textproduct: Jackson

KEY MESSAGES

- Increasing heat and seasonably humid conditions will result in elevated heat stress concerns through the upcoming week.

- Afternoon showers and thunderstorms will be increasingly scarce over the next few days, but coverage may begin to increase again by next week.

DISCUSSION

Issued at 203 AM CDT Tue Aug 11 2026

Upper ridging presently centered over the northeastern Gulf Coast will build over the Deep South through the end of the week, resulting in increasing subsidence and lower rain chances over the next few days. A few diurnal showers and storms still cannot be ruled out each day, but coverage will be lesser compared to the past few days. However, a muggy airmass will persist, and combined with increasing heat, it will result in elevated heat stress concerns through the week. For today, a Heat Advisory remains in effect generally west of I-55, where heat indices are more likely to persist in the 105-110F range over a longer duration of the daytime. Of course, it will still be uncomfortably warm and humid even outside of the advisory.

By the end of the week into early next week, daytime high temps will approach the triple digits at many sites, and several warm minimum temp records in the upper 70s to near 80 will be threatened. With heat indices still into the triple digits, additional heat advisories are almost certain. There is at least some hope by the end of the week into early next week for increased mixing to bring dewpoints down into the 60s during the daytime periods. While this may not be enough to get us out of the heat stress danger zone, it could at least keep us out of the significant heat stress category. Otherwise, an influx of greater deep layer moisture early next week will yield a return to daily isolated to scattered diurnal convection across the area. /DL/

AVIATION

(06Z TAFS) Issued at 142 AM CDT Tue Aug 11 2026

VFR conditions are expected to prevail at the TAF sites through the period, though some patchy shallow BR cannot entirely be ruled out before 13Z today. /NF/

PRELIMINARY POINT TEMPS/POPS

Jackson 96 77 97 76 / 0 0 0 0 Meridian 95 76 96 77 / 10 0 10 0 Vicksburg 95 76 96 77 / 0 0 0 0 Hattiesburg 97 76 98 77 / 10 0 10 10 Natchez 96 75 97 75 / 0 0 0 0 Greenville 96 78 98 79 / 0 0 0 0 Greenwood 94 77 96 78 / 10 0 0 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from 11 AM this morning to 8 PM CDT this evening for MSZ018-019-025-034>036-040>043-047-048-053-054-059>062.

LA...Heat Advisory from 11 AM this morning to 8 PM CDT this evening for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 11 AM this morning to 8 PM CDT this evening for ARZ074-075.