Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 238, NWS New Orleans, LA

July 22, 1997Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jul 22, 1997, 4:53 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 52 min. 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, 1997, 4:53 PM CDT (21:53 UTC)
Expired
Jul 22, 1997, 5:45 PM CDT
In force
52 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.9 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 12:00Z on 1997-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3464 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 12:00Z on 1997-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
3464 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
603 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 2:56 PM CDTSevere Thunderstorm WarningLIXSaint Tammany49 min
Jul 22, 4:33 PM CDTSevere Thunderstorm WarningLIXWashington42 min
Jul 22, 5:28 PM CDTSevere Thunderstorm WarningLIXSaint Helena47 min
Jul 22, 5:44 PM CDTSevere Thunderstorm WarningLIXOrleans61 min
Jul 22, 1:50 PM CDTSevere Thunderstorm WarningLIXJackson40 min
Jul 22, 2:53 PM CDTSevere Thunderstorm WarningLIXHarrison, Jackson37 min
Jul 22, 3:35 PM CDTSevere Thunderstorm WarningLIXHarrison40 min
Jul 22, 4:04 PM CDTSevere Thunderstorm WarningLIXWalthall41 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997Every severe thunderstorm warning in 1997

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.