Alert archive / Louisiana / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 45, NWS New Orleans, LA

April 20, 1992Saint Martin Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 20, 1992, 3:03 AM CDT for Saint Martin Parish, Louisiana. It was in force for 57 min.

The area

The counties it named.

The facts

Issued: Apr 20, 1992, 3:03 AM CDT (08:03 UTC)
Expired: Apr 20, 1992, 4:00 AM CDT
In force: 57 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Saint Martin Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 8.1 hours before the alert went out and 153 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: 1436 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.3

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 20, 12:38 AM CDT, 2 hours 25 minutes before

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Special weather statement, Apr 20, 1:01 AM CDT, 2 hours 2 minutes before

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Special weather statement, Apr 20, 1:30 AM CDT, 1 hour 33 minutes before

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Special weather statement, Apr 20, 2:02 AM CDT, 1 hour 1 minute before

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Special weather statement, Apr 20, 2:39 AM CDT, 24 minutes before

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Special weather statement, Apr 20, 2:57 AM CDT, 6 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 20, 3:36 AM CDT	Severe Thunderstorm Warning	LIX	Saint Landry	69 min
Apr 20, 4:15 AM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee	45 min
Apr 20, 4:31 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	59 min
Apr 20, 7:10 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche	65 min
Apr 20, 7:32 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	73 min
Apr 20, 7:52 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	38 min
Apr 20, 8:19 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	41 min
Apr 20, 10:08 AM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	67 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1992 Every severe thunderstorm warning in 1992

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.