 Meridian 94 73 95 72 / 10 0 10 0 Vicksburg 96 73 94 73 / 30 10 10 0 Hattiesburg 93 73 92 73 / 30 10 40 10 Natchez 96 73 94 73 / 50 10 20 0 Greenville 100 74 97 73 / 30 10 10 0 Greenwood 97 73 96 72 / 30 10 0 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for MSZ018-019-025>028-034>036-040>043-047-048-053-054- 059>061.

LA...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for ARZ074-075.