Special Weather Statement, NWS New Orleans, LA

Area Forecast Discussion
National Weather Service New Orleans LA
1254 PM CDT Thu Aug 21 2025

...New SHORT TERM, LONG TERM, AVIATION, MARINE...

.SHORT TERM...
(This evening through Friday night)
Issued at 1245 PM CDT Thu Aug 21 2025

An approaching trough will linger over the area tonight through
Saturday morning. Southerly surface winds will help to advect
moist air into the area. This pattern combined with deep Gulf
moisture will produce scattered to numerous showers and storms
across the area. PWs will be around 2 inches, which will be around
the 75-90th percentiles for SPC sounding climatology. Rainfall
rates will be fairly efficient with any storm development. Generally,
these storms will occur during the afternoon and early evening
peak heating hours tonight and Friday. The main risk with these
storms will be gusty subsevere winds (40-50mph) and locally heavy
rainfall. Localized street flooding could be an issue, as well,
especially if a storm sets up or stalls over an urban area.
Temperatures will be generally in the low 90s with dewpoints in
the upper 70s. MSW

&&

.LONG TERM...
(Saturday through Wednesday night)
Issued at 1245 PM CDT Thu Aug 21 2025

The trough will slide south into the Gulf over the weekend. Rain
chances will remain during the afternoon and evening hours
Saturday and Sunday as the system moves slowly southward.
Conditions will likely be a little drier on Sunday. The main
concerns with these storms will be subsevere gusty winds
(30-50mph) and locally heavy rainfall.

Another cold front moves through the area Monday into Tuesday,
helping to reinforce some cooler feeling temperatures. Generally,
rain chances will be increased Monday afternoon and evening and
Tuesday afternoon and evening. These storms will likely be later
initiation, later into the evening, due to the more northerly flow
pattern that will set up over the area. Generally, temperatures
Monday through Wednesday will be in the low 90s with dewpoints in
the low 70s and upper 60s across the area.

Conditions start to dry out a little Wednesday and especially
toward the end of next week. Still a lot of uncertainty, but
generally expecting a drier pattern to start setting up from mid-
week onward. MSW

&&

.AVIATION...
(18Z TAFS)
Issued at 1245 PM CDT Thu Aug 21 2025

VFR conditions prevail at all area airports. TEMPO groups are in
effect, which will include drops to MVFR conditions, for afternoon
and evening showers and storms at most area airports. MSW

&&

.MARINE...
Issued at 1245 PM CDT Thu Aug 21 2025

Outside of showers and thunderstorms mostly favorable winds and seas
are expected through the upcoming weekend. Winds will remain mostly
onshore at or less than 10 knots. Winds and sea will increase in and
around convection.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  72  90  71  92 /  30  60  20  40
BTR  73  91  73  92 /  40  70  20  40
ASD  72  90  71  91 /  50  70  40  70
MSY  78  93  77  92 /  40  80  40  70
GPT  74  90  74  89 /  50  70  40  70
PQL  73  90  72  90 /  40  70  50  70

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...None.
MS...None.
GM...None.
&&

SHORT TERM...MSW
LONG TERM....MSW
AVIATION...MSW
MARINE...MSW

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Special Weather Statement
National Weather Service New Orleans LA
121 PM CDT Thu Aug 21 2025

LAZ084-211845-
Southern Livingston LA-
121 PM CDT Thu Aug 21 2025

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
LIVINGSTON PARISH THROUGH 145 PM CDT
...

At 121 PM CDT, Doppler radar was tracking a strong thunderstorm near
Whitehall, or 17 miles southwest of Hammond. This thunderstorm was
nearly stationary.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Whitehall and Killian.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in New Orleans.

&&

LAT...LON 3042 9061 3032 9048 3029 9054 3025 9055
      3022 9060 3022 9063 3023 9066 3020 9068
      3032 9078
TIME...MOT...LOC 1821Z 326DEG 4KT 3032 9065

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

TJS