Flash Flood Warning 49, NWS New Orleans, LA

792 
WGUS74 KLIX 312330
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
630 PM CDT Sun May 31 2026

LAC051-089-312340-
/O.CAN.KLIX.FF.W.0049.000000T0000Z-260601T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-St. Charles LA-
630 PM CDT Sun May 31 2026

...FLASH FLOOD WARNING FOR NORTHWESTERN JEFFERSON AND NORTHEASTERN 
ST. CHARLES PARISHES HAS BEEN REPLACED WITH A FLOOD ADVISORY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

&&

LAT...LON 2989 9037 2990 9047 2999 9047 3002 9040
      3002 9028 3000 9025 2995 9027 2992 9030

$$

KLG

Area Forecast Discussion
National Weather Service New Orleans LA
1143 AM CDT Sun May 31 2026

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

.KEY MESSAGES...
Updated at 1100 AM CDT Sun May 31 2026

- Drier pattern through Monday. Rain chances return to ~50-60%
Tuesday afternoon.

- Summertime temps are here with highs around 90 degrees and heat
  indicies of 100 to 105 through Tuesday.

-Temperatures return to seasonable, in the mid 80s, by Wednesday
 and lasting through the end of the week.

&&

.SHORT TERM...
(Now through Wednesday)
Issued at 1100 AM CDT Sun May 31 2026

Ridging continues to dominate the upper level pattern, though fairly
broad which still allows for isolated rain chances to sneak in. This
ridging looks to hold today and through the short term period, but
is does begin to retrograde westward later in the short term period
as trough digs through the East Coast. With this ridging pattern,
temperatures are running a couple degrees above average with most
areas seeing highs in the upper 80s to lower 90s. Not only are the
MaxTs running in the 90s for many, but ApparentT's are running in
the 100-105F range as well. These values are just below our heat
advisory criteria, but this we are rather early in the heat season
so groups that are sensitive to heat are still at risk for heat
induced illnesses. This is reflected in the HeatRisk outputs showing
moderate to major risk in many areas today through Tuesday.

In terms of convection, the best areas for initiation today looks to
be along the sea breeze on the MS coast in the afternoon hours. Any
outflow boundaries hanging around the area could also bring some
isolated storms. DCAPE values are forecast to be in the realm of
~1000J/Kg which could cause some localized downburst potential.
Otherwise, Monday for the most part looks to see similar conditions
as today with isolated convection along boundaries. A
weak frontal boundary looks to move into the area late in the
short term period, bringing an increase in PoPs for Tuesday and
Tuesday evening. It is worth at least a mention that a couple of
the CAMs have a line of showers and storms diving south from the
TN Valley area. It decays before reaching here in some runs, but a
couple runs do bring some of the lingering storms down towards
the MS coast. It is worth keeping an eye on.

&&

.LONG TERM...
(Wednesday night through Saturday)
Issued at 1100 AM CDT Sun May 31 2026

Heading into the long term period ridging does build back into the
region, but with an increase in onshore flow by Thursday we can
expect moisture to increase. This keeps scattered chances for
showers and storms each day. These storms are expected to be mainly
diurnally driven, with storms developing along sea and lake
breeze boundaries along with any local outflow boundaries sitting
over the area. Pulling some forecast soundings shows most days
with fairly high DCAPE, so we may see a continued risk of
localized downbursts with afternoon storms.

The increase in rain chances will help suppress the temperatures
some, with afternoon highs back into the mid 80s each day through
the end of the forecast period. Dew points will be ever so
slightly lower as well following the frontal boundary moving
through Wednesday, which will help it feel a bit better outside
for the long term on top of the cooler high temperatures.

&&

.AVIATION...
(18Z TAFS)
Issued at 1100 AM CDT Sun May 31 2026

Prevailing VFR at all terminals late this morning. This is
expected to hold through the day outside of the potential for an
isolated storm at a couple terminals, mainly GPT or MCB. These
storms chances aren't quite high enough to mention in the forecast
but are worth keeping an eye on. Early Monday will see some light
fog chances, mainly at MCB, bringing MVFR conditions. This fog
would burn off rather quickly after sunrise.

&&

.MARINE...
Issued at 1100 AM CDT Sun May 31 2026

A broad area of high pressure will keep conditions over the waters
relatively benign the next couple days.  Winds will be light at 10
knots or less and seas will remain below 2 feet. The seabreeze cycle
will lead to some variability in wind direction near the coast, and
a few thunderstorms could fire up in relation to this
seabreeze/landbreeze cycle.  Any storms will be short-lived and will
produce locally gusty winds and lightning.  A weak cold front is
still expected to slip into the waters Tuesday night into Wednesday.
 Winds will turn northeasterly and increase to 10 to 15 knots in the
wake of this weak front.  Thunderstorm activity will be a bit more
widespread as the front moves through, and a few stronger storms
with high wind gusts could develop.  By Thursday and Friday, the
front will dissipate and a return to a prevailing southeast wind is
expected. However, the pressure gradient over the northern Gulf will
tighten up as a low forms over the western Gulf and a broad high
remains centered over the Southeastern states.  This will push winds
into the 15 to 20 knot range by the end of the week and seas will
increase to 3 to 5 feet.

&&

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

SHORT TERM...HL
LONG TERM....HL
AVIATION...HL
MARINE...HL

Special Weather Statement
National Weather Service New Orleans LA
149 PM CDT Sun May 31 2026

LAZ070-311915-
Lower St. Bernard LA-
149 PM CDT Sun May 31 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN ST.
BERNARD PARISH THROUGH 215 PM CDT
...

At 149 PM CDT, Doppler radar was tracking a strong thunderstorm
capable of producing waterspouts over marine areas 16 miles east of
Shell Beach, or 25 miles south of Waveland. This thunderstorm was
nearly stationary.

HAZARD...Waterspouts and winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally
         hazardous waters. Gusty winds could knock down tree limbs
         and blow around unsecured objects.

This storm will remain over mainly rural areas of northeastern St.
Bernard Parish.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

If on or near marine areas, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles from
the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not be
caught on the water in a thunderstorm.

&&

LAT...LON 2989 8921 2983 8926 2980 8955 2982 8965
      2989 8964 2990 8962 2996 8961 3000 8951
      3000 8937 2998 8936 2995 8937 2993 8935
TIME...MOT...LOC 1849Z 275DEG 2KT 2992 8941

WATERSPOUT...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

KLG

Special Weather Statement
National Weather Service New Orleans LA
501 PM CDT Sun May 31 2026

LAZ098>100-312230-
Central St. Charles LA-Upper St. Charles LA-Lower St. Charles LA-
501 PM CDT Sun May 31 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN ST.
CHARLES PARISH THROUGH 530 PM CDT
...

At 501 PM CDT, Doppler radar was tracking a strong thunderstorm over
New Sarpy, or over Hahnville. This thunderstorm was nearly
stationary.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Hahnville, Norco, Destrehan, Luling, Taft, New Sarpy, St. Rose,
Boutte, Ama, and Killona.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 217 and 220.
 Interstate 310 between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 2989 9047 3000 9046 3004 9040 3004 9034
      3000 9028 2997 9028 2992 9032 2988 9037
TIME...MOT...LOC 2201Z 160DEG 0KT 2999 9038

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

KLG