textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress conditions will increase across the forecast area today.

- Several disturbances will bring rain chances through the week ahead including the potential for isolated to scattered severe storms this evening into Thursday morning.

DISCUSSION

Issued at 224 AM CDT Wed Aug 26 2026

Today into tonight...

Our area remains on the eastern periphery of a large 596dam high as an upper disturbance is expected to drop into our northeast zones later this evening into tonight. Prior to more widespread storm development, temperatures across the area will warm into the mid 90s F with upper 90s F near and west of I-55. With continued high humidity, heat stress is expected to increase today. In the northeast where peak heat index values will be around 105 F where a "Limited" threat area for dangerous heat remains advertised. Elsewhere, an "Elevated" threat for dangerous heat will be remains for heat indices between 105-110 F. As the evening disturbance dives southeastward into our area from the northwest, it will encounter this unstable, hot and humid environment. Sufficient deep layer flow enhanced by organized thunderstorm outflows will likely allow for some of this convection to become strong to severe with damaging wind gusts being the main threat. /22/86/

Thursday into next week...

The ongoing northwest flow pattern across the region will persist through the end of the work week. This will continue to provide decent rain chances across the forecast area as disturbances embedded in this flow continue to move across the region.

Thunderstorms from the previous overnight should be diminishing into early Thursday morning, as instability likewise weakens. Chances for showers and storms will remain in the forecast Thursday afternoon and again on Friday, especially across locations along and southeast of the Natchez Trace Parkway.

Over the weekend and into early next week, high pressure aloft will begin to re-assert itself across the Lower Mississippi River Valley. This will result in lessening rain chances across the forecast area. Unfortunately, the trade-off will again be increasing heat. By next Monday, some need for at least a "Limited" threat of increased heat stress will likely be required across portions of the forecast area with higher outlooks possible. /19/86/

AVIATION

(00Z TAFS) Issued at 844 PM CDT Tue Aug 25 2026

VFR conditions are expected to prevail. Showers or thunderstorms are possible - especially near northern TAF sites - but confidence in thunder impacts was too low to include at this time. /NF/

PRELIMINARY POINT TEMPS/POPS

Jackson 96 72 92 70 / 30 60 50 40 Meridian 95 72 91 71 / 50 50 60 50 Vicksburg 98 72 92 70 / 20 70 50 30 Hattiesburg 96 73 91 71 / 50 50 80 50 Natchez 99 73 92 71 / 20 60 50 40 Greenville 96 71 93 70 / 30 70 30 10 Greenwood 95 70 92 69 / 30 40 30 20

JAN WATCHES/WARNINGS/ADVISORIES

MS...None. LA...None. AR...None.