textproduct: Jackson

KEY MESSAGES

- Dangerous levels of heat stress are expected during the late morning and afternoon hours early this week. Heat danger will begin to decrease later in the week.

DISCUSSION

Issued at 245 AM CDT Mon Sep 14 2026

Through Tuesday: Heat is still the main story for today as mid/upper ridging builds across the region. High temperatures will continue to reach the upper 90s up to around 100 across the ArkLaMiss Delta, with heat indices peaking in the 105-110F range areawide. Based on yesterday's observations, the heat advisory has been expanded to include the entire forecast area for today. An advisory will likely be needed again for a portion of the area tomorrow, however, drier easterly flow will begin to arrive and this may begin to limit heat stress for areas east of I-55. Given considerable deep layer moisture lingering across the area, isolated to scattered afternoon convection is expected again today. A few of these storms could again produce strong wind gusts. As drier air begins to arrive tomorrow, coverage is expected to decrease.

Wednesday through next Monday: Continuing easterly flow will usher in a relatively drier airmass through the end of the work week. This airmass will still support hot days, with temps still approaching the triple digits in the ArkLaMiss Delta. But with dewpoints dropping into 60s and perhaps the 50s, heat stress will become less of a concern through the end of the week. It is still possible a heat advisory may be needed for some areas mainly west of I-55 on Wednesday, but heat related alerts are unlikely for the remainder of the week. While days will still be quite warm with above normal temps, mornings will see temps dipping into the 60s in many areas. Deep layer moisture will begin to increase again this weekend, with returning potential for diurnal convection each day. Though it will still be warm, high temps are expected to regress closer to seasonal normals around the beginning of next week. /DL/

AVIATION

(12Z TAFS) Issued at 623 AM CDT Mon Sep 14 2026

Isolated to scattered aftn TSRA may result in lower flight restrictions over the west and cntrl TAF sites today but away from any TSRA, VFR conditions wl continue to prevail through the end of the TAF period. /22/

PRELIMINARY POINT TEMPS/POPS

Jackson 97 73 97 73 / 30 20 10 0 Meridian 99 72 99 73 / 20 0 0 0 Vicksburg 97 73 96 74 / 30 20 10 0 Hattiesburg 97 74 97 74 / 20 0 10 0 Natchez 96 73 96 73 / 50 20 10 0 Greenville 99 74 99 75 / 30 20 10 0 Greenwood 99 73 100 74 / 20 20 0 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for MSZ018-019-025>066-072>074.

LA...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 11 AM this morning to 7 PM CDT this evening for ARZ074-075.