Alert archive / Louisiana / Flash Flood Warnings in 2021

Flash Flood Warning 3, NWS Lake Charles, LA

March 23, 2021Jefferson County, Texas; 9 parishes in Louisiana

NWS Lake Charles, LA issued this flash flood warning at Mar 23, 2021, 7:43 AM CDT for Jefferson County, Texas; 9 parishes in Louisiana. It was in force for 2 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 23, 2021, 7:43 AM CDT (12:43 UTC)
Expired
Mar 23, 2021, 9:45 AM CDT
In force
2 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Jefferson County, TX

The radar

The Lake Charles radar (KLCH), 15 km from the middle of the area, began a volume at 12:45 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.

What was reported inside it

TimeReportWhereRemark
Mar 23, 8:00 AM CDTFLASH FLOODLake Charles, LASEVERAL CARS FLOODED ON KIRKMAN STREET NEAR DOWNTOWN. WATER ALSO REPORTED TO BE BUMPER DEEP TO SUVS ON BROAD STREET NEAR DOWNTOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 0.7 hours before the alert went out and 275 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, Shreveport, LA at 12:00Z on 2021-03-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 203 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2021-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 311 square meters per square second.1939587897Sfc1 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
203 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
311 m²/s²
0-3 km storm-relative helicity
359 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.9

Open this sounding in Storm Lab

The text

As transmitted.

173 
WGUS54 KLCH 231243
FFWLCH
LAC001-003-009-019-023-039-053-079-097-TXC245-231445-
/O.NEW.KLCH.FF.W.0003.210323T1243Z-210323T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
743 AM CDT Tue Mar 23 2021

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  Northwestern Cameron Parish in southwestern Louisiana...
  Southeastern Rapides Parish in central Louisiana...
  Jefferson Davis Parish in southwestern Louisiana...
  Evangeline Parish in central Louisiana...
  Northern Acadia Parish in southwestern Louisiana...
  Calcasieu Parish in southwestern Louisiana...
  Southwestern Avoyelles Parish in central Louisiana...
  St. Landry Parish in central Louisiana...
  Southern Allen Parish in southwestern Louisiana...
  Southeastern Jefferson County in southeastern Texas...

* Until 945 AM CDT.

* At 743 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 2-5 inches of rain have fallen. 
  Flash flooding is already occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Lake Charles, Port Arthur, Sulphur, Opelousas, Eunice, Jennings,
  Ville Platte, Marksville, Westlake, Church Point, Bunkie, Mamou,
  Welsh, Iowa, Kinder, Basile, Oberlin, Iota, Elton and Melville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 2972 9417 2993 9387 2983 9380 2999 9379
      3115 9209 3086 9181 3086 9182 3067 9173
      2989 9323 3005 9333 2985 9335 2987 9335
      2987 9343 2982 9337 2977 9347 2969 9384
      2977 9389 2968 9385 2965 9411

FLASH FLOOD...RADAR INDICATED

$$

Stigger/87

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 23, 2:57 AM CDTSevere Thunderstorm WarningLCHTyler33 min
Mar 23, 3:30 AM CDTSpecial Weather StatementLCHTyler15 min
Mar 23, 5:20 AM CDTSpecial Weather StatementLCHHardin, Jasper, Tyler40 min
Mar 23, 4:32 AM CDTSpecial Weather StatementLCHAcadia, Allen, Calcasieu, Cameron, Evangeline, Jefferson Davis and 1 more43 min
Mar 23, 5:06 AM CDTFlash Flood WarningLCHCalcasieu, Jefferson Davis84 min
Mar 23, 5:08 AM CDTFlash Flood WatchLCHAllen, Cameron, Evangeline, Lafayette, Saint Landry, Saint Martin8 hr
Mar 23, 5:17 AM CDTSpecial Weather StatementLCHAcadia, Allen, Calcasieu, Cameron, Evangeline, Jefferson Davis and 1 more43 min
Mar 23, 5:45 AM CDTFlash Flood WarningLCHAcadia, Allen, Calcasieu, Cameron, Evangeline, Jefferson Davis and 1 more2 hr
Mar 23, 6:01 AM CDTSpecial Weather StatementLCHAcadia, Allen, Calcasieu, Cameron, Evangeline, Jefferson Davis and 1 more44 min
Mar 23, 6:10 AM CDTTornado WarningLCHAcadia, Allen, Evangeline, Jefferson Davis, Saint Landry35 min
Mar 23, 6:36 AM CDTTornado WarningLCHSaint Landry24 min
Mar 23, 6:45 AM CDTSpecial Marine WarningLCH60 min
Mar 23, 6:51 AM CDTSevere Thunderstorm WarningLCHJefferson Davis24 min
Mar 23, 7:08 AM CDTSevere Thunderstorm WarningLCHAvoyelles, Evangeline, Saint Landry37 min
Mar 23, 7:19 AM CDTSevere Thunderstorm WarningLCHCameron26 min
Mar 23, 7:24 AM CDTSevere Thunderstorm WarningLCHAllen, Evangeline21 min
Mar 23, 7:30 AM CDTSpecial Marine WarningLCH30 min
Mar 23, 7:43 AM CDTSevere Thunderstorm WarningLCHCameron62 min
Mar 23, 7:45 AM CDTSevere Thunderstorm WarningLCHAvoyelles, Saint Landry30 min
Mar 23, 8:16 AM CDTTornado WarningLCHSaint Landry29 min
Mar 23, 8:24 AM CDTTornado WarningLCHCameron, Vermilion36 min
Mar 23, 8:45 AM CDTSevere Thunderstorm WarningLCHSaint Landry, Saint Martin45 min
Mar 23, 8:53 AM CDTTornado WarningLCHAcadia, Lafayette, Vermilion37 min
Mar 23, 9:25 AM CDTSevere Thunderstorm WarningLCHIberia, Lafayette, Saint Martin, Vermilion50 min
Mar 23, 9:48 AM CDTAreal Flood WarningLCHAcadia, Allen, Avoyelles, Calcasieu, Cameron, Evangeline and 2 more3 hr
Mar 23, 10:13 AM CDTSevere Thunderstorm WarningLCHIberia, Saint Martin32 min
Mar 23, 10:44 AM CDTSpecial Marine WarningLCH16 min
Mar 23, 11:58 AM CDTRiver Flood WarningLCHCalcasieu21 days
Mar 23, 11:58 AM CDTRiver Flood WarningLCHAcadia, Evangeline, Saint Landry4 days
Mar 23, 11:58 AM CDTRiver Flood WarningLCHCalcasieu5 days
Mar 23, 12:08 PM CDTSpecial Marine WarningLCH52 min
Mar 23, 3:19 PM CDTFlash Flood WarningLCHIberia, St. Mary116 min
Mar 23, 3:43 PM CDTSmall Craft AdvisoryLCH12 hr
Mar 23, 6:00 PM CDTSpecial Marine WarningLCH90 min

Nearby

Flash Flood Warnings in Louisiana, 2021Flash Flood Warnings in Texas, 2021Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.