Alert archive / Louisiana / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 112, NWS Lake Charles, LA

November 27, 2020Saint Landry Parish, Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Nov 27, 2020, 3:23 PM CST for Saint Landry Parish, Saint Martin Parish, Louisiana. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 27, 2020, 3:23 PM CST (21:23 UTC)
Expired: Nov 27, 2020, 4:00 PM CST
In force: 37 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Saint Landry Parish, LA, Saint Martin Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.4 hours before the alert went out and 137 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: 1629 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 535 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.9

Open this sounding in Storm Lab

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.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Nov 27, 12:01 PM CST, 3 hours 22 minutes earlier.

Area forecast discussion, Nov 27, 12:01 PM CST, 3 hours 22 minutes before

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Hazardous weather outlook, Nov 27, 3:05 PM CST, 18 minutes before

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In the hours before

Special weather statement, Nov 27, 1:29 PM CST, 1 hour 54 minutes before

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Special weather statement, Nov 27, 3:09 PM CST, 14 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
Nov 27, 3:56 AM CST	Marine Dense Fog Advisory	LCH		4 hr
Nov 27, 11:39 AM CST	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis	51 min
Nov 27, 11:54 AM CST	Tornado Warning	LCH	Allen, Calcasieu, Jefferson Davis	36 min
Nov 27, 12:37 PM CST	Areal Flood Advisory	LCH	Avoyelles, Rapides	113 min
Nov 27, 1:29 PM CST	Special Weather Statement	LCH	Acadia	46 min
Nov 27, 2:11 PM CST	Areal Flood Advisory	LCH	Acadia, Allen, Beauregard, Calcasieu, Evangeline, Jefferson Davis and 2 more	2 hr
Nov 27, 3:09 PM CST	Special Weather Statement	LCH	Lafayette, Saint Martin	51 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2020 Every severe thunderstorm warning in 2020

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.