Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 94, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2021, 8:55 PM CDT for Livingston Parish, Tangipahoa Parish, Louisiana. It was in force for 3 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, 8:55 PM CDT (01:55 UTC)
- Expired
- Aug 30, 2021, 12:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Considerable
- Flood severity
- None
Counties Livingston Parish, LA, Tangipahoa Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 1.9 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.
346
WGUS54 KLIX 300155
FFWLIX
LAC063-105-300500-
/O.NEW.KLIX.FF.W.0094.210830T0155Z-210830T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
855 PM CDT Sun Aug 29 2021
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 midnight CDT.
* At 855 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain in Hammond. Between 3 and 6 inches of rain have fallen.
Additional rainfall amounts of 3 to 6 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Storms and increasing
surge will produce flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of 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...
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...CONSIDERABLE
$$
CAB1 follow-up statement
340
WGUS74 KLIX 300329
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
1029 PM CDT Sun Aug 29 2021
LAC063-105-300500-
/O.CON.KLIX.FF.W.0094.000000T0000Z-210830T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Livingston LA-Tangipahoa LA-
1029 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR HAMMOND, TICKFAW, AND PONCHATOULA. ...
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT TONIGHT
FOR EASTERN LIVINGSTON AND SOUTHERN TANGIPAHOA PARISHES...
At 1029 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain in Hammond. Between 5 and 9 inches of rain have fallen.
Additional rainfall amounts of 4 to 8 inches are possible in the
warned area. Flash flooding is ongoing and will continue to get
worse.
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 and reports.
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
$$
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, 8:35 PM CDT | Flash Flood Warning | LIX | Saint Charles, Saint John the Baptist | 6 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.