Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 87, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2021, 4:08 PM CDT for 6 parishes in Louisiana. It was in force for 8 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 29, 2021, 4:08 PM CDT (21:08 UTC)
- Expired
- Aug 30, 2021, 12:00 AM CDT
- In force
- 8 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Flood severity
- None
Counties Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 9.1 hours before the alert went out and 61 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3256 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
057
WGUS54 KLIX 292108
FFWLIX
LAC051-071-075-087-089-095-300300-
/O.NEW.KLIX.FF.W.0087.210829T2108Z-210830T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
408 PM CDT Sun Aug 29 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northwestern 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...
Northwestern St. Charles Parish in southeastern Louisiana...
West Central St. John The Baptist Parish in southeastern Louisiana...
* Until 1000 PM CDT.
* At 408 PM CDT, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Between 1 and 3 inches
of rain have fallen. Additional rainfall amounts of 4 to 8 inches
are possible in the warned area through this evening. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar and automated gauges.
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, Avondale, Metairie, Marrero, Harvey, Hahnville,
Timberlane, Belle Chasse, Chalmette, Laplace, East New Orleans,
Reserve, Jefferson, Gretna, Harahan, Westwego, River Ridge,
Waggaman, Elmwood and Bridge City.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 221 and 248.
Interstate 510 between mile markers 1 and 3.
Interstate 610 between mile markers 1 and 4.
Interstate 310 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3005 9067 3011 9064 3010 9051 3008 9043
2998 9034 3004 9027 3002 9007 3008 8994
3001 8988 2997 9001 2995 8991 2989 8983
2986 8990 2990 8994 2975 9003 2992 9026
2988 9037 2979 9045 2984 9047 2995 9043
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
TD3 follow-up statements
269
WGUS54 KLIX 300058
FFWLIX
LAC051-071-075-087-089-095-300500-
/O.EXT.KLIX.FF.W.0087.000000T0000Z-210830T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
758 PM CDT Sun Aug 29 2021
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Northwestern 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...
Northwestern St. Charles Parish in southeastern Louisiana...
West Central St. John The Baptist Parish in southeastern Louisiana...
* Until midnight CDT.
* At 758 PM CDT, the public reported flash flooding across the
warned area. Between 3 and 6 inches of rain have fallen.
Additional rainfall amounts of 3 to 6 inches are possible in the
warned area through midnight. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Public reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
New Orleans, Avondale, Metairie, Marrero, Harvey, Hahnville,
Timberlane, Belle Chasse, Chalmette, Laplace, East New Orleans,
Reserve, Jefferson, Gretna, Harahan, Westwego, River Ridge,
Waggaman, Elmwood and Bridge City.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 220 and 247.
Interstate 510 between mile markers 1 and 3.
Interstate 610 between mile markers 1 and 4.
Interstate 310 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3005 9067 3011 9064 3010 9051 3008 9043
2998 9034 3004 9027 3002 9007 3008 8994
3001 8988 2997 9001 2995 8991 2989 8983
2986 8990 2990 8994 2975 9003 2992 9026
2988 9037 2979 9045 2984 9047 2995 9043
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
TD625
WGUS74 KLIX 300108
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
808 PM CDT Sun Aug 29 2021
LAC051-071-075-087-089-095-300500-
/O.CON.KLIX.FF.W.0087.000000T0000Z-210830T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-Plaquemines LA-St. Bernard LA-St. Charles LA-
St. John The Baptist LA-
808 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR SOUTH SHORE AREA OF METRO NEW ORLEANS...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT
FOR NORTHWESTERN JEFFERSON, SOUTHWESTERN ORLEANS, NORTHWESTERN
PLAQUEMINES, WEST CENTRAL ST. BERNARD, NORTHWESTERN ST. CHARLES AND
WEST CENTRAL ST. JOHN THE BAPTIST PARISHES...
At 808 PM CDT, the public reported flash flooding across the warned
area. Between 4 and 7 inches of rain have fallen. Additional
rainfall amounts of 3 to 6 inches are possible in the warned area.
Flash flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for South shore area of metro New
Orleans. This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Public reported.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
GROUND NOW! Life threatening flash flooding of low water
crossings, small creeks and streams, urban areas,
highways, streets and underpasses.
Some locations that will experience flash flooding include...
New Orleans, Avondale, Metairie, Marrero, Harvey, Hahnville,
Timberlane, Belle Chasse, Chalmette, Laplace, East New Orleans,
Reserve, Jefferson, Gretna, Harahan, Westwego, River Ridge,
Waggaman, Elmwood and Bridge City.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 220 and 247.
Interstate 510 between mile markers 1 and 3.
Interstate 610 between mile markers 1 and 4.
Interstate 310 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3005 9067 3011 9064 3010 9051 3008 9043
2998 9034 3004 9027 3002 9007 3008 8994
3001 8988 2997 9001 2995 8991 2989 8983
2986 8990 2990 8994 2975 9003 2992 9026
2988 9037 2979 9045 2984 9047 2995 9043
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
TD845
WGUS74 KLIX 300242
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
942 PM CDT Sun Aug 29 2021
LAC051-071-075-087-089-095-300500-
/O.CON.KLIX.FF.W.0087.000000T0000Z-210830T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-Plaquemines LA-St. Bernard LA-St. Charles LA-
St. John The Baptist LA-
942 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR SOUTH SHORE AREA OF METRO NEW ORLEANS...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT
FOR NORTHWESTERN JEFFERSON, SOUTHWESTERN ORLEANS, NORTHWESTERN
PLAQUEMINES, WEST CENTRAL ST. BERNARD, NORTHWESTERN ST. CHARLES AND
WEST CENTRAL ST. JOHN THE BAPTIST PARISHES...
At 942 PM CDT, the public reported flash flooding across the warned
area. Between 5 and 9 inches of rain have fallen. Additional
rainfall amounts of 3 to 6 inches are possible in the warned area.
Flash flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for South shore area of metro New
Orleans. This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Public reported.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER
GROUND NOW! Life threatening flash flooding of low water
crossings, small creeks and streams, urban areas,
highways, streets and underpasses.
Some locations that will experience flash flooding include...
New Orleans, Avondale, Metairie, Marrero, Harvey, Hahnville,
Timberlane, Belle Chasse, Chalmette, Laplace, East New Orleans,
Reserve, Jefferson, Gretna, Harahan, Westwego, River Ridge,
Waggaman, Elmwood and Bridge City.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 220 and 247.
Interstate 510 between mile markers 1 and 3.
Interstate 610 between mile markers 1 and 4.
Interstate 310 between mile markers 1 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
Move to higher ground now. Act quickly to protect your life.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3005 9067 3011 9064 3010 9051 3008 9043
2998 9034 3004 9027 3002 9007 3008 8994
3001 8988 2997 9001 2995 8991 2989 8983
2986 8990 2990 8994 2975 9003 2992 9026
2988 9037 2979 9045 2984 9047 2995 9043
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
CABThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 6:23 AM CDT | Special Marine Warning | LIX | 22 min | |
| Aug 29, 7:49 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 10:30 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 1:26 PM CDT | Extreme Wind Warning | LIX | Assumption, Jefferson, Lafourche, Plaquemines, Saint Charles, Saint James and 2 more | 3 hr |
| Aug 29, 2:42 PM CDT | Special Marine Warning | LIX | 18 min | |
| Aug 29, 3:39 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 7 hr |
| Aug 29, 4:23 PM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne | 2 hr |
| Aug 29, 5:01 PM CDT | Flash Flood Warning | LIX | Plaquemines | 6 hr |
| Aug 29, 5:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:09 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 8 hr |
| Aug 29, 6:21 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 16 hr |
| Aug 29, 6:25 PM CDT | Tornado Warning | LIX | Orleans, Saint Bernard, Saint Tammany | 35 min |
| Aug 29, 6:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| Aug 29, 6:54 PM CDT | Tornado Warning | LIX | Saint Tammany | 36 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.