Alert archive / Louisiana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 85, NWS Lake Charles, LA

July 18, 20134 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 18, 2013, 5:20 PM CDT for 4 parishes in Louisiana. It was in force for 55 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
Jul 18, 2013, 5:20 PM CDT (22:20 UTC)
Expired
Jul 18, 2013, 6:15 PM CDT
In force
55 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon

Counties Allen Parish, LA, Avoyelles Parish, LA, Evangeline Parish, LA, Rapides Parish, LA

The radar

The Ft Polk radar (KPOE), 57 km from the middle of the area, began a volume at 22:21 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, 10.3 hours before the alert went out and 273 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 2013-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1499 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 2013-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.193958Sfc1 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
1499 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1034 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
23 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
Jul 17, 7:08 PM CDTSpecial Weather StatementLCHAvoyelles37 min
Jul 17, 7:24 PM CDTSpecial Weather StatementLCHAvoyelles36 min
Jul 17, 7:46 PM CDTSpecial Weather StatementLCHAvoyelles29 min
Jul 17, 8:17 PM CDTSpecial Weather StatementLCHAvoyelles28 min
Jul 18, 1:17 PM CDTSpecial Weather StatementLCHLafayette43 min
Jul 18, 1:19 PM CDTSpecial Marine WarningLCH56 min
Jul 18, 4:15 PM CDTSpecial Weather StatementLCHAllen45 min
Jul 18, 4:49 PM CDTSpecial Weather StatementLCHCalcasieu26 min
Jul 18, 5:12 PM CDTSpecial Weather StatementLCHRapides33 min
Jul 18, 5:31 PM CDTSpecial Weather StatementLCHBeauregard44 min
Jul 18, 5:39 PM CDTSevere Thunderstorm WarningLCHBeauregard, Vernon36 min
Jul 18, 6:21 PM CDTSpecial Weather StatementLCHAllen, Evangeline39 min
Jul 18, 6:24 PM CDTSpecial Weather StatementLCHBeauregard66 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.