Alert archive / Louisiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Lake Charles, LA

February 18, 20126 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Feb 18, 2012, 8:30 AM CST for 6 parishes in Louisiana. It was in force for 60 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 18, 2012, 8:30 AM CST (14:30 UTC)
Expired: Feb 18, 2012, 9:30 AM CST
In force: 60 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

Counties Acadia Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 74 km from the middle of the area, began a volume at 14:32 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.

What was reported inside it

Time	Report	Where	Remark
Feb 18, 8:53 AM CST	TORNADO 0	1 Sw Klondike, LA	A WEAK TORNADO TOUCHED DOWN ALONG HIGHWAY 14 AND 717 NEAR KLONDIKE...RIPPED PART OF A METAL ROOF OFF A BARN...SNAPPED A COUPLE OF TELEPHONE POLES AND TREES. THIS TORNADO WAS ON THE GROUND FOR 2.5 MILES AND WAS 20 YARDS WIDE. IT MOVED INTO VERMILION PARISH ALON
Feb 18, 9:00 AM CST	TSTM WND DMG	Jennings, LA	A TREE WAS BLOWN ONTO A HOUSE ON SHANNON DRIVE AND POWER LINES WERE DOWNED.
Feb 18, 9:10 AM CST	TSTM WND DMG	Lyons Point, LA	POWER POLES WERE BLOWN DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 18, 4:46 AM CST	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.5 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 564 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 359 m²/s²
0-3 km storm-relative helicity: 635 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

891 
WUUS54 KLCH 181430
SVRLCH
LAC001-019-023-053-055-113-181530-
/O.NEW.KLCH.SV.W.0021.120218T1430Z-120218T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
830 AM CST SAT FEB 18 2012

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL LAFAYETTE PARISH IN SOUTH CENTRAL LOUISIANA...
  SOUTHERN ACADIA PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...MERMENTAU...CROWLEY...
  SOUTHEASTERN CALCASIEU PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...IOWA...HAYES...
  EASTERN CAMERON PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...LACASSINE NATIONAL WILDLIFE REFUGE...KLONDIKE...
  SOUTHERN JEFFERSON DAVIS PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...WELSH...LAKE ARTHUR...JENNINGS...
  VERMILION PARISH IN SOUTHWEST LOUISIANA...
  THIS INCLUDES...PECAN ISLAND...KAPLAN...GUEYDAN...FRESHWATER
  CITY...FORKED ISLAND...

* UNTIL 930 AM CST

* AT 831 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH...FROM 7 MILES NORTHWEST OF WELSH TO 14 MILES
  SOUTHWEST OF LACASSINE NATIONAL WILDLIFE REFUGE...MOVING EAST AT 40
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  THORNWELL AND LOWRY BY 840 AM CST...
  LAKE ARTHUR AND JENNINGS BY 850 AM CST...
  KLONDIKE BY 855 AM CST...
  MERMENTAU BY 900 AM CST...
  EGAN...RICEVILLE...MORSE AND GUEYDAN BY 905 AM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 AM CST
SATURDAY MORNING FOR SOUTHWEST LOUISIANA AND SOUTHEAST TEXAS.

&&

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

LAT...LON 2986 9322 3033 9306 3018 9218 2974 9218
      2973 9219 2972 9218 2956 9218 2953 9227
TIME...MOT...LOC 1431Z 281DEG 34KT 3027 9288 3000 9290
          2982 9303

$$

21

1 follow-up statement

672 
WWUS54 KLCH 181506
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
906 AM CST SAT FEB 18 2012

LAC001-019-053-055-181516-
/O.CAN.KLCH.SV.W.0021.000000T0000Z-120218T1530Z/
LAFAYETTE LA-ACADIA LA-CALCASIEU LA-JEFFERSON DAVIS LA-
906 AM CST SAT FEB 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN JEFFERSON DAVIS...
SOUTHEASTERN CALCASIEU...SOUTHERN ACADIA AND WEST CENTRAL LAFAYETTE
PARISHES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 AM CST
SATURDAY MORNING FOR SOUTHWEST LOUISIANA.

LAT...LON 2955 9233 2977 9295 3002 9274 2990 9218
      2989 9218
TIME...MOT...LOC 1506Z 330DEG 24KT 2993 9250 2964 9285

$$

LAC023-113-181530-
/O.CON.KLCH.SV.W.0021.000000T0000Z-120218T1530Z/
VERMILION LA-CAMERON LA-
906 AM CST SAT FEB 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM CST
FOR EASTERN CAMERON AND SOUTHWESTERN VERMILION PARISHES...

AT 901 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF SEVERE THUNDERSTORMS ON RADAR CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM FLORENCE LANDING TO 25 MILES WEST OF PECAN
ISLAND..MOVING SOUTHEAST AT 30 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  PECAN ISLAND AND 7 MILES SOUTHWEST OF FORKED ISLAND BY 930 AM
  CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 AM CST
SATURDAY MORNING FOR SOUTHWEST LOUISIANA.

&&

LAT...LON 2955 9233 2977 9295 3002 9274 2990 9218
      2989 9218
TIME...MOT...LOC 1506Z 330DEG 24KT 2993 9250 2964 9285

$$

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 18, 5:08 AM CST	Special Weather Statement	LCH	Allen	37 min
Feb 18, 5:33 AM CST	Special Weather Statement	LCH	Evangeline	27 min
Feb 18, 6:26 AM CST	Special Weather Statement	LCH	Vernon	34 min
Feb 18, 6:54 AM CST	Special Weather Statement	LCH	Saint Landry	66 min
Feb 18, 7:14 AM CST	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Cameron	61 min
Feb 18, 7:21 AM CST	Areal Flood Advisory	LCH	Beauregard, Vernon	84 min
Feb 18, 7:23 AM CST	Special Marine Warning	LCH		67 min
Feb 18, 7:27 AM CST	Areal Flood Advisory	LCH	Calcasieu, Cameron	93 min
Feb 18, 7:58 AM CST	Severe Thunderstorm Warning	LCH	Acadia, Beauregard, Calcasieu, Cameron, Jefferson Davis, Vermilion	62 min
Feb 18, 8:01 AM CST	Tornado Warning	LCH	Cameron	29 min
Feb 18, 8:07 AM CST	Special Marine Warning	LCH		53 min
Feb 18, 8:12 AM CST	Flash Flood Warning	LCH	Calcasieu	3 hr
Feb 18, 8:37 AM CST	Tornado Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	23 min
Feb 18, 8:38 AM CST	Areal Flood Advisory	LCH	Acadia, Calcasieu, Jefferson Davis, Lafayette, Saint Landry, Saint Martin and 1 more	4 hr
Feb 18, 8:51 AM CST	Tornado Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	24 min
Feb 18, 9:00 AM CST	Special Marine Warning	LCH		60 min
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Calcasieu	7 days
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis	5 days
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Vernon	3 days
Feb 18, 9:02 AM CST	River Flood Warning	LCH	Beauregard, Calcasieu	13 hr
Feb 18, 9:09 AM CST	Tornado Warning	LCH	Acadia, Lafayette, Vermilion	36 min
Feb 18, 9:19 AM CST	Severe Thunderstorm Warning	LCH	Vermilion	56 min
Feb 18, 9:22 AM CST	Tornado Warning	LCH	Acadia, Lafayette	38 min
Feb 18, 9:33 AM CST	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	57 min
Feb 18, 9:34 AM CST	Tornado Warning	LCH	Acadia, Lafayette, Vermilion	28 min
Feb 18, 9:41 AM CST	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Martin, Vermilion	64 min
Feb 18, 9:46 AM CST	Tornado Warning	LCH	Saint Landry, Saint Martin	29 min
Feb 18, 9:54 AM CST	Special Marine Warning	LCH		66 min
Feb 18, 10:09 AM CST	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Martin, St. Mary, Vermilion	66 min
Feb 18, 10:17 AM CST	Special Marine Warning	LCH		58 min
Feb 18, 10:20 AM CST	Areal Flood Warning	LCH	Acadia, Calcasieu, Cameron, Jefferson Davis, Lafayette, Saint Landry and 2 more	6 hr
Feb 18, 10:46 AM CST	Areal Flood Warning	LCH	Acadia, Allen, Avoyelles, Evangeline, Jefferson Davis, Saint Landry	3 hr
Feb 18, 10:54 AM CST	River Flood Warning	LCH	Lafayette, Vermilion	34 hr
Feb 18, 10:54 AM CST	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	50 min
Feb 18, 11:01 AM CST	Special Marine Warning	LCH		43 min
Feb 18, 11:16 AM CST	Areal Flood Warning	LCH	Beauregard, Calcasieu	4 hr
Feb 18, 3:41 PM CST	Areal Flood Advisory	LCH	Iberia, Saint Martin, Vermilion	109 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.