Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 44, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at May 20, 2021, 9:45 AM CDT for 4 parishes in Louisiana; Amite County, Wilkinson County, Mississippi. It was in force for 11 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
- May 20, 2021, 9:45 AM CDT (14:45 UTC)
- Expired
- May 20, 2021, 8:45 PM CDT
- In force
- 11 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, West Feliciana Parish, LA, Amite County, MS, Wilkinson County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 2.8 hours before the alert went out and 154 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
- 622 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
131
WGUS54 KLIX 201445
FFWLIX
LAC033-037-091-125-MSC005-157-201745-
/O.NEW.KLIX.FF.W.0044.210520T1445Z-210520T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
945 AM CDT Thu May 20 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northeastern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Western St. Helena Parish in southeastern Louisiana...
Eastern West Feliciana Parish in southeastern Louisiana...
Southwestern Amite County in southern Mississippi...
Southeastern Wilkinson County in southern Mississippi...
* Until 1245 PM CDT.
* At 945 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 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, Centreville, Woodville, Slaughter,
Wilson, Norwood, Spillman and Pride.
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.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3101 9137 3115 9129 3115 9106 3115 9099
3071 9084 3065 9091 3068 9092 3068 9128
FLASH FLOOD...RADAR INDICATED
$$
CAB4 follow-up statements
126
WGUS54 KLIX 201732
FFWLIX
LAC033-037-091-125-MSC005-157-201945-
/O.EXT.KLIX.FF.W.0044.000000T0000Z-210520T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1232 PM CDT Thu May 20 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Northeastern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Western St. Helena Parish in southeastern Louisiana...
Eastern West Feliciana Parish in southeastern Louisiana...
Southwestern Amite County in southern Mississippi...
Southeastern Wilkinson County in southern Mississippi...
* Until 245 PM CDT.
* At 1232 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 4 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Zachary, Jackson, Clinton, Centreville, Woodville, Slaughter,
Wilson, Norwood, Spillman and Pride.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3101 9137 3115 9129 3115 9106 3115 9099
3071 9084 3065 9091 3068 9092 3068 9128
FLASH FLOOD...RADAR INDICATED
$$
CAB403
WGUS54 KLIX 201931
FFWLIX
LAC033-037-091-125-MSC005-157-202145-
/O.EXT.KLIX.FF.W.0044.000000T0000Z-210520T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
231 PM CDT Thu May 20 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Northeastern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Western St. Helena Parish in southeastern Louisiana...
Eastern West Feliciana Parish in southeastern Louisiana...
Southwestern Amite County in southern Mississippi...
Southeastern Wilkinson County in southern Mississippi...
* Until 445 PM CDT.
* At 231 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 4 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, Centreville, Woodville, Slaughter,
Wilson, Norwood, Spillman and Pride.
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.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3101 9137 3115 9129 3115 9106 3115 9099
3071 9084 3065 9091 3068 9092 3068 9128
FLASH FLOOD...RADAR INDICATED
$$
CAB143
WGUS54 KLIX 202132
FFWLIX
LAC033-037-091-125-MSC005-157-202345-
/O.EXT.KLIX.FF.W.0044.000000T0000Z-210520T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
432 PM CDT Thu May 20 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Northeastern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Western St. Helena Parish in southeastern Louisiana...
Eastern West Feliciana Parish in southeastern Louisiana...
Southwestern Amite County in southern Mississippi...
Southeastern Wilkinson County in southern Mississippi...
* Until 645 PM CDT.
* At 432 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 5 and 8 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Zachary, Jackson, Clinton, Centreville, Woodville, Slaughter,
Wilson, Norwood, Spillman and Pride.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3101 9137 3115 9129 3115 9106 3115 9099
3071 9084 3065 9091 3068 9092 3068 9128
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS
$$357
WGUS54 KLIX 202338
FFWLIX
LAC033-037-091-125-MSC005-157-210145-
/O.EXT.KLIX.FF.W.0044.000000T0000Z-210521T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
638 PM CDT Thu May 20 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Northeastern East Baton Rouge Parish in southeastern Louisiana...
East Feliciana Parish in southeastern Louisiana...
Western St. Helena Parish in southeastern Louisiana...
Eastern West Feliciana Parish in southeastern Louisiana...
Southwestern Amite County in southern Mississippi...
Southeastern Wilkinson County in southern Mississippi...
* Until 845 PM CDT.
* At 638 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 5 and 8 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, Centreville, Woodville, Slaughter,
Wilson, Norwood, Spillman and Pride.
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.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3101 9137 3115 9129 3115 9106 3115 9099
3071 9084 3065 9091 3068 9092 3068 9128
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS
$$The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:03 PM CDT | Special Weather Statement | LIX | Saint Tammany | 42 min |
| May 19, 7:24 PM CDT | Special Marine Warning | LIX | 81 min | |
| May 19, 8:00 PM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 25 min |
| May 19, 8:30 PM CDT | Special Marine Warning | LIX | 30 min | |
| May 19, 9:19 PM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Iberville, Livingston | 116 min |
| May 20, 3:42 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Iberville, Jefferson, Plaquemines, Saint Charles and 3 more | 63 min |
| May 20, 4:05 AM CDT | Special Marine Warning | LIX | 55 min | |
| May 20, 4:18 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:03 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:33 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 7:00 AM CDT | Special Weather Statement | LIX | Assumption, Jefferson, Lafourche, Saint Charles, Saint James | 60 min |
| May 20, 7:39 AM CDT | Tornado Warning | LIX | Jefferson | 8 min |
| May 20, 7:42 AM CDT | Special Marine Warning | LIX | 33 min | |
| May 20, 8:27 AM CDT | Special Marine Warning | LIX | 63 min | |
| May 20, 8:37 AM CDT | Areal Flood Advisory | LIX | Ascension, Assumption, East Baton Rouge, Iberville, Lafourche, Livingston and 3 more | 52 min |
| May 20, 8:58 AM CDT | Tornado Warning | LIX | East Feliciana | 13 min |
| May 20, 9:29 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge | 9 hr |
| May 20, 10:04 AM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Livingston, Saint James and 1 more | 13 hr |
| May 20, 10:52 AM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 19 min |
| May 20, 11:22 AM CDT | Special Marine Warning | LIX | 38 min | |
| May 20, 11:26 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Livingston, Saint Helena | 94 min |
| May 20, 2:16 PM CDT | River Flood Warning | LIX | East Baton Rouge, Livingston | 68 hr |
| May 20, 2:22 PM CDT | River Flood Warning | LIX | Ascension, Livingston | 4 days |
| May 20, 2:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 2:40 PM CDT | River Flood Warning | LIX | East Baton Rouge | 61 hr |
| May 20, 3:29 PM CDT | Special Marine Warning | LIX | 61 min | |
| May 20, 3:56 PM CDT | Gale Warning | LIX | 19 hr | |
| May 20, 3:56 PM CDT | Small Craft Advisory | LIX | 60 hr | |
| May 20, 3:56 PM CDT | Wind Advisory | LIX | Orleans, Saint Bernard, Saint John the Baptist, Saint Tammany | 27 hr |
| May 20, 4:30 PM CDT | Special Marine Warning | LIX | 90 min | |
| May 20, 4:58 PM CDT | Special Weather Statement | LIX | Lafourche, Terrebonne | 47 min |
| May 20, 5:16 PM CDT | Areal Flood Advisory | LIX | Assumption, Jefferson, Lafourche, Terrebonne | 3 hr |
| May 20, 6:42 PM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, Saint Helena, West Baton Rouge | 4 hr |
Nearby
Flash Flood Warnings in Louisiana, 2021Flash Flood Warnings in Mississippi, 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.