Severe Thunderstorm Warning 64, NWS New Orleans, LA

Area Forecast Discussion
National Weather Service New Orleans LA
1240 AM CDT Sat May 9 2026

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

.KEY MESSAGES...
Updated at 1230 AM CDT Sat May 9 2026

- An active weather pattern will continue through the weekend with
  several rounds of showers and thunderstorms in the forecast.

- The main concern will be potential for locally heavy rainfall,
  especially today. High rainfall rates in some storms will be
  capable of overwhelming drainage capacity and leading to ponding
  of water in low lying and poor drainage areas, with the
  heaviest storms potentially leading to isolated flash flooding.
  While severe weather is a less likely threat, one or two strong
  to severe storms cannot be ruled out. IF any storms become
  severe, the main threats will be damaging wind gusts and hail.

- Residents should remain weather-aware through the weekend and
  plan ahead for potential street flooding - especially if normal
  commuting routes include flood-prone underpasses and other poor
  drainage spots.

&&

.SHORT TERM...
(Now through Monday)
Issued at 1230 AM CDT Sat May 9 2026

Upper features at late evening included a trough from southern
Missouri into west Texas, with ridging over the desert Southwest.
A strong shortwave was moving into Idaho and Montana. At the
surface, a stationary boundary was off the Louisiana coast, and
another from the Ohio Valley to Oklahoma to west Texas. High
pressure was off the Carolina coast. Isolated showers and
thunderstorms were occurring along the Interstate 10/12 corridor
from Slidell to near Opelousas. Temperatures were in the upper 60s
and lower 70s. The scattered to locally numerous showers should
continue overnight.

What seems to be fairly consistent is that another disturbance
will race through the local area during the daytime hours, leading
to yet another round of widespread showers and storms, especially
along/north of the interstate corridor. With precipitable water
values near 1.9 inches, efficient rainfall in some of these
storms will continue to lead to at least an isolated flash flood
threat. We will have a Slight Risk of excessive rainfall across
much of the area today.

Going into Sunday it'll be more of the same. Another fast-moving
disturbance will move through the local area some time
Sunday/Sunday night, forcing a cold front through the area with
another round of showers and storms accompanying it. This activity
currently looks to remain a bit more progressive, which should
help limit the flash flood threat.

The global models have slowed the timing of the trough passage
down somewhat, so that precipitation could linger into the daytime
hours Monday before departing. It might be late in the day before
clearing occurs, which would hold high temperatures down a bit.

&&

.LONG TERM...
(Monday night through Friday)
Issued at 1230 AM CDT Sat May 9 2026

All of the long term guidance remains in good agreement that a deep
layer northwesterly flow regime and strong riding in the low to mid
levels will remain in place through the end of the week.  Ample
subsidence and dry air advection into the area will keep a strong
mid-level capping inversion in place through the week, and this will
help limit cloud development each day. At most, some fair weather
cumulus will develop beneath the inversion as temperatures warm into
the low to mid 80s each afternoon.  The dry airmass in place will
also allow for a large diurnal range of around 30 degrees early in
the week.  Overnight lows will easily fall into the low to mid 50s
over inland areas the lower 60s along the Louisiana coast both
Monday and Tuesday night.  Some gradual modification of overnight
lows will occur later in the week as low level moisture slowly
increases.  However, lows will still cool a good 20 degrees into the
low to mid 60s each night.  Overall, a very pleasant stretch of
weather is expected for the upcoming workweek.

&&

.AVIATION...
(06Z TAFS)
Issued at 1230 AM CDT Sat May 9 2026

A stationary front will continue to linger near the area for much
of the day. Periods of shower and thunderstorm activity will
continue for the remainder of the night, but may stay north of
KHUM, KNEW and KMSY. IFR conditions with visibilities of 1 to 2
miles and ceilings of 300 to 800 feet can be expected with the
heaviest storms. Outside of the convective threat, prevailing MVFR
ceilings of 1000 to 2000 can be expected at the terminals through
the daytime hours, with some potential to improve to VFR, at least
temporarily, beyond 00z Sunday.

&&

.MARINE...
Issued at 1230 AM CDT Sat May 9 2026

Winds have been a bit more easterly over the coastal waters this
evening with the stationary front off the Louisiana coast straddling
our coastal waters. As the boundary moves northward later today,
winds will again become south to southeast winds at 10 to 15
knots, and will persist through the weekend. Another frontal
boundary will move into the waters Sunday night into Monday
morning, bringing offshore winds to the waters for early next
week. Winds should remain below headline criteria through the
period, with the greatest concern being scattered to numerous
showers and storms, mainly today through Sunday night or Monday
morning.

&&

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

SHORT TERM...RW
LONG TERM....PG
AVIATION...RW
MARINE...RW

Special Weather Statement
National Weather Service New Orleans LA
143 AM CDT Sat May 9 2026

MSZ087-090700-
Southern Harrison MS-
143 AM CDT Sat May 9 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
HARRISON COUNTY THROUGH 200 AM CDT
...

At 143 AM CDT, Doppler radar was tracking a strong thunderstorm over
Long Beach, moving east at 35 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
Gulfport, Biloxi, Long Beach, and Gulfport Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3038 8884 3037 8886 3036 8901 3030 8920
      3039 8918 3041 8913 3042 8899
TIME...MOT...LOC 0643Z 274DEG 32KT 3037 8912

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

KLG

Special Weather Statement
National Weather Service New Orleans LA
359 AM CDT Sat May 9 2026

LAZ076>080-MSZ086-090930-
Southeast St. Tammany LA-Western Orleans LA-Eastern Orleans LA-
Northern St. Tammany LA-Southwestern St. Tammany LA-
Southern Hancock MS-
359 AM CDT Sat May 9 2026

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF ORLEANS, SOUTHEASTERN
ST. TAMMANY PARISHES IN SOUTHEASTERN LOUISIANA AND SOUTHERN HANCOCK
COUNTIES THROUGH 430 AM CDT
...

At 359 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from near Pearlington to 6 miles
southeast of Lacombe to 9 miles northwest of New Orleans. Movement
was east at 35 mph.

HAZARD...Winds in excess of 40 mph and pea 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...
New Orleans, Slidell, Bay St. Louis, Waveland, East New Orleans, Lake
Catherine, Pearlington, Shoreline Park, and Lakefront Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 242 and 255, and
between mile markers 259 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 8.
 Interstate 510 between mile markers 1 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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

&&

LAT...LON 3024 8940 3017 8943 3013 8961 3003 8970
      3001 8975 3002 8981 2999 8983 3002 9002
      3006 9008 3007 9001 3017 8989 3014 8982
      3017 8977 3022 8986 3024 8996 3035 8963
      3032 8930
TIME...MOT...LOC 0859Z 280DEG 32KT 3032 8963 3023 8988 3017 9004

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Special Weather Statement
National Weather Service New Orleans LA
436 AM CDT Sat May 9 2026

MSZ068-069-091000-
Wilkinson MS-Amite MS-
436 AM CDT Sat May 9 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
WILKINSON AND SOUTHERN AMITE COUNTIES THROUGH 500 AM CDT
...

At 436 AM CDT, Doppler radar was tracking a strong thunderstorm near
Centreville, or 13 miles north of Clinton, moving east at 30 mph.

HAZARD...Winds in excess of 40 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...
Liberty, Centreville, and Gillsburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 3100 9110 3112 9112 3126 9071 3100 9063
TIME...MOT...LOC 0936Z 254DEG 25KT 3106 9101

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Special Weather Statement
National Weather Service New Orleans LA
440 AM CDT Sat May 9 2026

MSZ068-069-091015-
Wilkinson MS-Amite MS-
440 AM CDT Sat May 9 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN
WILKINSON AND NORTHERN AMITE COUNTIES THROUGH 515 AM CDT
...

At 440 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Dolorosa, or 22 miles southeast of Natchez, moving
east at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Liberty, Gloster, Smithdale, Dolorosa, and Crosby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 3135 9121 3134 9115 3132 9112 3134 9106
      3133 9106 3133 9103 3135 9102 3133 9099
      3135 9098 3135 9062 3110 9062 3118 9139
      3134 9138 3137 9122
TIME...MOT...LOC 0940Z 273DEG 40KT 3126 9124

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

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