textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress is expected across portions of the forecast area over the next several days.

- Isolated severe storms capable of damaging wind gusts are possible this evening into early tonight.

DISCUSSION

Issued at 1222 PM CDT Sat Aug 22 2026

This afternoon through Monday:

Another hot afternoon is expected as dangerous heat conditions continue across the region. Highs in the upper 90s/near 100 degrees with heat indices between 105-110F west of I-55. A Heat Advisory will remain in effect until this evening. In addition to hot conditions, a disturbance from the Central Plains will push through late this afternoon. Combining with daytime heating to provide thunderstorm chances north of I-20. A Slight (2 out of 5) risk for severe weather for extreme northwest MS (Bolivar, Sunflower, Leflore,and Grenada counties) and a marginal (1 out of 5) risk north of I-20. Primary hazard of concern will be damaging wind gusts.

Persistent hot/humid conditions will continue Sunday. Dangerous heat conditions is expected with greatest heat stress over the southwest where heat indices reach 110 degrees are expected. Another heat advisory will be issued on Sunday for all of our northeast LA parishes and portions of southwest/west/central/southeast MS. A weak frontal boundary will push southward, briefly "cooling" temps to the lower 90s with heat indices near 105 for Monday.

Tuesday through Saturday:

High pressure will retrograde towards the Southwest CONUS with a trough axis setting up across the Southern CONUS. As a result, northwest flow across the area will allow a few weak disturbances to increase afternoon rain chances throughout the week. Heat and humidity will be on the rebound as heat indices begin to increase to 110 degrees west of I-55. Heat headlines and advisories will likely be needed as the week progress. /SW/

AVIATION

(18Z TAFS) Issued at 1222 PM CDT Sat Aug 22 2026

VFR conditions are expected to prevail through the TAF period at all sites along and south of the Interstate 20 corridor. Northern TAF sites will have a greater chance for showers and thunderstorms generally between 23Z today and 06Z Sunday. Brief restrictions to visibility or ceilings will be possible in addition to gusty winds with stronger storms. /NF/

PRELIMINARY POINT TEMPS/POPS

Jackson 74 98 74 92 / 20 10 30 60 Meridian 73 98 73 92 / 10 10 10 50 Vicksburg 74 98 74 92 / 10 10 10 50 Hattiesburg 74 99 74 94 / 0 10 10 50 Natchez 75 99 75 95 / 0 10 10 20 Greenville 74 97 74 93 / 40 10 40 60 Greenwood 72 96 72 91 / 40 10 40 60

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 8 PM CDT this evening for MSZ018-019-025- 034>036-040>043-047>049-053>055-059>064-072.

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

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