textproduct: Jackson

KEY MESSAGES

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

- Isolated to scattered severe storms capable of damaging wind gusts are possible in the Highway 82 corridor this evening into early tonight.

MESOSCALE UPDATE

Issued at 712 PM CDT Sat Aug 22 2026

Rest of tonight...

Unsettled pattern remains on track across the region. Storms have developed along shortwave diving southeast into the MS River corridor. This is tapping into deep unstable environment and deep layer shear of 25-35kts is driving robust convection into the Mid South region to just into north MS. Based on the overall southeast propagation and coordination with SPC and local offices, the severe thunderstorm watch was expanded eastward to the MS/AL border. These areas in the Golden Triangle could see some storm potential over the next couple of hours. The watch continues through 10PM. Some showers and storms will persist into the evening to overnight hours, but any robust convection that makes it in will mostly wind down before midnight. Heat and humidity is somewhat improving but still have a large portion of heat indices in excess of 95-100F degrees and temperatures still hovering above 90-95F degrees. Heat advisory continues through 8PM with additional heat concerns into Sunday. Lows will remain seasonably warm (70-75F). Updates are out. /DC/

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

(00Z TAFS) Issued at 712 PM CDT Sat Aug 22 2026

VFR flight conditions prevail through the period. TSRA may sneak into the Highway 82 corridor between 23/01-03Z Sunday and SHRA persist a few more hours. Low flight restrictions to IFR/LIFR visibility and damaging wind gusts (30-50mph). Winds will be light and variable tonight and northerly (sustained/gusts under 10mph) into Sunday. /DC/

PRELIMINARY POINT TEMPS/POPS

Jackson 75 99 74 91 / 10 10 50 70 Meridian 74 98 73 91 / 10 10 50 60 Vicksburg 74 97 75 91 / 10 20 40 60 Hattiesburg 74 99 75 93 / 0 30 30 60 Natchez 75 100 76 95 / 0 10 20 40 Greenville 73 98 73 91 / 40 10 40 70 Greenwood 72 96 72 89 / 40 10 40 70

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.

Heat Advisory from 11 AM to 8 PM CDT Sunday for MSZ018-019-025- 034>036-040>043-047>049-053>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 Sunday 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 Sunday for ARZ074-075.