Alert archive / Louisiana / Flash Flood Warnings in 2022

Flash Flood Warning 44, NWS New Orleans, LA

July 22, 2022Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jul 22, 2022, 4:59 AM CDT for Tangipahoa Parish, Louisiana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 22, 2022, 4:59 AM CDT (09:59 UTC)
Expired
Jul 22, 2022, 7:18 AM CDT
In force
2 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

County Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.0 hours before the alert went out and 80 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.

Skew-T log-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2022-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1764 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2022-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1764 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 22, 1:57 AM CDTSpecial Marine WarningLIX63 min
Jul 22, 2:47 AM CDTSpecial Marine WarningLIX58 min
Jul 22, 2:50 AM CDTSpecial Weather StatementLIXSaint Tammany25 min
Jul 22, 2:55 AM CDTSpecial Marine WarningLIX65 min
Jul 22, 3:17 AM CDTSpecial Weather StatementLIXSaint Tammany, Tangipahoa28 min
Jul 22, 3:41 AM CDTSpecial Weather StatementLIXOrleans34 min
Jul 22, 3:43 AM CDTSpecial Marine WarningLIX62 min
Jul 22, 4:02 AM CDTSpecial Weather StatementLIXSaint Helena, Tangipahoa43 min
Jul 22, 4:47 AM CDTAreal Flood AdvisoryLIXSaint Tammany, Tangipahoa118 min
Jul 22, 4:51 AM CDTSpecial Weather StatementLIXAscension, East Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint John the Baptist and 1 more39 min
Jul 22, 5:31 AM CDTSpecial Weather StatementLIXAscension, East Baton Rouge, East Feliciana, Livingston, Saint James, Saint John the Baptist and 1 more44 min
Jul 22, 5:36 AM CDTAreal Flood AdvisoryLIXAscension, East Baton Rouge, Livingston, West Baton Rouge114 min
Jul 22, 6:11 AM CDTSevere Thunderstorm WarningLIXAscension, East Baton Rouge, Iberville, West Baton Rouge64 min
Jul 22, 6:17 AM CDTSpecial Weather StatementLIXEast Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge58 min
Jul 22, 6:35 AM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge2 hr
Jul 22, 7:36 AM CDTSpecial Marine WarningLIX54 min
Jul 22, 3:08 PM CDTSpecial Weather StatementLIXOrleans22 min
Jul 22, 3:20 PM CDTSpecial Weather StatementLIXOrleans25 min
Jul 22, 3:52 PM CDTSpecial Weather StatementLIXSaint Charles23 min
Jul 22, 3:59 PM CDTSpecial Weather StatementLIXWashington46 min
Jul 22, 4:09 PM CDTAreal Flood AdvisoryLIXJefferson, Orleans, Saint Bernard, Saint Charles2 hr
Jul 22, 4:36 PM CDTSpecial Marine WarningLIX26 min
Jul 22, 5:40 PM CDTSpecial Weather StatementLIXEast Feliciana, Saint Helena50 min
Jul 22, 12:48 AM CDTSpecial Weather StatementLIXPearl River27 min
Jul 22, 1:14 AM CDTSpecial Weather StatementLIXPearl River46 min
Jul 22, 1:34 AM CDTSpecial Weather StatementLIXJackson41 min
Jul 22, 1:42 AM CDTSpecial Weather StatementLIXHancock33 min
Jul 22, 2:04 AM CDTSpecial Weather StatementLIXHarrison, Jackson26 min
Jul 22, 2:16 AM CDTSpecial Weather StatementLIXHancock29 min
Jul 22, 5:12 PM CDTSpecial Weather StatementLIXAmite33 min

Nearby

Flash Flood Warnings in Louisiana, 2022Every flash flood warning in 2022

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.