textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress will remain a concern with humidity in the region 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 416 AM CDT Fri Aug 7 2026

An abnormally strong upper-level ridge is centered over the Four Corners region today, and looks to remain there through late next week. To the east, the Bermuda High remains in place over the western Atlantic. But that will actually retrograde toward the southeastern CONUS and Gulf Coast by early next week. Meanwhile, westerly flow with the jet stream will remain deflected across the northern CONUS until later next week when a more pronounced ridge-trough pattern establishes over the country.

Our forecast area and broader region will therefore remain mostly beneath the weak troughing pattern between the ridges into next week. PWAT values remain soupy with onshore flow and deep tropical moisture being reinforced with an easterly wave Saturday into Sunday. Given the lack of strong ridging overhead, reinforcing moisture influx, and daily chances for showers and storms, the confidence in widespread 105-110 heat index values is not great enough to justify Heat Advisory headlines at this point in time. Peak heat index values each day will be near 105 degrees, especially over the next several days. "Limited" heat stress messaging is in line with the expected forecast, but this kind of hot and humid weather is still dangerous for sensitive populations, especially the elderly or people without functioning air conditioning in the home. Care should be taken to limit strenuous activities in mid day, and frequent breaks with cool water and shade are advised for anyone working or playing outdoors this time of year. /NF/

AVIATION

(18Z TAFS) Issued at 1234 PM CDT Fri Aug 7 2026

VFR conditions will prevail through the period. Scattered showers and thunderstorms this afternoon are possible at sites along and south of the I-20 corridor (<30% chance). Storms should diminish around sunset. Briefly MVFR visibility is possible at HBG and PIB tomorrow morning. /SAS/

PRELIMINARY POINT TEMPS/POPS

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

JAN WATCHES/WARNINGS/ADVISORIES

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