Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 52, NWS New Orleans, LA

August 30, 1990Catahoula Parish, Concordia Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 30, 1990, 2:28 PM CDT for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Aug 30, 1990, 2:28 PM CDT (19:28 UTC)
Expired
Aug 30, 1990, 3:30 PM CDT
In force
62 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Catahoula Parish, LA, Concordia Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.5 hours before the alert went out and 178 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, Jackson, MS at 12:00Z on 1990-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2667 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, Jackson, MS at 12:00Z on 1990-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
2667 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
1276 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
72 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
Aug 30, 3:16 PM CDTSevere Thunderstorm WarningLIXAvoyelles59 min
Aug 30, 4:01 PM CDTSevere Thunderstorm WarningLIXSaint Tammany59 min
Aug 30, 4:58 PM CDTSevere Thunderstorm WarningLIXSaint Tammany47 min
Aug 30, 5:46 PM CDTSevere Thunderstorm WarningLIXSaint Tammany29 min
Aug 30, 6:02 PM CDTSevere Thunderstorm WarningLIXJefferson, Orleans, Saint Bernard58 min
Aug 30, 6:15 PM CDTSevere Thunderstorm WarningLIXTangipahoa60 min
Aug 30, 6:48 PM CDTSevere Thunderstorm WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard57 min
Aug 30, 6:48 PM CDTSevere Thunderstorm WarningLIXSaint Charles57 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990

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.