Alert archive / Louisiana / Flash Flood Warnings in 2024

Flash Flood Warning 58, NWS New Orleans, LA

July 5, 2024Orleans Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Jul 5, 2024, 4:39 PM CDT for Orleans 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 5, 2024, 4:39 PM CDT (21:39 UTC)
Expired
Jul 5, 2024, 7:05 PM CDT
In force
2 hr
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Flood severity
None

County Orleans Parish, LA

The radar

The Hammond radar (KHDC), 68 km from the middle of the area, began a volume at 21:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.7 hours before the alert went out and 30 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 12:00Z on 2024-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2681 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2024-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -64 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
2681 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-64 m²/s²
0-3 km storm-relative helicity
-37 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 5, 6:49 AM CDTSpecial Marine WarningLIX56 min
Jul 5, 7:16 AM CDTSpecial Marine WarningLIX59 min
Jul 5, 7:58 AM CDTSpecial Marine WarningLIX62 min
Jul 5, 9:06 AM CDTSpecial Marine WarningLIX24 min
Jul 5, 4:28 PM CDTAreal Flood AdvisoryLIXOrleans, Saint Bernard3 hr
Jul 5, 4:32 PM CDTSpecial Marine WarningLIX29 min
Jul 5, 4:45 PM CDTSpecial Weather StatementLIXWest Feliciana45 min
Jul 5, 5:44 PM CDTSpecial Weather StatementLIXPointe Coupee31 min
Jul 5, 5:57 PM CDTSpecial Marine WarningLIX63 min
Jul 5, 6:23 PM CDTSpecial Weather StatementLIXSaint Tammany37 min
Jul 5, 6:27 PM CDTSpecial Marine WarningLIX63 min
Jul 5, 6:32 PM CDTAreal Flood AdvisoryLIXPointe Coupee50 min
Jul 5, 6:39 PM CDTAreal Flood AdvisoryLIXAscension, Iberville111 min
Jul 5, 4:01 PM CDTSpecial Weather StatementLIXAmite29 min
Jul 5, 5:41 PM CDTSpecial Weather StatementLIXHarrison49 min
Jul 5, 6:15 PM CDTAreal Flood AdvisoryLIXHarrison67 min

Nearby

Flash Flood Warnings in Louisiana, 2024Every flash flood warning in 2024

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; radar from the NEXRAD Level II archive.