textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress conditions are expected through at least the middle of this week. Daily max heat index values will be near 105 to 115 degrees.

- Chances for showers and thunderstorms begin to return mid to late week.

DISCUSSION

Issued at 345 AM CDT Sun Aug 16 2026

An especially intense subtropical ridge axis will maintain it's position over our region for the next few days. A hot low level thermal ridge axis (e.g., H850 near 24 deg C) will support high temperatures approaching 104 deg F in the ArkLaMiss Delta region, and the 100 to 103 deg F range elsewhere. A few record high temperatures will likely be broken, and heat indices will be hot enough to meet extreme heat warning criteria, in spite of greater mixing. Have maintained the elevated to significant heat graphic and upgraded to an extreme heat warning for western portions of the area accordingly. Later this week and into next weekend, there are indications that strong westerlies will increase over the northeast CONUS. This will help to suppress and weaken the ridge, and allow for greater convective rainfall chances in our area. This could be a time to monitor for marginal severe weather threats. /EC/

AVIATION

(06Z TAFS) Issued at 1240 AM CDT Sun Aug 16 2026

VFR conditions will prevail through the forecast period at all TAF sites./KP/

PRELIMINARY POINT TEMPS/POPS

Jackson 100 78 100 77 / 0 0 10 10 Meridian 101 77 100 76 / 10 10 30 10 Vicksburg 99 78 100 77 / 0 10 0 0 Hattiesburg 102 78 101 78 / 20 10 30 20 Natchez 101 77 100 77 / 0 0 0 0 Greenville 101 80 103 78 / 0 0 20 10 Greenwood 100 78 101 75 / 0 0 20 10

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 3 AM CDT early this morning for MSZ026>033- 037>039-044>046-050>052-056>058-065-066-074.

Heat Advisory from 9 PM this evening to 8 PM CDT Monday for MSZ026>033-037>039-044>046-050>052-056>058-065-066-074.

Extreme Heat Warning until 8 PM CDT Monday for MSZ018-019-025- 034>036-040>043-047>049-053>055-059>064-072-073.

LA...Heat Advisory until 3 AM CDT early this morning for LAZ007-015- 023-024.

Heat Advisory from 9 PM this evening to 8 PM CDT Monday for LAZ007-015-023-024.

Extreme Heat Warning until 8 PM CDT Monday for LAZ008-009-016- 025-026.

AR...Heat Advisory until 3 AM CDT early this morning for ARZ074.

Heat Advisory from 9 PM this evening to 8 PM CDT Monday for ARZ074.

Extreme Heat Warning until 8 PM CDT Monday for ARZ075.