Alert archive / Louisiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 192, NWS Lake Charles, LA

December 15, 2009Beauregard Parish, Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Dec 15, 2009, 9:04 AM CST for Beauregard Parish, Calcasieu Parish, Louisiana. It was in force for 41 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: Dec 15, 2009, 9:04 AM CST (15:04 UTC)
Expired: Dec 15, 2009, 9:45 AM CST
In force: 41 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Beauregard Parish, LA, Calcasieu Parish, LA

The radar

The Lake Charles radar (KLCH), 37 km from the middle of the area, began a volume at 15:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.1 hours before the alert went out and 351 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: 333 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Dec 15, 6:47 AM CST, 2 hours 17 minutes earlier.

Area forecast discussion, Dec 15, 6:47 AM CST, 2 hours 17 minutes before

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Hazardous weather outlook, Dec 15, 6:30 AM CST, 2 hours 34 minutes before

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In the hours before

Local storm report, Dec 15, 4:45 AM CST, 4 hours 19 minutes before

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Local storm report, Dec 15, 8:45 AM CST, 19 minutes before

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Special weather statement, Dec 15, 8:45 AM CST, 19 minutes before

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Local storm report, Dec 15, 9:00 AM CST, 4 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
Dec 14, 9:14 PM CST	Marine Dense Fog Advisory	LCH		12 hr
Dec 14, 9:35 PM CST	Dense Fog Advisory	LCH		8 hr
Dec 14, 10:19 PM CST	Flash Flood Warning	LCH	Iberia, Lafayette, Saint Landry, Saint Martin, St. Mary, Vermilion	6 hr
Dec 15, 1:38 AM CST	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	25 min
Dec 15, 2:07 AM CST	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	23 min
Dec 15, 2:30 AM CST	Severe Thunderstorm Warning	LCH	Saint Martin, St. Mary	35 min
Dec 15, 2:43 AM CST	Flash Flood Warning	LCH	Rapides, Vernon	4 hr
Dec 15, 4:32 AM CST	Flash Flood Warning	LCH	Cameron, Iberia, Saint Martin, St. Mary, Vermilion	6 hr
Dec 15, 9:29 AM CST	River Flood Warning	LCH	Calcasieu	71 hr
Dec 15, 9:29 AM CST	River Flood Warning	LCH	Acadia, Jefferson Davis	7 days
Dec 15, 9:29 AM CST	River Flood Warning	LCH	Lafayette, Vermilion	32 hr
Dec 15, 9:29 AM CST	River Flood Warning	LCH	Vernon	35 hr
Dec 15, 10:11 AM CST	Areal Flood Warning	LCH	Iberia, Lafayette, Saint Martin, St. Mary	12 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2009 Every severe thunderstorm warning in 2009

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; radar from the NEXRAD Level II archive.