Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 2, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Mar 15, 2021, 7:15 PM CDT for Jefferson Parish, Orleans Parish, Louisiana. It was in force for 53 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
- Mar 15, 2021, 7:15 PM CDT (00:15 UTC)
- Expired
- Mar 15, 2021, 8:08 PM CDT
- In force
- 53 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jefferson Parish, LA, Orleans Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 0.3 hours before the alert went out and 54 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
- 1587 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted.
802
WGUS54 KLIX 160015
FFWLIX
LAC051-071-160200-
/O.NEW.KLIX.FF.W.0002.210316T0015Z-210316T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
715 PM CDT Mon Mar 15 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northwestern Jefferson Parish in southeastern Louisiana...
Western Orleans Parish in southeastern Louisiana...
* Until 900 PM CDT.
* At 715 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
New Orleans, Metairie, Avondale, Jefferson, Harahan, Elmwood,
River Ridge, Bridge City and Waggaman.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 2992 9019 2992 9024 2995 9025 3003 9019
3002 9016 3002 9011 3003 9011 3003 9010
2998 9012
FLASH FLOOD...RADAR INDICATED
$$
CAB2 follow-up statements
106
WGUS74 KLIX 160053
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
753 PM CDT Mon Mar 15 2021
LAC051-071-160200-
/O.CON.KLIX.FF.W.0002.000000T0000Z-210316T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-
753 PM CDT Mon Mar 15 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING
FOR NORTHWESTERN JEFFERSON AND WESTERN ORLEANS PARISHES...
At 753 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3.5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
New Orleans, Metairie, Avondale, Jefferson, Harahan, Elmwood,
River Ridge, Bridge City and Waggaman.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 2992 9019 2992 9024 2995 9025 3003 9019
3002 9016 3002 9011 3003 9011 3003 9010
2998 9012
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.25-1 INCH IN 1 HOUR
$$
CAB582
WGUS74 KLIX 160108
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
808 PM CDT Mon Mar 15 2021
LAC051-071-160118-
/O.CAN.KLIX.FF.W.0002.000000T0000Z-210316T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson LA-Orleans LA-
808 PM CDT Mon Mar 15 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN JEFFERSON AND
WESTERN ORLEANS PARISHES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 2992 9019 2992 9024 2995 9025 3003 9019
3002 9016 3002 9011 3003 9011 3003 9010
2998 9012
$$
CABThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 7:04 PM CDT | Areal Flood Warning | LIX | Jefferson, Orleans | 11 min |
| Mar 16, 3:41 PM CDT | Small Craft Advisory | LIX | 3 days |
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.