textproduct: Jackson

KEY MESSAGES

- Heat index readings in the 100F-105F range will result in increasing heat stress today and Monday.

- A few rounds of thunderstorms are possible today through Tuesday. There is a marginal risk for these storms being severe with damaging wind gusts and hail up to quarter size Monday, mainly during the afternoon and evening.

DISCUSSION

Issued at 310 AM CDT Sun May 31 2026

Through Tuesday: We're off to a mostly quiet start this morning, with patchy fog in a few areas. Later today, with a rather moist airmass lingering over the area and ample heating anticipated, scattered diurnal convection is expected to develop again this afternoon. Some guidance has consistently hinted at greater coverage today than the past couple of days. The Euro has also indicated the potential for an upstream line of storms to work its way toward the area as early as this afternoon, with a few HREF members hinting at the same. Speaking of which, as we head through tonight, upper flow over the region will become northwesterly. Within this perturbed regime, there will be potential for multiple convective complexes to develop and move southeast/ southward across our area through at least Monday night. SPC continues to highlight a marginal severe risk over northeastern portions of the CWA for Monday, but an expansion of this risk in either area or time is possible as CAM guidance begins to better resolve these individual systems. By Tuesday, an approaching cold front will begin to limit upstream development, but we could see storms develop over our area ahead of the front. Throughout this time frame, a severe storm or localized flooding threat cannot be ruled out, depending on how these individual systems evolve.

Outside of the busier convective threats, temps will soar into the 90s across most of the area today and tomorrow. With humidity still remaining high, this will yield heat index readings in the 100F-105F range in many areas. We continue to advertise a limited heat stress threat. Higher heat stress could also carry over into Tuesday over the southern half of the area ahead of the aforementioned front.

Tuesday night through Saturday: It is becoming more certain that a backdoor front will bring a few days of relief across most of our area from the increasing heat stress, with dewpoints dipping into the 50s and 60s and low temps deep into the 60s over most of the area Wednesday and Thursday. This will also curtail rain chances each day. Low level moisture will steadily begin to recover from west to east Friday into Saturday with a resurgence of 70s dewpoints and mainly diurnal convection by next weekend. /DL/

AVIATION

(12Z TAFS) Issued at 624 AM CDT Sun May 31 2026

Patchy fog is ongoing at a few area terminals this morning, mainly in east MS. This fog should diminish by shortly after sunrise, with VFR conditions prevailing across the area. Isolated to scattered TSRA will develop later this afternoon into early this evening, which may result in brief visibility reductions at any impacted sites. Patchy fog will be possible again late tonight into early Monday morning, which may result in categorical reductions at some sites, mainly in south and east MS. /DL/

PRELIMINARY POINT TEMPS/POPS

Jackson 91 74 92 73 / 20 10 20 20 Meridian 92 72 92 72 / 20 20 40 30 Vicksburg 91 75 92 74 / 20 10 20 10 Hattiesburg 92 74 92 73 / 30 30 40 20 Natchez 93 75 93 74 / 10 10 20 20 Greenville 91 74 93 73 / 50 20 10 40 Greenwood 91 73 92 72 / 40 10 30 40

JAN WATCHES/WARNINGS/ADVISORIES

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