Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 97, NWS New Orleans, LA

April 28, 1991Pointe Coupee Parish, West Feliciana Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 28, 1991, 7:01 PM CDT for Pointe Coupee Parish, West Feliciana Parish, Louisiana. It was in force for 44 min.

The area

The counties it named.

The facts

Issued: Apr 28, 1991, 7:01 PM CDT (00:01 UTC)
Expired: Apr 28, 1991, 7:45 PM CDT
In force: 44 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Pointe Coupee Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2308 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 581 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 7.8

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 28, 2:30 PM CDT, 4 hours 31 minutes before

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Special weather statement, Apr 28, 3:06 PM CDT, 3 hours 55 minutes before

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Special weather statement, Apr 28, 4:38 PM CDT, 2 hours 23 minutes before

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Special weather statement, Apr 28, 5:30 PM CDT, 1 hour 31 minutes before

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Local storm report, Apr 28, 6:53 PM CDT, 8 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 5:52 PM CDT	Severe Thunderstorm Warning	LIX	Iberville	68 min
Apr 29, 5:57 PM CDT	Severe Thunderstorm Warning	LIX	Terrebonne	63 min
Apr 29, 6:22 PM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge	68 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1991 Every severe thunderstorm warning 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.