textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress this week, with afternoon heat index values generally between 105F-110F.

- Dangerously hot conditions tomorrow with prolonged heat stress possible. Heat indices 110+ possible.

- Marginal Risk (1 out of 5) for isolated severe storms across the area today.

DISCUSSION

Issued at 301 AM CDT Wed Jul 1 2026

Wednesday through next Tuesday:

High pressure continues to encompass the southeast CONUS, providing ongoing dangerous heat over the region. Persistent highs ranging in the mid-upper 90s, combined with mid 70 dewpoints will result in heat indices between 110-115 degrees in the MS Delta/portions of central MS areas and heat indices up to 110 degrees outside of those areas. An Excessive Heat Warning will go in effect at 10AM in areas with heat indices 110+ and a Heat Advisory will remain in effect elsewhere. Heat precautions should be considered, especially with long-term outdoor exposure. A weak disturbance will progress over the area, providing isolated shower/storm chances through the evening. With an unstable airmass present, a marginal (1 out of 5) risk for severe weather will be possible during the afternoon and evening hours.

High pressure will gradually slide northeastward Thursday, keeping afternoon rain chances and dangerous heat over the area. Extensions of the heat products will be evaluated on a day to day basis. Hot conditions will continue into the 4th of July weekend. A couple of disturbances may provide diurnal showers and storms over the holiday and Sunday. Dangerous heat along with rain chances will persist into next week. /SW/

AVIATION

(06Z TAFS) Issued at 1254 AM CDT Wed Jul 1 2026

VFR flight conditions with light winds will prevail through the period. An isolated shower/storm will be possible this afternoon. /SW/

PRELIMINARY POINT TEMPS/POPS

Jackson 95 75 94 75 / 40 20 20 0 Meridian 96 76 95 75 / 20 10 10 0 Vicksburg 95 75 94 76 / 30 20 10 0 Hattiesburg 95 75 95 75 / 30 20 10 10 Natchez 95 75 94 75 / 50 50 10 0 Greenville 96 76 95 76 / 20 10 20 10 Greenwood 99 76 97 76 / 40 20 10 10

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 9 PM CDT this evening for MSZ026>033-037>039- 044>046-050>052-056>058-060>066-072>074.

Heat Advisory until 10 AM CDT this morning for MSZ018-019-025- 034>036-040>043-047>049-053>055-059.

Extreme Heat Warning from 10 AM this morning to 9 PM CDT this evening for MSZ018-019-025-034>036-040>043-047>049-053>055- 059.

LA...Heat Advisory until 9 PM CDT this evening for LAZ007-008-015-023- 024-026.

Heat Advisory until 10 AM CDT this morning for LAZ009-016-025.

Extreme Heat Warning from 10 AM this morning to 9 PM CDT this evening for LAZ009-016-025.

AR...Heat Advisory until 9 PM CDT this evening for ARZ074.

Heat Advisory until 10 AM CDT this morning for ARZ075.

Extreme Heat Warning from 10 AM this morning to 9 PM CDT this evening for ARZ075.