textproduct: Jackson

KEY MESSAGES

- Showers and thunderstorms could bring locally heavy rainfall to portions of the area today.

- Monitoring the potential for increasing heat stress later this week.

DISCUSSION

Issued at 331 AM CDT Sun Jun 7 2026

Today through tonight: A shortwave trough crossing the Southern plains to Mid MS Valley will continue to bring very humid southerly flow into the forecast area today. While the trough will be weakening and height falls into our forecast area negligible, very moist air combined with daytime heating will support considerable coverage of showers and storms. Given the very moist and precip-efficient air, we can expect locally heavy rainfall, especially over north central into eastern portions of the area where the lingering ascent and moisture convergence should be greatest. Overall, the heavy rain and flash flood threat remains too low to introduce formal messaging in the HWO graphics, but will monitor trends in this regard.

Going through the work week into next weekend: Rain chances will diminish early this week as the trough moves out and is replaced by a strengthening subtropical ridge. The wet vegetative state from recent above normal rainfall will support very humid boundary layer conditions, and this combined with increasing temperatures and relatively cloud free conditions associated with the ridge will bring a threat for dangerous heat. Current guidance indicates that heat indices/WBGT and the overall heat risk should peak Wed- Fri when highs are expected to reach the low/mid 90s. If these trends continue then formal messaging will eventually be needed in the HWO graphics. /EC/

PRELIMINARY POINT TEMPS/POPS

Jackson 89 74 88 72 / 50 10 20 0 Meridian 86 73 86 71 / 70 30 40 10 Vicksburg 89 75 89 74 / 40 10 20 0 Hattiesburg 87 73 87 70 / 80 20 30 0 Natchez 90 75 90 73 / 30 10 10 0 Greenville 87 75 90 75 / 80 20 30 10 Greenwood 87 74 90 74 / 90 20 30 10

JAN WATCHES/WARNINGS/ADVISORIES

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