Alert archive / Louisiana / Areal Flood Warnings in 2021

Areal Flood Warning 6, NWS Lake Charles, LA

May 12, 20218 parishes in Louisiana

NWS Lake Charles, LA issued this areal flood warning at May 12, 2021, 1:38 AM CDT for 8 parishes in Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 12, 2021, 1:38 AM CDT (06:38 UTC)
Expired
May 12, 2021, 4:30 AM CDT
In force
3 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Acadia Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 111 km from the middle of the area, began a volume at 06:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.6 hours before the alert went out and 109 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2021-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2262 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2021-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2262 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
1.8
Supercell composite
12.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this areal flood warning went out at May 12, 12:00 AM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, May 12, 12:00 AM CDT, 1 hour 38 minutes before
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Hazardous weather outlook, May 11, 3:39 PM CDT, 9 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Lake Charles LA
339 PM CDT Tue May 11 2021

LAZ041-042-073-074-TXZ201-215-216-261-262-122045-
Calcasieu-Jefferson Davis-West Cameron-East Cameron-Hardin-Jefferson-
Orange-Southern Jasper-Southern Newton-
339 PM CDT Tue May 11 2021

This Hazardous Weather Outlook is for southwest Louisiana and
southeast Texas.

.DAY ONE...This afternoon and tonight.

There is a marginal risk for severe thunderstorms for the Day One
period which all modes are possible and defined as large
hail...damaging winds and perhaps a tornado. Otherwise...showers and
thunderstorms will develop along and near the front today and will
move south overnight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The probability for widespread hazardous weather is low. Showers and
thunderstorms are expected to end during the morning on Wednesday as
the cool front moves further into the gulf. Cool dry air will build
in for the rest of Wednesday into Friday. A warmup returns over the
weekend with rain chances returning Sunday and Monday ahead of the
next weather system.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

LAZ027>033-043>045-052>055-TXZ180-259-260-122045-
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Acadia-Lafayette-Upper St. Martin-Vermilion-Iberia-St. Mary-
Lower St. Martin-Tyler-Northern Jasper-Northern Newton-
339 PM CDT Tue May 11 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY AFTERNOON...

This Hazardous Weather Outlook is for central Louisiana, south
central Louisiana, southwest Louisiana, west central Louisiana and
southeast Texas.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

A stationary front will lift northward this afternoon into interior
southeast Texas and central Louisiana. This boundary will be the
focus for marginal strong to severe thunderstorms with damaging
wind...large hail or a tornado perhaps. Otherwise...A Flash Flood
Watch has been issued for the possibility of flooding rains that
could develop this afternoon into Wednesday morning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

The probability for widespread hazardous weather is low. Showers and
thunderstorms are expected to end during the morning on Wednesday as
the cool front moves further into the gulf. Cool dry air will build
in for the rest of Wednesday into Friday. A warmup returns over the
weekend with rain chances returning Sunday and Monday ahead of the
next weather system.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

GMZ430-432-435-450-452-455-470-472-475-122045-
Sabine Lake-Calcasieu Lake-Vermilion Bay-
Coastal waters from Cameron LA to High Island TX out 20 NM-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
Coastal waters from Lower Atchafalaya River to Intracoastal City LA
out 20 NM-Waters from Cameron LA to High Island TX from 20 to 60 NM-
Waters from Intracoastal City to Cameron LA from 20 to 60 NM-
Waters from Lower Atchafalaya River to Intracoastal City LA from
20 to 60 NM-
339 PM CDT Tue May 11 2021

This Hazardous Weather Outlook is for the Gulf of Mexico and the
coastal lakes and bays of the Gulf of Mexico.

.DAY ONE...This afternoon and tonight.

Showers and Thunderstorms will be on the increase later today into
tonight. The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

The probability for widespread hazardous weather is low. Showers and
thunderstorms are expected to end Wednesday night into early
Thursday morning as the cool front moves further offshore. Cool dry
air will build in for the rest of the week. A warmup returns over
the weekend with rain chances returning Sunday and Monday ahead of
the next weather system.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, May 11, 10:19 PM CDT, 3 hours 19 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
1019 PM CDT Tue May 11 2021

LAZ043>045-052-053-074-120400-
Acadia LA-Iberia LA-Lafayette LA-Vermilion LA-Upper St. Martin LA-
East Cameron LA-
1019 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN IBERIA...
SOUTHEASTERN CAMERON...SOUTHERN LAFAYETTE...SOUTHEASTERN ACADIA...
VERMILION AND WEST CENTRAL ST. MARTIN PARISHES UNTIL 1100 PM CDT...

At 1019 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Indian Bayou to 7 miles south of Wright to
6 miles west of Rockefeller Wildlife Range. Movement was east at 25
mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Lafayette, New Iberia, Crowley, Abbeville, Scott, St. Martinville,
Kaplan, Rockefeller Wildlife Range, Forked Island, Intracoastal City,
Pecan Island, Avery Island, Broussard, Youngsville, Erath, Delcambre,
Maurice, Wright, Acadiana Regional Airport and Jefferson Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 2960 9269 2970 9294 2991 9253 3022 9236
      3021 9165 2985 9189 2984 9193 2984 9189
      2983 9191 2981 9194 2983 9197 2979 9198
      2972 9215 2973 9215 2976 9213 2974 9217
      2975 9221 2970 9216 2956 9244
TIME...MOT...LOC 0319Z 277DEG 23KT 3015 9229 2991 9245 2969 9287

24
Local storm report, May 11, 10:35 PM CDT, 3 hours 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1035 PM CDT TUE MAY 11 2021

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

0615 PM     HAIL             5 S WARREN              30.54N 94.41W
05/11/2021  E1.00 INCH       TYLER              TX   BROADCAST MEDIA

            QUARTER SIZE HAIL REPORTED 5 MILES SOUTH OF WARREN, TX.

&&

ADONATO
Local storm report, May 11, 10:54 PM CDT, 2 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1054 PM CDT TUE MAY 11 2021

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

0641 PM     HAIL             3 NNE FRANKLIN          29.84N 91.50W
05/11/2021  E0.50 INCH       ST. MARY           LA   PUBLIC

            PEA TO MARBLE SIZE HAIL REPORTED AT IRISH BEND PLANTING 3
            MILES NNE OF FRANKLIN, LA.

&&

ADONATO
Special weather statement, May 11, 11:13 PM CDT, 2 hours 25 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
1113 PM CDT Tue May 11 2021

LAZ045-053>055-120500-
Lower St. Martin LA-Iberia LA-Upper St. Martin LA-St. Mary LA-
1113 PM CDT Tue May 11 2021

...SIGNIFICANT WEATHER ADVISORY FOR IBERIA...NORTHWESTERN ST. MARY
AND CENTRAL ST. MARTIN PARISHES UNTIL MIDNIGHT CDT...

At 1112 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Loreauville to near Avery Island to near
Intracoastal City. Movement was east at 40 mph.

Pea size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
New Iberia, Franklin, St. Martinville, Jeanerette, Cypremort Point,
Belle River, Baldwin, Loreauville, Glencoe, Lydia, Sorrel, Cote
Blanche Island, Lake Fausse Pointe, Charenton, Pierre Part, Weeks
Island and Centerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 2981 9116 2968 9150 2969 9163 2976 9162
      2971 9188 2974 9186 2975 9188 2980 9185
      2978 9183 2982 9182 2981 9194 2984 9197
      2987 9192 3020 9179 3020 9149 3010 9146
      3004 9123 2998 9126
TIME...MOT...LOC 0412Z 275DEG 37KT 3013 9175 2987 9185 2975 9207

Rua
Local storm report, May 11, 11:40 PM CDT, 1 hour 58 minutes before
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Local storm report, May 11, 11:43 PM CDT, 1 hour 55 minutes before
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The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 7:23 PM CDTSevere Thunderstorm WarningLCHCalcasieu37 min
May 11, 7:28 PM CDTSevere Thunderstorm WarningLCHIberia, Saint Martin, St. Mary31 min
May 11, 7:46 PM CDTSpecial Weather StatementLCHAcadia44 min
May 11, 7:56 PM CDTSpecial Weather StatementLCHJefferson Davis34 min
May 11, 7:58 PM CDTSpecial Weather StatementLCHCalcasieu47 min
May 11, 8:06 PM CDTSpecial Weather StatementLCHBeauregard39 min
May 11, 8:16 PM CDTSpecial Weather StatementLCHCalcasieu29 min
May 11, 8:31 PM CDTSpecial Weather StatementLCHAllen, Rapides44 min
May 11, 8:32 PM CDTSpecial Marine WarningLCH28 min
May 11, 8:45 PM CDTSpecial Weather StatementLCHCameron45 min
May 11, 8:58 PM CDTSpecial Marine WarningLCH47 min
May 11, 9:18 PM CDTSpecial Weather StatementLCHEvangeline, Jefferson Davis42 min
May 11, 9:32 PM CDTFlash Flood WarningLCHCalcasieu3 hr
May 11, 9:36 PM CDTFlash Flood WarningLCHAcadia, Iberia, Jefferson Davis, Lafayette, Saint Landry, Saint Martin and 1 more4 hr
May 11, 9:39 PM CDTSpecial Weather StatementLCHCameron51 min
May 11, 10:19 PM CDTSpecial Weather StatementLCHLafayette, Vermilion41 min
May 11, 10:59 PM CDTSpecial Marine WarningLCH61 min
May 11, 11:13 PM CDTSpecial Weather StatementLCHSaint Martin47 min
May 11, 11:49 PM CDTSevere Thunderstorm WarningLCHSaint Martin, St. Mary41 min
May 12, 11:16 AM CDTRiver Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis4 days
May 12, 3:22 PM CDTRiver Flood WarningLCHAcadia, Evangeline, Saint Landry56 hr
May 12, 3:22 PM CDTRiver Flood WarningLCHAcadia, Jefferson Davis, Vermilion31 days
May 11, 7:07 PM CDTSevere Thunderstorm WarningLCHJasper, Tyler27 min
May 11, 7:36 PM CDTSpecial Weather StatementLCHOrange39 min
May 11, 7:50 PM CDTSpecial Weather StatementLCHHardin40 min
May 12, 3:22 PM CDTRiver Flood WarningLCHHardin, Jasper, Orange, Tyler45 days

Nearby

Areal Flood Warnings in Louisiana, 2021Every areal flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.