Alert archive / Louisiana / Tornado Warnings in 1991

Tornado Warning 7, NWS New Orleans, LA

April 27, 1991Catahoula Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 27, 1991, 4:40 PM CDT for Catahoula Parish, Louisiana. It was in force for 20 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1991, 4:40 PM CDT (21:40 UTC)
Expired
Apr 27, 1991, 5:00 PM CDT
In force
20 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Catahoula Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.7 hours before the alert went out and 182 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 1991-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 1991-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 square meters per square second.19395878Sfc1 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
16 J/kg
Mixed-layer CIN
-470 J/kg
Mixed-layer LCL
1247 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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
Apr 26, 9:08 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, West Baton Rouge37 min
Apr 26, 9:08 PM CDTSevere Thunderstorm WarningLIXPointe Coupee37 min

Nearby

Tornado Warnings in Louisiana, 1991Every tornado warning in 1991Tornadoes in 1991

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.