textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress will remain a concern through late next 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 135 PM CDT Sat Aug 8 2026

Through Sunday: Heat and humidity will be the main concern through the period but local radars were showing isolated showers and thunderstorms developing over the CWA. This activity will increase over the next several hours with the greatest coverage expected generally over the northwest half of the CWA. This activity will see a distinct diurnal trend however, guidance suggests a continuation of convection through the night in our northwest. Latest satellite imagery/RAP analysis still showed our CWA in the weakness between a mid level ridge to our west and to our east. This weakness combined with daytime heating of our moist airmass was leading to the convective development. Where convection has not developed, temperatures were climbing in the 90s and combining with high humidity for heat indices climbing in the lower 100s. Peak heat indices will top out near 105F this afternoon across the southern half of the area. The whole CWA is expected to see peak heat index values near 105F Sunday along with lower chances for rain than today. /22/

By Monday, the upper trough over our area that has allowed for greater coverage of rain and storms should lift north, resulting in a broad midlevel high over the region. This means our weather should remain largely unchanged day-to-day, with any modification coming from mesoscale features. As the midlevel high strengthens and becomes centered over our area, rain chances will decrease and dangerous heat will increase. With decreasing storm coverage through mid week, have introduced an "elevated" heat graphic mostly for the Delta, but including the Jackson metro as well. There may eventually need to be a corresponding heat advisory which will be evaluated in future updates. The heat is likely to persist through the period and hazard graphics may be adjusted throughout. /SAS/

AVIATION

(18Z TAFS) Issued at 1251 PM CDT Sat Aug 8 2026

Isolated -SHRA/-TSRA were noted developing over much of the area at 1730Z and isolated-scattered -TSRA wl likely affect most TAF sites this aftn. Away from TSRA, VFR conditions wl prevail through the TAF period. /22/

PRELIMINARY POINT TEMPS/POPS

Jackson 73 94 74 94 / 10 40 10 30 Meridian 74 93 74 92 / 10 40 20 50 Vicksburg 73 93 74 94 / 20 40 10 20 Hattiesburg 74 95 74 94 / 20 40 20 50 Natchez 73 95 73 95 / 10 20 10 30 Greenville 73 92 75 94 / 50 50 10 20 Greenwood 72 91 73 93 / 40 50 10 30

JAN WATCHES/WARNINGS/ADVISORIES

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