Alert archive / Louisiana / Special Weather Statements in 2016

Special Weather Statement, NWS Lake Charles, LA

July 21, 2016Allen Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jul 21, 2016, 3:34 PM CDT for Allen 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 outline as issued.

The facts

Issued
Jul 21, 2016, 3:34 PM CDT (20:34 UTC)
Expired
Jul 21, 2016, 4:15 PM CDT
In force
41 min
Issued by
NWS Lake Charles, LA

County Allen Parish, LA

The radar

The Ft Polk radar (KPOE), 36 km from the middle of the area, began a volume at 20:35 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

Jackson, MS (KJAN), launched 12:00Z, 8.6 hours before the alert went out and 325 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, Jackson, MS at 12:00Z on 2016-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1178 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, Jackson, MS at 12:00Z on 2016-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 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
1178 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 2:26 PM CDTSpecial Weather StatementLCHRapides64 min
Jul 21, 2:31 PM CDTSpecial Weather StatementLCHAcadia29 min
Jul 21, 3:02 PM CDTSpecial Weather StatementLCHAvoyelles43 min
Jul 21, 3:08 PM CDTSpecial Weather StatementLCHSaint Martin52 min
Jul 21, 3:18 PM CDTSpecial Weather StatementLCHVermilion42 min
Jul 21, 3:46 PM CDTSpecial Weather StatementLCHCameron44 min
Jul 21, 4:14 PM CDTSpecial Weather StatementLCHLafayette46 min
Jul 21, 4:39 PM CDTSpecial Weather StatementLCHCameron51 min
Jul 21, 4:54 PM CDTSpecial Weather StatementLCHAcadia51 min
Jul 21, 5:07 PM CDTSpecial Weather StatementLCHEvangeline68 min

Nearby

Special Weather Statements in Louisiana, 2016Every special weather statement in 2016

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.