textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress intensifies areawide today, & continues through the week.

DISCUSSION

Issued at 301 AM CDT Sun Jun 28 2026

Today through Saturday...As they gradually slide northeast and east of the Lower Mississippi River Valley, high pressure at both the surface and aloft will maintain a presence across the forecast area this week. This will provide some opportunity for the CWA to dry out over at least the next couple days. However the trade-off of having these dry days, will be that of a rather hot and humid stretch of weather existing across the region throughout this forecast period. Currently, the next best chance for rain will come Tuesday, with chances remaining in the forecast through week's end, as disturbances caught up in easterly flow aloft on the southern periphery of the aforementioned high aloft, affect the forecast area.

In the meantime, increasing heat stress will be the primary story during this forecast stretch. This afternoon, highs will warm into the low and middle 90s, but will increase to the mid and upper 90s Monday through the remainder of the period. This, coupled with dew points in the 70s, will yield afternoon heat index values above the century mark throughout the forecast period. At the moment, heat indices look their highest Monday and onward as values could reach up to around 110F. However come Tuesday, and again continuing through Saturday, increased rain chances each afternoon could have an affect on just how high heat index readings get. I'll continue to advertise these dangerous heat stress conditions in the HWO this week. We will also evaluate on a daily basis whether or not, at a minimum, a "Heat Advisory" is needed for portions of the forecast area. Currently, a "Heat Advisory" in effect for mainly western and southern portions of the area from noon today through 9 PM Monday. This advisory will likely need to be expanded eastward in the coming days. /19/

AVIATION

(12Z TAFS) Issued at 626 AM CDT Sun Jun 28 2026

VFR flight categories will prevail at area TAF sites through this 12Z forecast period. Winds will increase from the southwest between 8-13 knots through the morning, with a few higher gusts possible. /19/

PRELIMINARY POINT TEMPS/POPS

Jackson 93 75 95 76 / 0 0 0 0 Meridian 94 75 97 75 / 0 0 0 0 Vicksburg 93 76 94 76 / 0 0 0 0 Hattiesburg 97 75 98 76 / 0 0 0 0 Natchez 94 75 96 75 / 0 0 0 0 Greenville 93 76 94 76 / 0 0 0 0 Greenwood 94 75 96 75 / 0 0 0 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from noon today to 9 PM CDT Monday for MSZ018-019- 025-034-035-040>042-047-048-053>055-059>066-072>074.

LA...Heat Advisory from noon today to 9 PM CDT Monday for LAZ007>009- 015-016-023>026.

AR...Heat Advisory from noon today to 9 PM CDT Monday for ARZ074-075.