Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 114, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Sep 6, 2021, 1:54 PM CDT for 4 parishes in Louisiana. It was in force for 111 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2021, 1:54 PM CDT (18:54 UTC)
- Expired
- Sep 6, 2021, 3:45 PM CDT
- In force
- 111 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.9 hours before the alert went out and 54 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
- 2809 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
657
WGUS54 KLIX 061854
FFWLIX
LAC051-071-075-087-062045-
/O.NEW.KLIX.FF.W.0114.210906T1854Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
154 PM CDT Mon Sep 6 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
North Central Jefferson Parish in southeastern Louisiana...
Southwestern Orleans Parish in southeastern Louisiana...
Northwestern Plaquemines Parish in southeastern Louisiana...
West Central St. Bernard Parish in southeastern Louisiana...
* Until 345 PM CDT.
* At 154 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. The expected rainfall rate is 1 to 3 inches in 1
hour. Additional rainfall amounts of 1 to 3 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...
New Orleans, Timberlane, Belle Chasse, Harvey, Marrero, Chalmette,
Avondale, Gretna, Harahan, Westwego, Jean Lafitte, Terrytown,
Woodmere, Estelle, Meraux, Poydras, Violet, Bridge City, Lafitte
and Waggaman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2992 9006 2992 9003 2996 8990 2991 8983
2985 8990 2984 8990 2974 9006 2974 9007
2974 9011 2976 9013 2993 9022
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$4 follow-up statements
361
WGUS74 KLIX 061922
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
222 PM CDT Mon Sep 6 2021
LAC051-071-075-087-062045-
/O.CON.KLIX.FF.W.0114.000000T0000Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-Plaquemines LA-St. Bernard LA-
222 PM CDT Mon Sep 6 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON FOR NORTH CENTRAL JEFFERSON, SOUTHWESTERN ORLEANS,
NORTHWESTERN PLAQUEMINES AND WEST CENTRAL ST. BERNARD PARISHES...
At 222 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. The expected rainfall rate is 1 to 3 inches in 1 hour.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
New Orleans, Belle Chasse, Timberlane, Harvey, Chalmette, Marrero,
Gretna, Westwego, Jean Lafitte, Terrytown, Woodmere, Estelle,
Meraux, Poydras, Violet and Bridge City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2992 9006 2992 9003 2993 8999 2996 8990
2991 8983 2985 8990 2984 8990 2974 9006
2974 9007 2974 9008 2977 9011 2992 9016
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$
MW190
WGUS74 KLIX 061929
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
229 PM CDT Mon Sep 6 2021
LAC051-071-075-087-062045-
/O.CON.KLIX.FF.W.0114.000000T0000Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-Plaquemines LA-St. Bernard LA-
229 PM CDT Mon Sep 6 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON FOR NORTH CENTRAL JEFFERSON, SOUTHWESTERN ORLEANS,
NORTHWESTERN PLAQUEMINES AND WEST CENTRAL ST. BERNARD PARISHES...
At 229 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 to 3 inches in 1 hour.
Additional rainfall amounts of 1 to 3 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...
New Orleans, Belle Chasse, Timberlane, Harvey, Chalmette, Marrero,
Gretna, Jean Lafitte, Terrytown, Woodmere, Meraux, Poydras, Violet
and Estelle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2992 9012 2992 9006 2992 9003 2993 8999
2993 8998 2996 8990 2991 8983 2985 8990
2984 8990 2974 9006 2974 9007 2974 9008
2978 9009
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$
MW216
WGUS74 KLIX 061936
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
236 PM CDT Mon Sep 6 2021
LAC051-061946-
/O.CAN.KLIX.FF.W.0114.000000T0000Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-
236 PM CDT Mon Sep 6 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL JEFFERSON
PARISH...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
LAT...LON 2993 8999 2993 8998 2996 8990 2991 8983
2985 8990 2984 8990 2985 8998 2985 9003
2987 9002 2990 9001 2992 9003
$$
LAC071-075-087-062045-
/O.CON.KLIX.FF.W.0114.000000T0000Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orleans LA-Plaquemines LA-St. Bernard LA-
236 PM CDT Mon Sep 6 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM CDT THIS
AFTERNOON FOR SOUTH CENTRAL ORLEANS, NORTHWESTERN PLAQUEMINES AND
WEST CENTRAL ST. BERNARD PARISHES...
At 236 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 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...
New Orleans, Chalmette, Belle Chasse, Meraux, Violet, Poydras and
Terrytown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2993 8999 2993 8998 2996 8990 2991 8983
2985 8990 2984 8990 2985 8998 2985 9003
2987 9002 2990 9001 2992 9003
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR
$$
CAB034
WGUS74 KLIX 062039
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
339 PM CDT Mon Sep 6 2021
LAC071-075-087-062049-
/O.EXP.KLIX.FF.W.0114.000000T0000Z-210906T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orleans LA-Plaquemines LA-St. Bernard LA-
339 PM CDT Mon Sep 6 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 345 PM CDT THIS AFTERNOON FOR
SOUTH CENTRAL ORLEANS, NORTHWESTERN PLAQUEMINES AND WEST CENTRAL ST.
BERNARD PARISHES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 2993 8999 2993 8998 2996 8990 2991 8983
2985 8990 2984 8990 2985 8998 2985 9003
2987 9002 2990 9001 2992 9003
$$The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 4:00 AM CDT | Flash Flood Watch | LIX | Assumption, East Baton Rouge, East Feliciana, Iberville, Orleans, Pointe Coupee and 9 more | 17 hr |
| Sep 6, 9:39 AM CDT | Special Weather Statement | LIX | Washington | 36 min |
| Sep 6, 12:45 PM CDT | Special Weather Statement | LIX | Lafourche | 30 min |
| Sep 6, 12:47 PM CDT | Special Weather Statement | LIX | Saint Charles | 28 min |
| Sep 6, 12:49 PM CDT | Special Weather Statement | LIX | Orleans | 26 min |
| Sep 6, 1:05 PM CDT | Areal Flood Advisory | LIX | Lafourche, Saint Charles | 115 min |
| Sep 6, 1:17 PM CDT | Special Weather Statement | LIX | Orleans, Saint Charles | 58 min |
| Sep 6, 1:24 PM CDT | Special Marine Warning | LIX | 66 min | |
| Sep 6, 1:30 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Charles | 81 min |
| Sep 6, 1:37 PM CDT | Special Marine Warning | LIX | 98 min |
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.