Flash Flood Warning 113, NWS New Orleans, LA

986 
WGUS74 KLIX 041641
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
1141 AM CDT Fri Sep 4 2026

MSC109-041845-
/O.CON.KLIX.FF.W.0113.000000T0000Z-260904T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pearl River MS-
1141 AM CDT Fri Sep 4 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM CDT THIS
AFTERNOON FOR CENTRAL PEARL RIVER COUNTY...

At 1141 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2.5 and 5 inches of rain have
fallen. Additional rainfall amounts of 1 to 3 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Poplarville, Mcneil and Crossroads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3063 8954 3073 8983 3075 8982 3075 8983
      3078 8983 3080 8982 3079 8981 3082 8980
      3082 8978 3085 8979 3085 8977 3088 8978
      3088 8977 3090 8977 3089 8934 3065 8934
      3065 8954

FLASH FLOOD...RADAR INDICATED

$$

CAB

943 
WGUS74 KLIX 041742
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
1242 PM CDT Fri Sep 4 2026

MSC109-041845-
/O.CON.KLIX.FF.W.0113.000000T0000Z-260904T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Pearl River MS-
1242 PM CDT Fri Sep 4 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM CDT THIS
AFTERNOON FOR CENTRAL PEARL RIVER COUNTY...

At 1242 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2.5 and 5 inches of rain have
fallen. Additional rainfall amounts up to 1 inch are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Poplarville, Mcneil and Crossroads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.

&&

LAT...LON 3063 8954 3073 8983 3075 8982 3075 8983
      3078 8983 3080 8982 3079 8981 3082 8980
      3082 8978 3085 8979 3085 8977 3088 8978
      3088 8977 3090 8977 3089 8934 3065 8934
      3065 8954

FLASH FLOOD...RADAR INDICATED

$$

TJS

Area Forecast Discussion...UPDATED
National Weather Service New Orleans LA
645 AM CDT Fri Sep 4 2026

...NEW AVIATION...

.KEY MESSAGES...
Updated at 642 AM CDT Fri Sep 4 2026

- Numerous showers and storms are forecast through this weekend.
  While the overall severe weather threat will be low, one or two
  storms could become strong to severe wind gusts, frequent
  lightning and periods of heavy rain.

- Above normal temperatures expected most of the 7-Day forecast
  period. Afternoon heat indices will generally range from 100 to
  107 degrees.

&&

.SHORT TERM...
(Now through Sunday)
Issued at 312 AM CDT Fri Sep 4 2026

A broad upper level high pressure system is currently centered over
the south-central US with upper lows on its northeastern and
northwestern flanks. The ridge will amplify and expand north well
into central Canada today. Closer in to the local area, an easterly
wave in the northern Gulf will be moving continue tracking west.
This feature should provide a favorable environment for convection,
and with increasing low-level convergence and abundant moisture,
promote numerous shower and storm development. Radar imagery early
this morning is already showing increasing shower activity near
coastal areas. Look for this to spread inland through the morning
and afternoon hours. The latest forecast calls a range of 70 to 90
percent, with greatest chances along coastal areas of LA and MS. Did
go above NMB/WPC POPs over coastal LA as well as BTR and NEW metros
as lower guidance values looked unrealistic and not meteorologically
driven. The greater cloud cover and earlier convection across the
region should keep highs mainly in the upper 80s to around 90,
although areas that avoid storms longer could still reach the lower
90s. Model soundings remain fairly saturated throughout the profile,
so widespread damaging winds are not as likely as today. However,
any localized midlevel drying combined with stronger pre-convective
heating could increase DCAPE enough to support an isolated strong to
marginally severe downburst.

Over the weekend, the upper level ridge becomes centered farther
west over the southern Plains while the local area remains along its
southeastern periphery. At the same time, troughing begins to deepen
across the eastern CONUS, with the resulting weakness aloft
continuing to support daily convection. Saturday should remain
fairly active given the lingering deep moisture, with scattered to
numerous mainly afternoon storms developing along mesoscale
boundaries. Highs will generally remain in the lower to middle 90s
with heat indices again around 100 to 107 degrees before convection
provides some relief. As the ridge shifts farther west and flow
aloft becomes somewhat more northerly, forecast profiles may begin
to show slightly more midlevel drying compared to earlier in the
period. If this occurs, increasing DCAPE and a better-defined
inverted-V structure could modestly increase the potential for
isolated strong downbursts, particularly where storms develop after
prolonged heating.

&&

.LONG TERM...
(Monday through Thursday)
Issued at 312 AM CDT Fri Sep 4 2026

On Labor Day, the forecast area will remain positioned between a
broad upper level ridge centered over the southern Rockies and a
longwave trough across the eastern seaboard. This will place the
region beneath a deep mid to upper level north-northeasterly flow
pattern. A dissipating stalled frontal boundary over the area on
Monday will serve as the focus for convective development. PWATS
will be near seasonal averages and moisture will converge along the
front where weak convergence will support updraft development. PoP
will peak around 50 to 60 percent to reflect the convective risk
associated with the stalled front over the area. Temperatures will
also be slightly warmer than average in the low to mid 90s as the
drier air and later convective initiation allows for more daytime
warming to occur. Heat index values will likely exceed advisory
levels for Labor Day. Anyone participating in large outdoor events
and activities should take extra heat precautions.

Tuesday through Thursday will see warming and drying air aloft begin
to feed into the area as a ridge expands eastward. PWATS will fall
below average and any convective development will be more isolated
to widely scattered. Any convective activity should also be more
confined to the seabreeze. The one concern primary concern each day
will be the increased potential for some damaging downburst wind
events to occur with the deepest updrafts that climb above 30k feet.
The drier air in the mid-levels could easily entrain into any deeper
updrafts leading to evaporative cooling and downburst development.
This is supported by steep lapse rates over 8.0C/km below 850mb and
DCAPE of around 1200 J/KG Tuesday afternoon. Beyond the threat for a
few damaging wind events, temperatures will remain very warm with
highs climbing back into the low to mid 90s. However, the drier air
aloft mixing down into the boundary layer should keep heat index
readings just below advisory levels as we move through the week.

&&

.AVIATION...
(12Z TAFS)
Issued at 645 AM CDT Fri Sep 4 2026

Convection is ongoing for NEW and MSY. Soon showers and storms
will start to impact HDC for a an hour or so this morning.
Convection will likely clear in the next hour or two, but more
afternoon convection will be possible leading to MVFR or lower
CIGs/VIS respectively. Winds will generally be light, but will be
gusty and more erratic in and around convection. Tonight any
convection will become more isolated. Need to watch for fog
especially terminals the receive rainfall this afternoon and
evening. (Frye)

&&

.MARINE...
Issued at 312 AM CDT Fri Sep 4 2026

The pressure gradient is expected to be fairly weak the next several
days, lending to quite benign marine conditions over marine areas.
This pattern will maintain winds generally 10 knots or less through
the weekend with seas around 1 to 2 feet. The main potential impacts
comes from daily rounds of isolated to scattered thunderstorms.
Those will have the potential to produce locally higher winds and
waves.

&&

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

SHORT TERM...ME
LONG TERM....ME
AVIATION...RDF
MARINE...ME

Special Weather Statement
National Weather Service New Orleans LA
449 AM CDT Fri Sep 4 2026

LAZ076-079-080-MSZ086-041015-
Southwestern St. Tammany LA-Northern St. Tammany LA-Southeast St.
Tammany LA-Southern Hancock MS-
449 AM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN HANCOCK COUNTY AND
SOUTHEASTERN ST. TAMMANY PARISH UNTIL 515 AM CDT...

At 449 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles east of Slidell, moving west at 30 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

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

The strong thunderstorm will be near...
  Pearlington around 450 AM CDT.
  Slidell and Pearl River around 500 AM CDT.

Other locations impacted by this strong thunderstorm include Slidell
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3025 8993 3041 8989 3031 8960 3019 8962
      3020 8982 3023 8987 3022 8988 3022 8994
TIME...MOT...LOC 0948Z 103DEG 24KT 3026 8970

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

Zeringue

Special Weather Statement
National Weather Service New Orleans LA
520 AM CDT Fri Sep 4 2026

LAZ076-079-080-041100-
Northern St. Tammany LA-Southeast St. Tammany LA-Southwestern St.
Tammany LA-
520 AM CDT Fri Sep 4 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL ST. TAMMANY PARISH
UNTIL 6 AM CDT...

At 520 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles northeast of Lacombe, or 6 miles northwest of Slidell, moving
west at 20 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

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

The strong thunderstorm will be near...
  Slidell around 525 AM CDT.
  Abita Springs around 555 AM CDT.

Other locations impacted by this strong thunderstorm include Slidell
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3034 9009 3049 9003 3036 8979 3023 8985
      3027 9000 3029 9001
TIME...MOT...LOC 1020Z 103DEG 18KT 3035 8986

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

Zeringue