Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 98, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 30, 2021, 12:05 AM CDT for Livingston Parish, Tangipahoa Parish, Louisiana. It was in force for 12 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 30, 2021, 12:05 AM CDT (05:05 UTC)
- Expired
- Aug 30, 2021, 12:00 PM CDT
- In force
- 12 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Catastrophic
- Flood severity
- None
Counties Livingston Parish, LA, Tangipahoa Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 5.1 hours before the alert went out and 85 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.
850
WGUS54 KLIX 300505
FFWLIX
LAC063-105-301100-
/O.NEW.KLIX.FF.W.0098.210830T0505Z-210830T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1205 AM CDT Mon Aug 30 2021
...FLASH FLOOD EMERGENCY FOR HAMMOND, TICKFAW, AND PONCHATOULA. ...
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Eastern Livingston Parish in southeastern Louisiana...
Southern Tangipahoa Parish in southeastern Louisiana...
* Until 600 AM CDT.
* At 1205 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain in Hammond. Between 8 and 14 inches of rain have
fallen. Additional rainfall amounts of 4 to 8 inches are possible
in the warned area. Flash flooding is ongoing or expected to begin
shortly.
This is a FLASH FLOOD EMERGENCY for Hammond, Tickfaw, and
Ponchatoula. . 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...
Hammond, Ponchatoula, Livingston, Albany, Springfield, Natalbany,
Robert, Whitehall, Killian and Tickfaw.
This includes the following Interstates...
Interstate 55 in Louisiana between mile markers 23 and 38.
Interstate 12 between mile markers 20 and 52.
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 3060 9063 3060 9057 3062 9025 3039 9025
3039 9051 3033 9055 3026 9071 3047 9080
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
CAB3 follow-up statements
749
WGUS54 KLIX 301048
FFWLIX
LAC063-105-301400-
/O.EXT.KLIX.FF.W.0098.000000T0000Z-210830T1400Z/
/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
548 AM CDT Mon Aug 30 2021
...FLASH FLOOD EMERGENCY FOR HAMMOND, TICKFAW, AND PONCHATOULA. ...
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Eastern Livingston Parish in southeastern Louisiana...
Southern Tangipahoa Parish in southeastern Louisiana...
* Until 900 AM CDT.
* At 548 AM CDT, Doppler radar indicated heavy rain across the area
has come to an end, however stream gauge reports continue to show
rapid rises on area streams and flash flooding will continue for
several more hours. Between 10 and 18 inches of rain have fallen.
Flash flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for Hammond, Tickfaw, and
Ponchatoula. . This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain 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...
Hammond, Ponchatoula, Livingston, Albany, Springfield, Natalbany,
Robert, Whitehall, Killian and Tickfaw.
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 3060 9063 3060 9057 3062 9025 3039 9025
3039 9051 3033 9055 3026 9071 3047 9080
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$187
WGUS74 KLIX 301333
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
833 AM CDT Mon Aug 30 2021
LAC063-105-301400-
/O.CON.KLIX.FF.W.0098.000000T0000Z-210830T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Livingston LA-Tangipahoa LA-
833 AM CDT Mon Aug 30 2021
...FLASH FLOOD EMERGENCY FOR HAMMOND, TICKFAW, AND PONCHATOULA. ...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING
FOR EASTERN LIVINGSTON AND SOUTHERN TANGIPAHOA PARISHES...
At 833 AM CDT, Flooding is continuing across the warned area this
morning after between 10 and 18 inches of rain have fallen. Flash
flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for Hammond, Tickfaw, and
Ponchatoula. . This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain 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...
Hammond, Ponchatoula, Livingston, Albany, Springfield, Natalbany,
Robert, Whitehall, Killian and Tickfaw.
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 3060 9063 3060 9057 3062 9025 3039 9025
3039 9051 3033 9055 3026 9071 3047 9080
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$398
WGUS54 KLIX 301335
FFWLIX
LAC063-105-301700-
/O.EXT.KLIX.FF.W.0098.000000T0000Z-210830T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
Issued by National Weather Service Lake Charles LA
835 AM CDT Mon Aug 30 2021
...FLASH FLOOD EMERGENCY FOR HAMMOND, TICKFAW, AND PONCHATOULA. ...
The National Weather Service in New Orleans has extended the
* Flash Flood Warning for...
Eastern Livingston Parish in southeastern Louisiana...
Southern Tangipahoa Parish in southeastern Louisiana...
* Until noon CDT.
* At 835 AM CDT, Flooding is continuing across the warned area this
morning after between 10 and 18 inches of rain have fallen. Flash
flooding is already occurring.
This is a FLASH FLOOD EMERGENCY for Hammond, Tickfaw, and
Ponchatoula. . This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW! Life threatening flash flooding of
low water crossings, small creeks and streams, urban
areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Hammond, Ponchatoula, Livingston, Albany, Springfield, Natalbany,
Robert, Whitehall, Killian and Tickfaw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is an extremely dangerous and life-threatening situation. Do
not attempt to travel unless you are fleeing an area subject to
flooding or under an evacuation order.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3060 9063 3060 9057 3062 9025 3039 9025
3039 9051 3033 9055 3026 9071 3047 9080
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$The 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, 8:35 PM CDT | Flash Flood Warning | LIX | Saint Charles, Saint John the Baptist | 6 hr |
| 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, 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.