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 330 PM CDT Tue Aug 11 2026

An intense subtropical ridge will strengthen and generally become centered over the forecast area as we go through the remainder of the week and weekend and into early next week. While temperatures will increase in the next few days, the more prominent heat will develop this weekend when the low level flow is expected to obtain a more westerly component. An anomalous thermal ridge will extend from the Southern Plains eastward into our region with H850 temperatures potentially approaching 27 deg C, especially in the Delta region where westerly flow will be most pronounced. These values if realized correlate with record high temperatures, but on the flip side, the airmass would be highly mixed meaning that lower RH values would help to lessen heat indices. The net result should still be at least elevated levels of dangerous heat continuing through the forecast. There is currently a heat advisory for Wednesday, and expect additional heat advisories as we go farther out in time.

It appears the heat will peak in the Sun-Tue time frame with compressional heating ahead of an approaching cold, then expect the potential the ridge to break down as we go later into next week. Until that happens, the increased anticyclonic flow will limit diurnal convective coverage resulting in meager rainfall totals. /EC/

AVIATION

(00Z TAFS) Issued at 623 PM CDT Tue Aug 11 2026

VFR conditions wl prevail through the TAF period. /22/

PRELIMINARY POINT TEMPS/POPS

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

JAN WATCHES/WARNINGS/ADVISORIES

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

Heat Advisory from 11 AM to 8 PM CDT Wednesday for MSZ018-019- 025>066-072>074.

LA...Heat Advisory until 8 PM CDT this evening for LAZ007>009-015-016- 023>026.

Heat Advisory from 11 AM to 8 PM CDT Wednesday for LAZ007>009- 015-016-023>026.

AR...Heat Advisory until 8 PM CDT this evening for ARZ074-075.

Heat Advisory from 11 AM to 8 PM CDT Wednesday for ARZ074-075.