Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 73, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Jul 15, 2021, 12:48 PM CDT for Jefferson Parish, Louisiana. It was in force for 49 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
- Jul 15, 2021, 12:48 PM CDT (17:48 UTC)
- Expired
- Jul 15, 2021, 1:37 PM CDT
- In force
- 49 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
County Jefferson Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.8 hours before the alert went out and 51 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
- 2331 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 619 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
105
WGUS54 KLIX 151748
FFWLIX
LAC051-152100-
/O.NEW.KLIX.FF.W.0073.210715T1748Z-210715T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
1248 PM CDT Thu Jul 15 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
North Central Jefferson Parish in southeastern Louisiana...
* Until 400 PM CDT.
* At 1248 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. 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 and Metairie.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 227 and 230.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2997 9013 2998 9020 3002 9018 3002 9014
3002 9013 3002 9012
FLASH FLOOD...RADAR INDICATED
$$
CAB2 follow-up statements
168
WGUS74 KLIX 151814
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
114 PM CDT Thu Jul 15 2021
LAC051-152100-
/O.CON.KLIX.FF.W.0073.000000T0000Z-210715T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-
114 PM CDT Thu Jul 15 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON FOR NORTH CENTRAL JEFFERSON PARISH...
At 114 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1.5 and 3 inches of rain have
fallen. Additional rainfall amounts of 0.5 to 0.8 inches are
possible in the warned area. The rain is coming to an end but rapid
runoff may still lead to some flash flooding.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
New Orleans and Metairie.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 227 and 230.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2997 9013 2998 9020 3002 9018 3002 9014
3002 9013 3002 9012
FLASH FLOOD...RADAR INDICATED
$$
CAB288
WGUS74 KLIX 151837
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
137 PM CDT Thu Jul 15 2021
LAC051-151847-
/O.CAN.KLIX.FF.W.0073.000000T0000Z-210715T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-
137 PM CDT Thu Jul 15 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTH CENTRAL JEFFERSON
PARISH...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 2997 9013 2998 9020 3002 9018 3002 9014
3002 9013 3002 9012
$$
CABThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 10:23 AM CDT | Special Weather Statement | LIX | Terrebonne | 37 min |
| Jul 15, 11:40 AM CDT | Special Weather Statement | LIX | Iberville | 35 min |
| Jul 15, 11:42 AM CDT | Special Weather Statement | LIX | Jefferson | 63 min |
| Jul 15, 11:48 AM CDT | Special Weather Statement | LIX | Saint James | 57 min |
| Jul 15, 12:21 PM CDT | Special Weather Statement | LIX | Saint Charles | 54 min |
| Jul 15, 12:31 PM CDT | Areal Flood Advisory | LIX | Jefferson | 65 min |
| Jul 15, 12:45 PM CDT | Special Weather Statement | LIX | Washington | 75 min |
| Jul 15, 12:53 PM CDT | Special Weather Statement | LIX | Saint John the Baptist | 82 min |
| Jul 15, 1:11 PM CDT | Special Weather Statement | LIX | Orleans | 79 min |
| Jul 15, 1:33 PM CDT | Special Weather Statement | LIX | West Feliciana | 57 min |
| Jul 15, 1:50 PM CDT | Special Weather Statement | LIX | Saint Tammany | 55 min |
| Jul 15, 1:58 PM CDT | Special Weather Statement | LIX | East Baton Rouge | 62 min |
| Jul 15, 2:35 PM CDT | Special Weather Statement | LIX | Tangipahoa | 55 min |
| Jul 15, 2:47 PM CDT | Special Weather Statement | LIX | Saint James | 58 min |
| Jul 15, 3:31 PM CDT | Special Weather Statement | LIX | East Feliciana | 29 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.