Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 47, NWS Lake Charles, LA
NWS Lake Charles, LA issued this flash flood warning at Aug 31, 2021, 5:00 PM CDT for Lafayette Parish, 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 outline as issued.
The facts
- Issued
- Aug 31, 2021, 5:00 PM CDT (22:00 UTC)
- Expired
- Aug 31, 2021, 8:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Lake Charles, LA
- Area
- Storm-based polygon
- Flood severity
- None
County Lafayette Parish, LA
The radar
The Lake Charles radar (KLCH), 116 km from the middle of the area, began a volume at 21:59 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 12:00Z, 10.0 hours before the alert went out and 114 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
- 2197 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 791 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
986
WGUS54 KLCH 312200
FFWLCH
LAC055-010100-
/O.NEW.KLCH.FF.W.0047.210831T2200Z-210901T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
500 PM CDT Tue Aug 31 2021
The National Weather Service in Lake Charles has issued a
* Flash Flood Warning for...
Central Lafayette Parish in south central Louisiana...
* Until 800 PM CDT.
* At 500 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. The expected rainfall rate is 1.5 to 3 inches in 1
hour. 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.
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...
Lafayette, Scott and Broussard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3018 9195 3017 9194 3013 9194 3014 9204
3019 9211 3023 9215 3027 9210 3026 9205
3024 9202 3021 9198 3018 9198 3018 9196
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1.5-3 INCHES IN 1 HOUR
$$
Landreneau1 follow-up statement
179
WGUS74 KLCH 010026
FFSLCH
Flash Flood Statement
National Weather Service Lake Charles LA
726 PM CDT Tue Aug 31 2021
LAC055-010100-
/O.CON.KLCH.FF.W.0047.000000T0000Z-210901T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lafayette LA-
726 PM CDT Tue Aug 31 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING
FOR CENTRAL LAFAYETTE PARISH...
At 726 PM CDT, Doppler radar indicated thunderstorms has ended
across Lafayette parish, but urban run-off rain water continues to
slowly drain across the warned area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Lafayette, Scott and Broussard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3018 9195 3017 9194 3013 9194 3014 9204
3019 9211 3023 9215 3027 9210 3026 9205
3024 9202 3021 9198 3018 9198 3018 9196
FLASH FLOOD...RADAR INDICATED
$$
LandreneauThe office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 3:53 PM CDT | Special Weather Statement | LCH | Jefferson Davis | 22 min |
| Aug 31, 4:34 PM CDT | Special Weather Statement | LCH | Acadia, Jefferson Davis, Lafayette, Saint Martin | 56 min |
| Aug 31, 5:27 PM CDT | Special Weather Statement | LCH | Calcasieu | 48 min |
| Aug 31, 5:48 PM CDT | Flash Flood Warning | LCH | Calcasieu | 2 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.