textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress continues into this weekend.

- "Limited Threat" for flash flooding early next week.

DISCUSSION

Issued at 131 PM CDT Fri Jun 12 2026

Tonight through next Thursday...High levels of heat and humidity will continue across the CWA into the weekend. Relief will be temporary and in the form of isolated to scattered showers and storms during the afternoon hours. For the rest of this afternoon, an outflow boundary dropping south toward the Highway 82 corridor, will spark some convection across northern portions of the area through early this evening. Said convection will begin dissipating shortly after sunset. Although severe storms aren't forecast, gusty winds, frequent lightning, and heavy downpours will be possible with the more intense activity.

A "Heat Advisory" will remain in effect for a good portion of the CWA through Saturday, with afternoon heat index values peaking around 105 yet again. This advisory may be extended into Sunday. However, better rain chances in addition to more cloud cover, could halt the extension or result in some modification to the current layout of affected counties/parishes in the advised area.

Although the heat tapers off during the start of the work week, moisture will be at an abundance across the region. Moisture associated with a tropical wave meandering about the Yucatan and the western gulf, will overspread the Lower Mississippi River Valley next week, resulting in precipitable H2O values hovering between 2.25-2.5 inches. As a trough digs south and swings east across the nation's mid-section and into and through our region through Wednesday, a front will sink south into the forecast area. As it slows/stalls and eventually washes out Monday through Wednesday, and potentially into Thursday, multiple bouts of heavy rain is forecast to affect the forecast area.

Currently a "Limited Threat" for flash flooding is being advertised across the entire forecast area during this time. Copious amounts of deep moisture over the region looks to result in high rainfall rates in a short amount of time, along with the training of convection which could result in flash flooding. This is still a few days out. Therefore, please continue to monitor the latest forecast as adjustments to the threat area will likely be made. /19/

AVIATION

(18Z TAFS) Issued at 1226 PM CDT Fri Jun 12 2026

Flight categories are ranging from VFR/MVFR this afternoon due to some scattered to broken cumulus across the region. Ceilings will gradually improve through the afternoon, but some isolated to scattered convection along the Highway 82 corridor late in the day, could again result in a degradation of categories for a 1-3 hour period. VFR flight categories will then prevail overnight and into Saturday morning. Winds will subside this evening, and will be calm to light from the south around 3-5 knots. Winds will be more southwesterly on Friday between 5-10 knots. /19/

PRELIMINARY POINT TEMPS/POPS

Jackson 76 94 77 93 / 10 10 10 40 Meridian 76 95 76 94 / 10 30 10 20 Vicksburg 77 94 77 93 / 0 0 0 50 Hattiesburg 75 94 76 94 / 10 10 10 20 Natchez 76 95 76 94 / 0 0 0 40 Greenville 77 94 78 91 / 10 10 20 70 Greenwood 76 95 78 92 / 10 10 20 80

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 8 PM CDT Saturday for MSZ018-019-025-034-035- 040>043-047>049-053>055-059>065-072>074.

LA...Heat Advisory until 8 PM CDT Saturday for LAZ009-016-024>026.

AR...Heat Advisory until 8 PM CDT Saturday for ARZ075.