textproduct: Jackson

KEY MESSAGES

- "Limited Threat" for dangerous heat stress today.

- After a brief break in heat impacts, heat stress builds back in mid and late next week.

DISCUSSION

Issued at 230 AM CDT Sat Aug 1 2026

Today through next Friday...Troughing will increases across the region this weekend. This will force a frontal boundary south into and through the forecast area today into tonight. This, along with the addition of daytime heating, will aid in the development of showers and storms across the CWA into this evening. A storm or two could become intense enough during this time, and produce gusty winds. Frequent lightning and heavy downpours can be expected with all of today's convection.

While hot humid conditions will continue today, cloud cover associated with said convection, and slightly drier air filtering into the region in the front's wake, will provide some temporary relief from the oppressive heat that's gripped the region for sometime. Still, a "Limited Threat" for dangerous heat stress will exist across much of the the CWA this afternoon. Here, the combination of highs in the low to middle 90s and dew points in the low to middle 70s, will yield afternoon heat index values near 105F. Again, the slightly drier air that advects into the area in the wake of the front will hang around the region Sunday into Monday. Highs will generally range from the upper 80s to mid 90s each day, with dew points from the upper 60s to lower 70s.

Unfortunately, this'll all be short-lived as we move into the mid and latter portions of the week. Strong high pressure aloft will again re-assert itself across the Lower Mississippi River Valley during this time. High temperatures will again begin climbing back into the mid and upper 90s areawide. Moisture levels will also begin creeping up, possibly again leading to another bout of dangerous heat stress as we end the forecast period. Rain chances also will be tough to come by during this time, with only an isolated shower or storm possible. /19/

AVIATION

(12Z TAFS) Issued at 620 AM CDT Sat Aug 1 2026

Despite a frontal boundary sinking south through the region today into this evening, VFR flight categories will prevail at area TAF sites during this 12Z forecast package. Isolated to scattered convection will exist across the area ahead of and along the front. This could result in a brief 1-3 hour period of mainly MVFR flight categories if observed on station. Winds will be breezy from the south southwest around 10 knots, with some higher gusts between 15-20 knots, ahead of this boundary. Behind it, winds will become northwesterly this evening and sustained around 5 knots. /19/

PRELIMINARY POINT TEMPS/POPS

Jackson 95 71 89 70 / 10 20 0 0 Meridian 93 71 89 70 / 30 30 0 0 Vicksburg 95 71 90 71 / 30 10 0 0 Hattiesburg 95 74 92 71 / 10 30 0 0 Natchez 96 71 92 71 / 10 10 0 0 Greenville 95 72 89 70 / 0 0 0 0 Greenwood 93 70 87 70 / 30 0 10 10

JAN WATCHES/WARNINGS/ADVISORIES

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