Flash Flood Warning 28, NWS New Orleans, LA

834 
WGUS74 KLIX 240932
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
432 AM CDT Tue May 24 2022

LAC103-MSC045-241145-
/O.CON.KLIX.FF.W.0028.000000T0000Z-220524T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Tammany LA-Hancock MS-
432 AM CDT Tue May 24 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM CDT THIS 
MORNING FOR SOUTHERN HANCOCK COUNTY AND SOUTHERN ST. TAMMANY 
PARISH...

At 432 AM CDT, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain across the warned area. Between 
1.5 and 5 inches of rain have fallen in portions of the warned area. 
Radar imagery indicates more areas of training heavy rain possible 
leading to additional rainfall amounts of 1 to 2 inches are possible 
in the warned area. Flash flooding is ongoing or expected to begin 
shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

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...
  New Orleans, Slidell, Bay St. Louis, Waveland, Diamondhead, Pearl 
  River, Stennis Space Center, Pearlington, Lacombe, Kiln, Shoreline 
  Park and Slidell Airport.

This includes the following Interstates...
	Interstate 10 in Louisiana between mile markers 261 and 273.
	Interstate 12 between mile markers 63 and 84.
	Interstate 10 in Mississippi between mile markers 1 and 18.
	Interstate 59 in Louisiana between mile markers 1 and 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3037 9013 3043 9011 3046 8938 3042 8934
      3037 8934 3034 8938 3034 8934 3031 8932
      3025 8942 3022 8943 3018 8956 3015 8959
      3016 8962 3017 8958 3018 8958 3016 8963
      3018 8975 3025 8987 3026 8998 3031 9000

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

KLG

455 
WGUS74 KLIX 241102
FFSLIX

Flash Flood Statement
National Weather Service New Orleans LA
602 AM CDT Tue May 24 2022

LAC103-MSC045-241112-
/O.CAN.KLIX.FF.W.0028.000000T0000Z-220524T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Tammany LA-Hancock MS-
602 AM CDT Tue May 24 2022

...FLASH FLOOD WARNING FOR SOUTHERN HANCOCK COUNTY AND SOUTHERN ST. 
TAMMANY PARISH HAS BEEN REPLACED WITH A FLOOD ADVISORY...

LAT...LON 3037 9013 3043 9011 3046 8938 3042 8934
      3037 8934 3034 8938 3034 8934 3031 8932
      3025 8942 3022 8943 3018 8956 3015 8959
      3016 8962 3017 8958 3018 8958 3016 8963
      3018 8975 3025 8987 3026 8998 3031 9000

$$

KLG

Area Forecast Discussion
National Weather Service New Orleans LA
1152 PM CDT Mon May 23 2022

.AVIATION...
Still a few thunderstorms and scattered showers across the area
and would expect continued isolated shower development tonight and
through the TAF period. Have VCSH for most of the TAFs with a few
PROB30 groups for afternoon thunderstorms. Timing could be off a
few hours as thunder is possible at almost any time but we tried
to pick the best time with the PROB30. MVFR CIGS/VIS possible with
heavier showers and briefly this morning at MCB.

&&

.PREV DISCUSSION... /issued 757 PM CDT Mon May 23 2022/

AVIATION...through 00z Wednesday

Most of the thunderstorms are out of the area with only HDC having
rain at the moment. Did add VCSH for most areas overnight and into
tomorrow. Coverage is too uncertain to add thunder or get more
specific with timing. MVFR CIGS/VIS may be possible tonight,
mostly around MCB although a few other brief instances of MVFR
can't be ruled out in the terminals north of I-10.

PREV DISCUSSION... /issued 356 PM CDT Mon May 23 2022/

SHORT TERM (Tonight through Wednesday Night)...

A stalled frontal boundary oriented SW-NW from near the mouth of
the Atchafalaya River and over towards Pearl River County is
beginning to lift to the northwest with showers and isolated
thunderstorms moving with it. Convection remains scattered with
the bulk of ongoing storms south and west of Baton Rouge with a
smattering of cells over the Pearl River basins.

Meanwhile, a meso low over the Gulf visible on the current radar,
will continue to lift north across coastal SELA bringing scattered
convection through the evening hours. Surface convergence and
plenty of available moisture will allow pockets of showers and
thunderstorms to continue through the overnight hours.

Unsettled weather will continue into Tuesday as a surface low
moves across NE Texas and into Western LA and the coastal waters.
Models indicate the formation of an MCS, and depending on were the
front boundary lingers tonight, we could see the two weather
features interact. This would keep scattered to numerous
showers/storms in the forecast trough the day Tuesday mainly
across the northern half of our CWA. This system will exit Tuesday
night and we may have a short reprieve before the next system.

This next main weather maker will be in the form of a strong low
pressure system developing across the Central Plains late Tuesday
into Wednesday. Where it gets complex is that a yet another
overnight complex could move out of Texas and into Louisiana with
widespread storms. Furthermore, a cold front will follow with or
just behind this complex of storms Wednesday night into Thursday.
We could see several rounds of precipitation with this systems.
Exact timing and location of this areas of storms will need to be
refined in future forecasts.

It should also be noted that with the longer SE fetch over the
Gulf with high pressure to the east of Fl and the strong low over
TX, portions of Coastal MS could see minor coastal flooding
Tuesday and Wednesday. The good news we are entering a neap tidal
cycle and higher high tides should not be a factor.

LONG TERM (Thursday through Sunday)...

Long term models remain in fairly good agreement a stronger cold
front mentioned above should be sweeping through the our area
sometime Thursday morning supported by an H5 trough digging its way
across the OK/AR. However, the GFS has slowed ever so slightly with
the latest run as well as deepened this low pressure system as it
moves eastward into the Arkansas River Valley. Several shortwaves
will move through the base of the trough and eject east across
Northern LA as the front moves west to east.

Showers and thunderstorms will are expected to develop along and
ahead of the front by the time it moves into the our area by
daybreak on Thursday. The front and, likely QLCS, should race
eastward Thursday morning into the afternoon hours. There are
indications that some of these storms could be strong or severe
even given the strength of the low. Although the timing is not the
most conduce for daytime heating and instability, the wind and
shear profiles support development of stronger storms capable of
rotation This could mean the potential for hail development, or if
storms are surfaced-based, a winds and maybe even a chance at a
tornado. Locally heavy rain would also accompany any storms but
given the current projected movement through the area, any flash
flooding would not be widespread.

Overall, this system is still 3 days out and the forecast could
and likely will change in terms of strength and timing. The good
news is that behind the front, surface high pressure will build in
across the Northern Gulf Coast for the remainder of the week and
into the Memorial Day Weekend. Aloft, we will remain in
northwesterly flow which should allow for drier weather and lower
humidity. However, high temperatures will be warm in the mid/upper
80s to lower 90s.

MARINE...

Showers and thunderstorms will stay in the forecast through at
least late Wednesday or early Thursday. A long S to SE fetch will
develop as high pressure sits off the east coast of FL and low
pressure forms over Central TX on Tuesday. Moderate seas of 3 to 5
feet will be common in the outer waters...with seas possibly
getting higher. A stronger cold front will moves through the
coastal waters late Wednesday night into Thursday with widespread
storms. High pressure will return with improved marine conditions
for the holiday weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  67  87  71  83 /  20  60  20  90
BTR  68  88  72  85 /  20  60  30  90
ASD  69  89  72  86 /  40  50  30  90
MSY  73  88  76  87 /  30  40  30  90
GPT  71  86  75  84 /  40  50  30  90
PQL  70  86  73  85 /  40  60  30  90

&&

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
749 PM CDT MON MAY 23 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     NON-TSTM WND DMG 3 N KENNER              30.02N 90.26W
05/23/2022                   JEFFERSON          LA   BROADCAST MEDIA

            PICTURES WERE RECEIVED SHOWING MINOR ROOF
            AND PORCH DAMAGE TO TWO HOMES IN KENNER. THE
            PICTURES ALSO SHOW THINGS SUCH AS A GARBAGE
            CAN, A CARD TABLE AND A LIGHTWEIGHT CRATE
            THAT WERE NOT MOVED. THE LEAVES ON THE TREES
            ALSO APPEARED TO BE UNTOUCHED. BOTH KLIX AND
            TMSY RADARS DO NOT INDICATE ANY SIGNATURES
            IN THAT AREA CAPABLE OF WINDS GREATER THAN
            58 MPH OR EVEN A BRIEF TORNADO. WHILE THIS
            IS STILL POSSIBLE, IT IS BEYOND OUR SCIENCE
            TO CONFIDENTLY CALL THIS A TORNADO THAT HAD
            GREATER THAN 65 MPH WINDS (65 MPH IS THE
            MINIMUM SPEED TO DETERMINE SOMETHING IS A
            TORNADO). ITS COMPLETELY POSSIBLE THAT
            OUTFLOW FROM THE STORM THAT WAS TO THE
            NORTHWEST CREATED A BRIEF GUSTNADO OR
            LANDSPOUT THAT HAD WINDS LESS THAN 65 MPH.
            WE DO RECOGNIZE THAT THERE WERE VIDEOS OF A
            FUNNEL CLOUD IN THE AREA. GUST FRONTS,
            ESPECIALLY IN TROPICAL ENVIRONMENTS, CAN
            STILL PRODUCE THESE. IF A FUNNEL TOUCHES
            DOWN ALONG A GUST FRONT AND IF THE DAMAGE IS
            LESS THAN 65 MPH, IT WILL STILL BE
            CONSIDERED A GUSTNADO. LOOKING AT THE TWO
            PICTURES, THE PATIO THAT WAS DAMAGED WAS
            FACING NORTH, LEADING TO DAMAGE FROM A WIND
            COMING FROM THE NORTH. THE ROOF THAT WAS
            DAMAGED WAS ACROSS THE STREET, WHICH WOULD
            MEAN THE NORTH-NORTHWEST WIND WOULD HIT IT
            DIRECTLY ON THE ROOF AS A STRAIGHT LINE WIND
            GUST. THERE WERE ALSO REPORTS OF BURSTS OF
            WIND WHICH IS INDICATIVE OF A DOWNBURST OR
            OUTFLOW WINDS FROM A THUNDERSTORM. WE ARE
            STILL WAITING FOR ADDITIONAL PICTURES AND
            REPORTS AND WE WILL UPDATE THIS AS NEEDED.
            IN SUMMARY, THE PICTURES AND RADAR IMAGES
            INDICATE THIS COULD HAVE BEEN DAMAGING
            STRAIGHT WINDS WITH THE OUTFLOW OF A
            THUNDERSTORM OR A BRIEF GUSTNADO ALONG THAT
            OUTFLOW.

&&

LNN

Special Weather Statement
National Weather Service New Orleans LA
824 PM CDT Mon May 23 2022

MSZ080-081-240200-
Harrison MS-Hancock MS-
824 PM CDT Mon May 23 2022

...A strong thunderstorm will impact portions of southern Harrison
and southeastern Hancock Counties through 900 PM CDT...

At 824 PM CDT, Doppler radar was tracking a strong thunderstorm near
Long Beach, moving north at 20 mph.

HAZARD...Winds in excess of 30 mph.

SOURCE...Radar indicated.

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

Locations impacted include...
Gulfport, Biloxi, Long Beach, Bay St. Louis, Diamondhead and Gulfport
Airport.

This includes Interstate 10 in Mississippi between mile markers 16
and 41.

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.

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 3043 8898 3042 8901 3041 8899 3039 8899
      3037 8908 3030 8927 3031 8929 3035 8928
      3036 8928 3038 8932 3036 8936 3033 8934
      3039 8940 3049 8896
TIME...MOT...LOC 0124Z 163DEG 19KT 3031 8913

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

CAB

Special Weather Statement
National Weather Service New Orleans LA
112 AM CDT Tue May 24 2022

LAZ076-079-080-240715-
Southeast St. Tammany LA-Northern St. Tammany LA-
Southwestern St. Tammany LA-
112 AM CDT Tue May 24 2022

...A strong thunderstorm will impact portions of southwestern St.
Tammany Parish through 215 AM CDT...

At 111 AM CDT, Doppler radar was tracking a strong thunderstorm
capable of producing a waterspout over Lake Pontchartrain 7 miles
southeast of Madisonville, or 10 miles south of Covington, moving
northeast at 15 mph.

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.

Locations impacted include...
Slidell, Abita Springs, Lacombe and Slidell Airport.

This includes Interstate 12 between mile markers 63 and 82.

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.

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 3035 8977 3022 8984 3025 8987 3026 8990
      3025 8993 3026 8995 3026 8998 3029 8998
      3032 9001 3032 9003 3036 9007 3037 9013
      3050 9007
TIME...MOT...LOC 0611Z 246DEG 14KT 3033 9007

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

CAB