Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Feb 11, 2021, 6:41 AM CST for East Baton Rouge Parish, East Feliciana Parish, Saint Helena Parish, Louisiana. It was in force for 3 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
- Feb 11, 2021, 6:41 AM CST (12:41 UTC)
- Expired
- Feb 11, 2021, 9:45 AM CST
- In force
- 3 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Saint Helena Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 11, 8:00 AM CST | FLASH FLOOD | Clinton, LA | REPORTS OF FLOODED ROADS ACROSS PORTIONS OF EAST FELICIANA PARISH. REPORT OF 6.47 INCHES OF RAIN IN CLINTON BETWEEN MIDNIGHT AND 8AM. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 0.7 hours before the alert went out and 145 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
- 1397 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 571 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.5
The text
As transmitted.
408
WGUS54 KLIX 111241
FFWLIX
LAC033-037-091-111545-
/O.NEW.KLIX.FF.W.0001.210211T1241Z-210211T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
641 AM CST Thu Feb 11 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northwestern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Northwestern St. Helena Parish in southeastern Louisiana...
* Until 945 AM CST.
* At 641 AM CST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 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...
Zachary, Jackson, Clinton, Slaughter, Wilson, Felps and Darlington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3065 9130 3069 9132 3085 9121 3096 9102
3099 9092 3100 9068 3087 9077 3066 9104
3060 9125
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
909
WGUS74 KLIX 111308
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
708 AM CST Thu Feb 11 2021
LAC033-037-091-111545-
/O.CON.KLIX.FF.W.0001.000000T0000Z-210211T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
East Baton Rouge LA-East Feliciana LA-St. Helena LA-
708 AM CST Thu Feb 11 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CST THIS
MORNING FOR NORTHWESTERN EAST BATON ROUGE, EAST FELICIANA AND
NORTHWESTERN ST. HELENA PARISHES...
At 708 AM CST, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 3 and 5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Doppler radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Zachary, Jackson, Clinton, Slaughter, Wilson, Felps and Darlington.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3065 9130 3069 9132 3085 9121 3096 9102
3099 9092 3100 9068 3087 9077 3066 9104
3060 9125
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 2:58 AM CST | Special Weather Statement | LIX | West Baton Rouge | 47 min |
| Feb 11, 3:45 AM CST | Special Weather Statement | LIX | West Feliciana | 45 min |
| Feb 11, 4:05 AM CST | Special Weather Statement | LIX | West Feliciana | 40 min |
| Feb 11, 5:11 AM CST | Special Weather Statement | LIX | East Feliciana | 34 min |
| Feb 11, 5:46 AM CST | Special Weather Statement | LIX | East Feliciana, Saint Helena | 29 min |
| Feb 11, 7:22 AM CST | Special Weather Statement | LIX | Saint Helena | 53 min |
| Feb 11, 8:51 AM CST | Special Weather Statement | LIX | Washington | 54 min |
| Feb 11, 9:10 AM CST | Tornado Warning | LIX | Washington | 28 min |
| Feb 11, 9:35 AM CST | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee and 4 more | 3 hr |
| Feb 11, 10:20 AM CST | Special Weather Statement | LIX | Livingston, Saint James, Saint John the Baptist | 55 min |
| Feb 11, 10:27 AM CST | Areal Flood Advisory | LIX | Ascension, Livingston, Saint Helena, Saint James, Saint John the Baptist, Saint Tammany and 2 more | 3 hr |
| Feb 11, 11:06 AM CST | Areal Flood Advisory | LIX | Saint Tammany, Tangipahoa, Washington | 2 hr |
| Feb 11, 11:15 AM CST | Special Weather Statement | LIX | Saint Tammany | 60 min |
| Feb 11, 11:26 AM CST | River Flood Warning | LIX | Saint Tammany | 19 days |
| Feb 11, 11:26 AM CST | River Flood Warning | LIX | Saint Tammany, Washington | 4 days |
| Feb 11, 11:26 AM CST | River Flood Warning | LIX | Saint Tammany | 5 days |
| Feb 11, 11:35 AM CST | Areal Flood Advisory | LIX | Assumption, Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist and 1 more | 3 hr |
| Feb 11, 12:04 PM CST | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles | 3 hr |
| Feb 11, 2:00 PM CST | River Flood Warning | LIX | East Baton Rouge | 52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.