textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress will remain a concern through late week.

- Afternoon showers and thunderstorms will be possible over at least portions of the forecast area each day of the forecast period.

DISCUSSION

Issued at 129 PM CDT Sun Aug 9 2026

Through Monday: Heat and humidity will be the main concern through the period but local radars were showing isolated showers and thunderstorms developing over the eastern half of the CWA again this afternoon. This activity will increase over the next several hours with the greatest coverage expected over the northeast. This activity will see a distinct diurnal trend and dissipate shortly after sunset. Latest satellite imagery/RAP analysis still showed our CWA in the weakness between a mid level ridge to our west and to our southeast. This weakness combined with daytime heating of our moist airmass will lead to at least isolated convection again Monday afternoon. Wl maintain a moist airmass and with temperatures climbing back into the 90s and combining with high humidity, peak heat index values will top out between 106F and 110F for the area along and just east of the Mississippi river. Elsewhere across the CWA less oppressive conditions are expected with peak heat index values near 105F. A Heat Advisory will remain in effect for the area along and just east of the Mississippi river. /22/

The Bermuda high will propagate westward broadly over the region leading to steadily decreasing rain chances and increasing temperatures. Dangerous heat continues to be the primary concern over the next week and an "elevated" continues to be messaged for mainly west of I-55. It appears heat will peak on Wednesday as this is when both temperatures and dewpoint will be maximized. Thereafter later in the week, temperatures will increase as the high strengthens and the 850 thermal ridge peaks, but simultaneously this will lead to slightly lower dewpoints and deeper mixing potential and thus slightly lower heat indices. The summer regime is likely to persist through the period and hazard graphics may be adjusted throughout. /SAS/

AVIATION

(18Z TAFS) Issued at 1227 PM CDT Sun Aug 9 2026

Isolated -SHRA have developed in the ne and se. Isolated -TSRA wl be psbl this aftn at GTR-PIB-HBG. Away from -TSRA, VFR conditions wl prevail through the TAF period. /22/

PRELIMINARY POINT TEMPS/POPS

Jackson 74 94 75 95 / 10 10 10 10 Meridian 74 93 75 93 / 10 20 10 20 Vicksburg 74 94 75 95 / 10 10 10 10 Hattiesburg 74 94 74 96 / 10 20 10 20 Natchez 73 94 74 95 / 10 10 10 10 Greenville 75 95 76 96 / 10 10 0 10 Greenwood 74 94 75 94 / 10 20 10 10

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from 11 AM to 8 PM CDT Monday for MSZ018-019-025- 034-035-040-041-047-053-059>061.

LA...Heat Advisory from 11 AM to 8 PM CDT Monday for LAZ008-009-016- 024>026.

AR...Heat Advisory from 11 AM to 8 PM CDT Monday for ARZ075.