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Peck, Louisiana Weather Forecast Discussion

093
FXUS64 KJAN 210520
AFDJAN

Area Forecast Discussion National Weather Service Jackson MS 1220 AM CDT Sun Sep 21 2025

...New AVIATION...

.MESOSCALE UPDATE... Issued at 933 PM CDT Sat Sep 20 2025

Most of the day`s convection has dissipated but similar to this time last evening, isolated showers were across portions of the Highway 84 corridor. These showers will gradually dissipate by midnight and no additional rain is expected. The remainder of the forecast was on track. /22/

&&

.DISCUSSION... Issued at 1252 PM CDT Sat Sep 20 2025

Tonight through Tuesday...Despite the Autumn Equinox coming Monday, September 22, 2025 at 1819Z, the next few days will essentially be an extension of what`s been a hot summer this year. Highs through Tuesday will continue to warm into the low and middle 90s with lows from the middle 60s to lower 70s. Moisture will subtly increase across the region during this time, causing increasingly humid conditions each day. Rain chances will remain diurnally driven and in the form or mainly isolated showers and storms, with a stray storm or two intense enough to produce some gusty winds. These will gradually subside during the early evening hours. Things will begin to change across the area late Tuesday night into Wednesday. /19/

Wednesday through Friday...The forecast gets more interesting during the middle of next week. Global models have trended more amplified with a shortwave trough expected to dig southward through the Mississippi Valley region. As the trough digs and deep layer flow increases, a developing surface wave and strengthening warm sector will lower pressures over the forecast area Wednesday. This could result in a threat for strong to marginally severe multicell clusters and perhaps a few supercells if the cold frontal timing and storm initiation coincide with peak heating. We are currently not messaging for severe weather in our graphics and products, but it may be a potential threat to monitor as we go through the next few days.

Going into late week, the trough should slowly shift east, which could prolong the potential for beneficial rainfall as cyclonic flow lingers. Otherwise, temperatures will cool to near typical values for late September. /EC/

&&

.AVIATION... (06Z TAFS) Issued at 1220 AM CDT Sun Sep 21 2025

Aside from a few high clouds and light southerly winds, quiet conditions will prevail across all TAF sites with VFR conditions prevailing. /CR/

&&

.PRELIMINARY POINT TEMPS/POPS... Jackson 69 92 69 92 / 10 10 0 10 Meridian 67 92 67 92 / 10 10 0 10 Vicksburg 69 92 70 93 / 10 10 10 20 Hattiesburg 69 93 68 95 / 10 10 0 10 Natchez 67 91 69 93 / 10 10 0 20 Greenville 69 93 71 92 / 10 10 20 30 Greenwood 69 93 71 92 / 20 10 10 20

&&

.JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. &&

$$

22/19/CR

NWS JAN Office Area Forecast Discussion

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