textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress intensifies areawide this weekend through the middle of next week.

DISCUSSION

Issued at 234 PM CDT Sat Jun 27 2026

This afternoon through next Saturday...

Hot and quiet weather conditions will persist across our CWA this afternoon thanks to high pressure at both the surface and aloft. Sky conditions will be mostly sunny across the area. The mostly sunny skies combined with daytime heating will allow for afternoon highs to peak in the low to mid 90s. In addition to highs peaking in the 90s, dew points in the 70s will cause heat indices be at and above 100 F degrees across much of the area. Regarding the heat graphic valid for the rest of this afternoon, no changes have been made and the "Limited" risk will continue to be advertised for our entire forecast area. Quiet conditions will persist heading into this evening . Sky conditions will start off relatively clear by midnight. Nighttime temperatures will dip into the mid/upper 70s.

As we head into early Sunday morning, clouds will begin to increase in coverage from the north. Although HREF fog guidance is beginning to show low probabilities (around 10-20%) of patchy fog mainly along and south of Hwy 84, there is not enough support from the REFS to suggest widespread fog potential. Fog graphics will not be introduced at this time given the low probability of fog development highlighted by HREF dense fog guidance, however shallow patchy fog will be possible particularly after dawn.

Dangerous heat stress will be the primary focus for the extended forecast period starting this Sunday through early next week Tuesday. Daytime highs on Sunday will peak into the low to mid 90s. Monday and Tuesday will see highs peak into the mid to upper 90s. With dewpoints forecasted to reach in the 70s each afternoon, heat index values will exceed above 105 degrees across much of our forecast area. Given that Sunday will be a transition period for dangerous heat, we will take the areawide "Limited" heat graphic and upgrade most of the area to an "Elevated" risk later tonight to maintain consistency with our heat messaging and to cover areas where the Heat Advisory has been issued for Sunday. The areawide "Elevated" heat risk will continued to be advertised heading into next week.

A Heat Advisory has been issued for most of our forecast area including portions of southeast Arkansas, and all of our northeast Louisiana parishes from noon Sunday to 9 PM Monday. At the moment, Monday and Tuesday's heat indices still look their highest as values could reach up to around 110 degrees. As we get closer to Monday and Tuesday, it is possible that the Heat Advisory could get expanded further east to cover the rest of our CWA.

Rain and storm chances will begin to increase Tuesday through Saturday as a few disturbances caught up in easterly flow affect the area. This could have an affect on how high heat index readings could get. Heat trends will continue be monitored as we get closer to the middle of next week and heat headlines/advisories and warnings may eventually be needed as well. /CR/

AVIATION

(18Z TAFS) Issued at 234 PM CDT Sat Jun 27 2026

VFR conditions are expected through the next 24 hours, while the Pine Belt (PIB and HBG) cannot rule out a brief drop to MVFR visibility prior to daybreak. However, confidence was too low to introduce during this 18Z TAF cycle. Southerly winds are gusty in the Delta (sustained around 15 to 20mph and gusts around 25mph at GLH and GWO) while a touch less elsewhere. Surface winds lighten this evening and similar but a little relaxed Sunday. /DC/

PRELIMINARY POINT TEMPS/POPS

Jackson 75 93 75 95 / 0 0 0 0 Meridian 75 94 74 97 / 0 0 0 0 Vicksburg 76 93 75 94 / 0 0 0 0 Hattiesburg 75 96 75 97 / 0 0 0 0 Natchez 75 94 75 95 / 0 0 0 0 Greenville 77 92 76 94 / 0 0 0 0 Greenwood 76 93 75 96 / 0 0 0 0

JAN WATCHES/WARNINGS/ADVISORIES

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

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