Alert archive / Louisiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 45, NWS Lake Charles, LA

May 22, 2012Cameron Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 22, 2012, 5:30 PM CDT for Cameron Parish, Louisiana. It was in force for 20 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: May 22, 2012, 5:30 PM CDT (22:30 UTC)
Expired: May 22, 2012, 5:50 PM CDT
In force: 20 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

County Cameron Parish, LA

The radar

The Lake Charles radar (KLCH), 44 km from the middle of the area, began a volume at 22:34 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.5 hours before the alert went out and 43 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: 1427 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1220 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

599 
WUUS54 KLCH 222230
SVRLCH
LAC023-222315-
/O.NEW.KLCH.SV.W.0045.120522T2230Z-120522T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
530 PM CDT TUE MAY 22 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CAMERON PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES GRAND CHENIER...

* UNTIL 615 PM CDT

* AT 531 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH...OVER GRAND CHENIER...MOVING
  SOUTHWEST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL CENTRAL CAMERON PARISH AT 550 PM CDT
  RURAL SOUTHERN CAMERON PARISH AT 600 PM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN. STAY INDOORS...
AWAY FROM WINDOWS.

&&

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE AT
337-477-5285 EXTENSION 1.

LAT...LON 2970 9297 2974 9304 2976 9311 2989 9310
      2982 9295
TIME...MOT...LOC 2231Z 031DEG 2KT 2978 9305

$$

24

1 follow-up statement

743 
WWUS54 KLCH 222250
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
550 PM CDT TUE MAY 22 2012

LAC023-222259-
/O.CAN.KLCH.SV.W.0045.000000T0000Z-120522T2315Z/
CAMERON LA-
550 PM CDT TUE MAY 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CAMERON PARISH IS
CANCELLED...

THE CLUSTER OF THUNDERSTORMS BETWEEN CREOLE AND GRAND CHENIER HAVE 
WEAKENED.

LAT...LON 2970 9297 2974 9304 2976 9311 2989 9310
      2982 9295
TIME...MOT...LOC 2249Z 031DEG 2KT 2977 9306

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 8:05 PM CDT	Special Weather Statement	LCH	Vermilion	55 min
May 21, 8:14 PM CDT	Special Weather Statement	LCH	Saint Landry	61 min
May 22, 11:26 AM CDT	Special Marine Warning	LCH		49 min
May 22, 4:01 PM CDT	Severe Thunderstorm Warning	LCH	St. Mary	59 min
May 22, 4:42 PM CDT	Special Weather Statement	LCH	Cameron	33 min
May 22, 4:47 PM CDT	Severe Thunderstorm Warning	LCH	Cameron	43 min
May 22, 5:08 PM CDT	Severe Thunderstorm Warning	LCH	Cameron	40 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2012 Every severe thunderstorm warning in 2012

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.