textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress will remain a concern through this weekend.

- Afternoon shower and thunderstorm chances in our forecast area will trend lower by mid week, and then begin to return this weekend.

DISCUSSION

Issued at 137 PM CDT Mon Aug 10 2026

Through Tuesday: Local radars were showing isolated showers and thunderstorms developing over the northeast portions of the CWA. This activity will increase in coverage this afternoon before dissipating shortly after sunset. The convection is expected to bring very little relief to the heat and humidity. Heat stress will remain the main concern this afternoon and again Tuesday. A Heat Advisory will remain in effect until this evening for the area generally along and west of Interstate 55 and will be in effect again Tuesday. This is the area where the most oppressive conditions will occur but the remainder of the CWA will see peak heat index values around 105F this afternoon and again Tuesday. /22/

Through the weekend: An anomalously strong ridge remains over the Four Corners region this, but the Bermuda High is becoming the dominant feature in our region as it retrogrades from the Atlantic to the Gulf Coast. As it treks westward this week, it will become a stronger limiting factor for rain chances. High PWAT values near 2 inches will persist in the region through midweek, so increasing heat and humidity will push our daily heat index values over 105 degrees each day. Showers and thunderstorms will bring spotty relief from the heat. Drier air will wrap from the Gulf and southwestern US as the ridge becomes more prevalent, and PWAT values will fall closer to 1.5 inches by on Friday. Model guidance is favoring a new surge of tropical moisture by Saturday into Sunday though, and the stout ridge and deep moisture could result in more widespread significant dangerous heat (heat index values near or greater than 110 degrees) by the weekend. Overnight low temps will only fall into the mid or upper 70s later in the week, worsening heat stress for vulnerable populations and those without air conditioning. And rain chances will creep back in from the south and east as humidity increases there.

Residents are reminded that heat is particularly dangerous for the elderly, the sick, and those without access to reliable air conditioning. Be sure loved ones and neighbors have access to a cool place to stay in periods of more intense heat and humidity. /NF/22/

AVIATION

(18Z TAFS) Issued at 1235 PM CDT Mon Aug 10 2026

Isolated SHRA/TSRA were noted developing on local radars in the ne and south. This activity will increase this aftn and affect mainly the east and southern TAF sites. Away from any TSRA,VFR conditions and a light wind wl prevail through the TAF period. /22/

PRELIMINARY POINT TEMPS/POPS

Jackson 75 95 76 96 / 10 10 0 0 Meridian 75 94 76 95 / 10 10 0 10 Vicksburg 75 95 76 96 / 10 0 0 0 Hattiesburg 75 97 75 97 / 10 10 0 10 Natchez 74 96 75 97 / 0 10 0 0 Greenville 77 96 78 98 / 10 10 0 0 Greenwood 76 94 77 96 / 10 10 10 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 8 PM CDT this evening for MSZ018-019-025- 034>036-040>043-047-048-053-054-059>062.

Heat Advisory from 11 AM to 8 PM CDT Tuesday for MSZ018-019-025- 034>036-040>043-047-048-053-054-059>062.

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 Tuesday 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 Tuesday for ARZ074-075.