Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 75, NWS Lake Charles, LA

April 29, 1991Allen Parish, Beauregard Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 29, 1991, 3:05 AM CDT for Allen Parish, Beauregard Parish, Louisiana. It was in force for 55 min.

The area

The counties it named.

The facts

Issued: Apr 29, 1991, 3:05 AM CDT (08:05 UTC)
Expired: Apr 29, 1991, 4:00 AM CDT
In force: 55 min
Issued by: NWS Lake Charles, LA
Area: Whole counties

Counties Allen Parish, LA, Beauregard Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 8.1 hours before the alert went out and 60 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

Local storm report, Apr 29, 12:06 AM CDT, 2 hours 59 minutes before

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Special weather statement, Apr 29, 12:32 AM CDT, 2 hours 33 minutes before

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Special weather statement, Apr 29, 12:47 AM CDT, 2 hours 18 minutes before

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Local storm report, Apr 29, 1:56 AM CDT, 1 hour 9 minutes before

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Special weather statement, Apr 29, 2:07 AM CDT, 58 minutes before

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Special weather statement, Apr 29, 2:50 AM CDT, 15 minutes before

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The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 28, 7:02 PM CDT	Tornado Warning	LCH	Calcasieu	28 min
Apr 28, 9:43 PM CDT	Severe Thunderstorm Warning	LCH	Allen	32 min
Apr 28, 10:09 PM CDT	Severe Thunderstorm Warning	LCH	Grant, Rapides	66 min
Apr 29, 1:01 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline	59 min
Apr 29, 4:03 AM CDT	Flash Flood Warning	LCH	Grant, LaSalle, Rapides	3 hr

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.