Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 93, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2021, 8:35 PM CDT for Saint Charles Parish, Saint John the Baptist Parish, Louisiana. It was in force for 6 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, 8:35 PM CDT (01:35 UTC)
- Expired
- Aug 30, 2021, 2:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Catastrophic
- Flood severity
- None
Counties Saint Charles Parish, LA, Saint John the Baptist Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.6 hours before the alert went out and 79 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
- 25 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 679 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
456
WGUS54 KLIX 300135
FFWLIX
LAC089-095-300530-
/O.NEW.KLIX.FF.W.0093.210830T0135Z-210830T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
835 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR LAPLACE...
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
St. Charles Parish in southeastern Louisiana...
St. John The Baptist Parish in southeastern Louisiana...
* Until 1230 AM CDT.
* At 835 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 6 and 10 inches of rain
have fallen. Additional rainfall amounts of 4 to 6 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
This is a FLASH FLOOD EMERGENCY for Laplace. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
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...
Hahnville, Laplace, Reserve, Killona, Taft, Montz, Norco, New
Sarpy, Edgard, Destrehan, Boutte, Paradis, Luling, St. Rose,
Garyville, Bayou Gauche, Des Allemands, Ama and Wallace.
This includes the following Interstates...
Interstate 55 in Louisiana between mile markers 1 and 6.
Interstate 10 in Louisiana between mile markers 198 and 212...and
between mile markers 215 and 220.
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.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3018 9064 3017 9054 3018 9043 3012 9043
3007 9040 3006 9038 3005 9029 2979 9031
2981 9047 2987 9048 2990 9053 2990 9064
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$2 follow-up statements
019
WGUS74 KLIX 300245
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
945 PM CDT Sun Aug 29 2021
LAC089-095-300530-
/O.CON.KLIX.FF.W.0093.000000T0000Z-210830T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Charles LA-St. John The Baptist LA-
945 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR LAPLACE...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT MONDAY
FOR ST. CHARLES AND ST. JOHN THE BAPTIST PARISHES...
At 945 PM CDT, Doppler radar indicated Ida's eyewall producing very
heavy rain in LaPlace. Reports coming in of people trapped in homes
in LaPlace. Water completely surrounding a hotel. Numerous people
requesting to be rescued. Between 6 and 12 inches of rain have
fallen. Additional rainfall amounts of 4 to 6 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
This is a FLASH FLOOD EMERGENCY for Laplace. This is a PARTICULARLY
DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
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...
Hahnville, Laplace, Reserve, Killona, Taft, Montz, Norco, New
Sarpy, Edgard, Destrehan, Boutte, Paradis, Luling, St. Rose,
Garyville, Bayou Gauche, Des Allemands, Ama and Wallace.
This includes the following Interstates...
Interstate 55 in Louisiana between mile markers 1 and 6.
Interstate 10 in Louisiana between mile markers 198 and 212...and
between mile markers 215 and 220.
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.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3018 9064 3017 9054 3018 9043 3012 9043
3007 9040 3006 9038 3005 9029 2979 9031
2981 9047 2987 9048 2990 9053 2990 9064
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
CAB060
WGUS54 KLIX 300515
FFWLIX
LAC089-095-300730-
/O.EXT.KLIX.FF.W.0093.000000T0000Z-210830T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1215 AM CDT Mon Aug 30 2021
...FLASH FLOOD EMERGENCY FOR LAPLACE...
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
St. Charles Parish in southeastern Louisiana...
St. John The Baptist Parish in southeastern Louisiana...
* Until 230 AM CDT.
* At 1215 AM CDT, emergency management reported thunderstorms
producing heavy rain in People trapped on the top of homes, roads
completely flooded, and high water rescues are trying to get out.
. Between 6 and 13 inches of rain have fallen. Additional rainfall
amounts of 1 to 2 inches are possible in the warned area. Flash
flooding is ongoing from the combination of heavy rain and storm
surge.
This is a FLASH FLOOD EMERGENCY for Laplace. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Emergency management 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...
Hahnville, Laplace, Reserve, Killona, Taft, Montz, Norco, New
Sarpy, Edgard, Destrehan, Boutte, Paradis, Luling, St. Rose,
Garyville, Bayou Gauche, Des Allemands, Ama and Wallace.
This includes the following Interstates...
Interstate 55 in Louisiana between mile markers 1 and 6.
Interstate 10 in Louisiana between mile markers 198 and 212...and
between mile markers 215 and 220.
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.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3018 9064 3017 9054 3018 9043 3012 9043
3007 9040 3006 9038 3005 9029 2979 9031
2981 9047 2987 9048 2990 9053 2990 9064
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, 7:48 PM CDT | Flash Flood Warning | LIX | Saint Charles, Saint John the Baptist | 2 hr |
| Aug 29, 8:00 PM CDT | Special Marine Warning | LIX | 30 min | |
| Aug 29, 8:22 PM CDT | Tornado Warning | LIX | Saint Tammany | 38 min |
| Aug 29, 8:55 PM CDT | Flash Flood Warning | LIX | Livingston, Tangipahoa | 3 hr |
| Aug 29, 9:05 PM CDT | River Flood Warning | LIX | Saint Tammany | 12 days |
| Aug 29, 9:05 PM CDT | River Flood Warning | LIX | Saint Tammany | 21 days |
| Aug 29, 9:05 PM CDT | River Flood Warning | LIX | Washington | 63 hr |
| Aug 29, 9:05 PM CDT | River Flood Warning | LIX | Saint Tammany, Washington | 11 days |
| Aug 29, 10:39 PM CDT | Special Marine Warning | LIX | 51 min | |
| Aug 29, 10:48 PM CDT | Flash Flood Warning | LIX | Jefferson | 15 hr |
| Aug 29, 10:55 PM CDT | Special Marine Warning | LIX | 20 min | |
| Aug 29, 11:45 PM CDT | Flash Flood Warning | LIX | Plaquemines | 10 hr |
| Aug 29, 11:50 PM CDT | Flash Flood Warning | LIX | Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington | 3 hr |
| Aug 30, 12:05 AM CDT | Flash Flood Warning | LIX | Livingston, Tangipahoa | 12 hr |
| Aug 30, 1:24 AM CDT | Flash Flood Warning | LIX | Livingston, Saint Helena | 8 hr |
| Aug 30, 2:24 AM CDT | Flash Flood Warning | LIX | Saint Charles, Saint John the Baptist | 8 hr |
| Aug 30, 2:39 AM CDT | Flash Flood Warning | LIX | Saint Tammany | 9 hr |
| Aug 30, 2:55 AM CDT | Flash Flood Warning | LIX | Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington | 5 hr |
| Aug 30, 3:55 AM CDT | Flash Flood Warning | LIX | East Feliciana, Saint Helena, Tangipahoa, Washington | 5 hr |
| Aug 30, 4:19 AM CDT | Small Craft Advisory | LIX | 39 hr | |
| Aug 30, 4:51 AM CDT | Coastal Flood Advisory | LIX | Assumption | 15 hr |
| Aug 30, 7:15 AM CDT | Special Marine Warning | LIX | 30 min | |
| Aug 30, 7:18 AM CDT | Special Marine Warning | LIX | 27 min | |
| Aug 30, 7:45 AM CDT | Flash Flood Warning | LIX | Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington | 3 hr |
| Aug 30, 9:01 AM CDT | Special Marine Warning | LIX | 89 min | |
| Aug 30, 9:58 AM CDT | Areal Flood Warning | LIX | Jefferson, Lafourche, Livingston, Plaquemines, Saint Charles, Saint James and 1 more | 60 hr |
| Aug 30, 10:53 AM CDT | Areal Flood Warning | LIX | Saint Tammany, Tangipahoa, Washington | 35 hr |
| Aug 30, 11:04 AM CDT | Areal Flood Warning | LIX | Saint Helena, Saint Tammany, Tangipahoa, Washington | 35 hr |
| Aug 30, 11:34 AM CDT | Areal Flood Warning | LIX | Saint Tammany, Washington | 34 hr |
| Aug 30, 12:24 PM CDT | Areal Flood Warning | LIX | Ascension, Livingston, Saint John the Baptist, Saint Tammany, Tangipahoa | 33 hr |
| Aug 30, 2:57 PM CDT | Heat Advisory | LIX | Assumption, East Baton Rouge, Iberville, Orleans, Saint Bernard, Saint James and 2 more | 26 hr |
| Aug 30, 6:10 PM CDT | Special Marine Warning | LIX | 95 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.