Alert archive / Louisiana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 82, NWS Lake Charles, LA

June 29, 2013Avoyelles Parish, Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jun 29, 2013, 3:50 PM CDT for Avoyelles Parish, Saint Landry Parish, Louisiana. It was in force for 25 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
Jun 29, 2013, 3:50 PM CDT (20:50 UTC)
Expired
Jun 29, 2013, 4:15 PM CDT
In force
25 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon

Counties Avoyelles Parish, LA, Saint Landry Parish, LA

The radar

The Ft Polk radar (KPOE), 99 km from the middle of the area, began a volume at 20:52 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, 8.8 hours before the alert went out and 230 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2013-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 924 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2013-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
924 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
766 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
-6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 6:32 AM CDTSpecial Weather StatementLCHSaint Martin, St. Mary58 min
Jun 29, 7:26 AM CDTSpecial Weather StatementLCHSt. Mary64 min
Jun 29, 7:45 AM CDTSpecial Marine WarningLCH60 min
Jun 29, 8:28 AM CDTSpecial Weather StatementLCHSt. Mary62 min
Jun 29, 9:11 AM CDTSpecial Marine WarningLCH64 min
Jun 29, 9:28 AM CDTSpecial Weather StatementLCHSt. Mary32 min
Jun 29, 10:01 AM CDTSpecial Marine WarningLCH59 min
Jun 29, 10:22 AM CDTSpecial Marine WarningLCH68 min
Jun 29, 11:27 AM CDTSpecial Marine WarningLCH63 min
Jun 29, 12:27 PM CDTSpecial Marine WarningLCH63 min
Jun 29, 3:17 PM CDTSevere Thunderstorm WarningLCHSaint Landry28 min
Jun 29, 3:36 PM CDTSevere Thunderstorm WarningLCHSaint Landry24 min
Jun 29, 4:18 PM CDTSpecial Weather StatementLCHSaint Landry42 min
Jun 29, 5:40 PM CDTSpecial Weather StatementLCHLafayette50 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2013Every severe thunderstorm warning in 2013

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.