textproduct: Jackson

KEY MESSAGES

- Dangerous levels of heat stress are expected during the late morning and afternoon hours each day over the first half of this week.

DISCUSSION

Issued at 300 PM CDT Sun Sep 13 2026

Through Monday: As anticipated previously, storms have once again developed with strong daytime heating and are mainly focused over the southeast two thirds of the area. A favorable environment for microbursts with vertical totals near 26 deg C and DCAPE near 1500 j/kg is supporting a few intense storms with strong to marginally severe wind gusts. This storm threat should continue to the early evening hours. The storm threat for Monday should shift a little farther south and west with coverage a little less. Otherwise, dangerous heat continues to be the primary concern, and the heat advisory was extended to Monday and expanded to include northeast portions of the forecast area. /EC/

Tuesday through Sunday: The subtropical high will strengthen over our region as we go later into the week with the center of the high just to our north. This will result in low level flow becoming more easterly over the mid to latter portions of the week, which will eventually usher in a relatively drier airmass, especially by Thursday. This airmass will still support hot days, but with dewpoints dropping into 60s and perhaps the 50s, this will notably reduce heat stress danger through the end of the week. While days will still be relatively warm, mornings will see temps dipping into the 60s more often across much of the area. Deep layer moisture will begin to increase again around Friday into Saturday, with returning potential for diurnal convection each day. /DL/EC/

AVIATION

(18Z TAFS) Issued at 1209 PM CDT Sun Sep 13 2026

Isolated afternoon thunderstorms are expected today with more coverage over southeastern zones, as a result HBG/PIB/MEI have TS reflected in a tempo running from 1322Z-1402Z today. While JAN/HKS will have -SHRA for the same time period. All other sites VFR for the period, as probs remain too low to confidently carry hydrometeors in the TAF; to reiterate however, expect isolated showers with embedded thunder throughout the CWA this afternoon as PoPs hover in the 35% range. /OAJ/

PRELIMINARY POINT TEMPS/POPS

Jackson 73 97 73 97 / 10 20 0 0 Meridian 72 100 73 99 / 10 0 0 0 Vicksburg 74 97 74 97 / 10 20 0 0 Hattiesburg 74 97 73 97 / 10 10 0 10 Natchez 74 97 74 97 / 10 40 10 10 Greenville 75 100 74 99 / 10 30 0 0 Greenwood 73 100 73 100 / 10 20 20 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory until 7 PM CDT this evening for MSZ018-019-025>027- 034>036-040>043-047>049-053>055-059>064-072.

Heat Advisory from 11 AM to 7 PM CDT Monday for MSZ018-019- 025>037-040>044-047>049-053>055-059>064-072.

LA...Heat Advisory until 7 PM CDT this evening for LAZ007>009-015-016- 023>026.

Heat Advisory from 11 AM to 7 PM CDT Monday for LAZ007>009-015- 016-023>026.

AR...Heat Advisory until 7 PM CDT this evening for ARZ074-075.

Heat Advisory from 11 AM to 7 PM CDT Monday for ARZ074-075.