Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 74, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Jul 16, 2021, 1:29 PM CDT for Orleans Parish, Louisiana. It was in force for 76 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 16, 2021, 1:29 PM CDT (18:29 UTC)
- Expired
- Jul 16, 2021, 2:45 PM CDT
- In force
- 76 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
County Orleans Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 16, 1:38 PM CDT | FLASH FLOOD | 2 Nne New Orleans, LA | HIGH WATER ON PARIS AVE UNDERPASS NEAR GENTILLY BLVD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.5 hours before the alert went out and 48 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
- 2218 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 672 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
083
WGUS54 KLIX 161829
FFWLIX
LAC071-162130-
/O.NEW.KLIX.FF.W.0074.210716T1829Z-210716T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
129 PM CDT Fri Jul 16 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Southwestern Orleans Parish in southeastern Louisiana...
* Until 430 PM CDT.
* At 129 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 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, Marrero, Jefferson, Gretna and Westwego.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 231 and 239.
Interstate 610 between mile markers 1 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3004 9004 2992 9002 2992 9003 2995 9006
2994 9006 2993 9006 2992 9007 2991 9011
2991 9013 2992 9013 2995 9014 2997 9012
3002 9012 3002 9011 3003 9011 3003 9009
3003 9008
FLASH FLOOD...RADAR INDICATED
$$
MW1 follow-up statement
907
WGUS74 KLIX 161945
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
245 PM CDT Fri Jul 16 2021
LAC071-161955-
/O.CAN.KLIX.FF.W.0074.000000T0000Z-210716T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Orleans LA-
245 PM CDT Fri Jul 16 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN ORLEANS
PARISH...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3004 9004 2992 9002 2992 9003 2995 9006
2994 9006 2993 9006 2992 9007 2991 9011
2991 9013 2992 9013 2995 9014 2997 9012
3002 9012 3002 9011 3003 9011 3003 9009
3003 9008
$$
MWThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 1:13 PM CDT | Special Weather Statement | LIX | Orleans | 32 min |
| Jul 16, 1:20 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines | 103 min |
| Jul 16, 1:45 PM CDT | Special Weather Statement | LIX | Orleans | 30 min |
| Jul 16, 2:05 PM CDT | Special Marine Warning | LIX | 55 min | |
| Jul 16, 2:14 PM CDT | Special Marine Warning | LIX | 61 min | |
| Jul 16, 2:17 PM CDT | Special Weather Statement | LIX | Lafourche | 28 min |
| Jul 16, 2:32 PM CDT | Special Weather Statement | LIX | Saint Charles | 28 min |
| Jul 16, 2:37 PM CDT | Special Weather Statement | LIX | Washington | 23 min |
| Jul 16, 2:43 PM CDT | Special Weather Statement | LIX | Saint James | 32 min |
| Jul 16, 2:48 PM CDT | Special Weather Statement | LIX | Lafourche | 27 min |
| Jul 16, 3:00 PM CDT | Special Weather Statement | LIX | Washington | 30 min |
| Jul 16, 3:13 PM CDT | Special Weather Statement | LIX | Saint James | 32 min |
| Jul 16, 3:17 PM CDT | Special Weather Statement | LIX | Iberville | 43 min |
| Jul 16, 3:24 PM CDT | Special Weather Statement | LIX | Washington | 36 min |
| Jul 16, 3:31 PM CDT | Areal Flood Advisory | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Jul 16, 3:34 PM CDT | Special Weather Statement | LIX | Tangipahoa | 26 min |
| Jul 16, 3:38 PM CDT | Special Weather Statement | LIX | Saint James | 37 min |
| Jul 16, 3:56 PM CDT | Special Weather Statement | LIX | Tangipahoa | 34 min |
| Jul 16, 4:01 PM CDT | Special Weather Statement | LIX | East Baton Rouge | 29 min |
| Jul 16, 4:06 PM CDT | Special Weather Statement | LIX | Jefferson | 24 min |
| Jul 16, 4:16 PM CDT | Areal Flood Advisory | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Jul 16, 4:28 PM CDT | Special Weather Statement | LIX | East Feliciana | 62 min |
| Jul 16, 4:35 PM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Livingston | 105 min |
| Jul 16, 5:16 PM CDT | Special Weather Statement | LIX | Saint Helena | 44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.