Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 9, NWS Lake Charles, LA
NWS Lake Charles, LA issued this flash flood warning at May 11, 2021, 9:36 PM CDT for 7 parishes in Louisiana. It was in force for 4 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
- May 11, 2021, 9:36 PM CDT (02:36 UTC)
- Expired
- May 12, 2021, 1:30 AM CDT
- In force
- 4 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, Vermilion Parish, LA
The radar
The Lake Charles radar (KLCH), 80 km from the middle of the area, began a volume at 02:36 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
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 12:30 AM CDT | FLASH FLOOD | Youngsville, LA | VIDEO FROM SOCIAL MEDIA SHOWS WATER OVER ROADWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.6 hours before the alert went out and 79 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.
- 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
The text
As transmitted.
882
WGUS54 KLCH 120236
FFWLCH
LAC001-045-053-055-097-099-113-120630-
/O.NEW.KLCH.FF.W.0009.210512T0236Z-210512T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
936 PM CDT Tue May 11 2021
The National Weather Service in Lake Charles has issued a
* Flash Flood Warning for...
South Central St. Landry Parish in central Louisiana...
Northwestern Iberia Parish in south central Louisiana...
Lafayette Parish in south central Louisiana...
West Central St. Martin Parish in south central Louisiana...
Acadia Parish in southwestern Louisiana...
Eastern Jefferson Davis Parish in southwestern Louisiana...
Northeastern Vermilion Parish in southwestern Louisiana...
* Until 130 AM CDT.
* At 936 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 5 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
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 flash flooding include...
Lafayette, New Iberia, Crowley, Abbeville, Eunice, Jennings,
Scott, Breaux Bridge, Rayne, Carencro, St. Martinville, Kaplan,
Church Point, Welsh, Basile, Iota, Elton, Mermentau, Evangeline
and Broussard.
Additional rainfall amounts of 2 to 4 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3019 9293 3049 9273 3048 9249 3037 9196
3011 9176 2993 9197
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-4 INCHES IN 4 HOURS
$$
24The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:23 PM CDT | Severe Thunderstorm Warning | LCH | Calcasieu | 37 min |
| May 11, 7:28 PM CDT | Severe Thunderstorm Warning | LCH | Iberia, Saint Martin, St. Mary | 31 min |
| May 11, 7:46 PM CDT | Special Weather Statement | LCH | Acadia | 44 min |
| May 11, 7:56 PM CDT | Special Weather Statement | LCH | Jefferson Davis | 34 min |
| May 11, 7:58 PM CDT | Special Weather Statement | LCH | Calcasieu | 47 min |
| May 11, 8:06 PM CDT | Special Weather Statement | LCH | Beauregard | 39 min |
| May 11, 8:16 PM CDT | Special Weather Statement | LCH | Calcasieu | 29 min |
| May 11, 8:31 PM CDT | Special Weather Statement | LCH | Allen, Rapides | 44 min |
| May 11, 8:32 PM CDT | Special Marine Warning | LCH | 28 min | |
| May 11, 8:45 PM CDT | Special Weather Statement | LCH | Cameron | 45 min |
| May 11, 8:58 PM CDT | Special Marine Warning | LCH | 47 min | |
| May 11, 9:18 PM CDT | Special Weather Statement | LCH | Evangeline, Jefferson Davis | 42 min |
| May 11, 9:32 PM CDT | Flash Flood Warning | LCH | Calcasieu | 3 hr |
| May 11, 9:39 PM CDT | Special Weather Statement | LCH | Cameron | 51 min |
| May 11, 10:19 PM CDT | Special Weather Statement | LCH | Lafayette, Vermilion | 41 min |
| May 11, 10:59 PM CDT | Special Marine Warning | LCH | 61 min | |
| May 11, 11:13 PM CDT | Special Weather Statement | LCH | Saint Martin | 47 min |
| May 11, 11:49 PM CDT | Severe Thunderstorm Warning | LCH | Saint Martin, St. Mary | 41 min |
| May 12, 1:38 AM CDT | Areal Flood Warning | LCH | Acadia, Iberia, Jefferson Davis, Lafayette, Saint Landry, Saint Martin and 2 more | 3 hr |
| May 12, 11:16 AM CDT | River Flood Warning | LCH | Acadia, Allen, Evangeline, Jefferson Davis | 4 days |
| May 12, 3:22 PM CDT | River Flood Warning | LCH | Acadia, Evangeline, Saint Landry | 56 hr |
| May 12, 3:22 PM CDT | River Flood Warning | LCH | Acadia, Jefferson Davis, Vermilion | 31 days |
Nearby
Flash Flood Warnings in Louisiana, 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.