Alert archive / Louisiana / Tornado Warnings in 1991

Tornado Warning 6, NWS New Orleans, LA

April 19, 1991Assumption Parish, Saint Martin Parish, St. Mary Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 19, 1991, 2:37 PM CDT for Assumption Parish, Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Apr 19, 1991, 2:37 PM CDT (19:37 UTC)
Expired
Apr 19, 1991, 3:45 PM CDT
In force
68 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Assumption Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.6 hours before the alert went out and 297 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 1991-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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 1991-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
49 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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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 18, 7:45 PM CDTSevere Thunderstorm WarningLIXConcordia30 min
Apr 19, 2:29 PM CDTSevere Thunderstorm WarningLIXOrleans, Saint Bernard2 hr
Apr 19, 2:33 PM CDTSevere Thunderstorm WarningLIXWashington57 min
Apr 19, 3:20 PM CDTSevere Thunderstorm WarningLIXLafourche55 min
Apr 19, 3:27 PM CDTSevere Thunderstorm WarningLIXSaint Tammany63 min
Apr 19, 5:12 PM CDTSevere Thunderstorm WarningLIXOrleans63 min
Apr 19, 6:11 PM CDTSevere Thunderstorm WarningLIXWest Feliciana34 min
Apr 19, 6:42 PM CDTSevere Thunderstorm WarningLIXEast Feliciana, Pointe Coupee, West Feliciana48 min
Apr 19, 6:42 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge48 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.