textproduct: Jackson

KEY MESSAGES

- Dangerous heat stress conditions will intensify across the area this weekend into early next week, with heat index values eventually topping 110 degrees.

DISCUSSION

Issued at 444 AM CDT Fri Jun 26 2026

Heat is the main story and the only story today. Zonal flow across the CONUS with broad west-east ridge over the Gulf Coast today will break down into the weekend and early next week. Amplifying pattern will see ridge strengthen and become centered over the Mississippi River Valley through early next week. 500mb heights eventually peak at around 597dam over the Ohio River Valley mid week. The combination of heat beneath this ridge and Gulf Coast humidity will push heat index values to near 105 degrees in some places again today, but increasingly over 105 degrees tomorrow and Sunday. Heat Advisories may be needed for the area in this time frame. And then Monday and Tuesday should see those values climb above 110 degrees, with an Excessive Heat Warning possibly needed for portions of the forecast area. As the core of the ridge shifts northward, easterly flow and returning tropical moisture will bring rain chances back to at least southern portions of the forecast area. Expect it to remain hot and humid with summery thunderstorms heading into early July. /NF/

AVIATION

(12Z TAFS) Issued at 618 AM CDT Fri Jun 26 2026

As of 1118Z, PIB is currently reporting MVFR conditions. Ceilings will begin to improve to VFR across PIB by 14Z. GLH and GWO could briefly see gusty sw winds 18-20 kts later this afternoon. Winds will gradually start to subside after 00Z Saturday. Otherwise, VFR conditions will prevail across the area throughout the entire TAF period. /CR/

PRELIMINARY POINT TEMPS/POPS

Jackson 92 74 92 75 / 0 0 0 0 Meridian 93 75 93 75 / 0 0 0 0 Vicksburg 90 75 91 75 / 0 0 0 0 Hattiesburg 94 75 95 74 / 0 0 0 0 Natchez 92 75 93 75 / 0 0 0 0 Greenville 90 76 91 76 / 0 0 0 0 Greenwood 91 76 92 76 / 0 0 0 0

JAN WATCHES/WARNINGS/ADVISORIES

MS...None. LA...None. AR...None.