Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 3, NWS Lake Charles, LA

January 18, 2017Vernon Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Jan 18, 2017, 4:43 PM CST for Vernon Parish, Louisiana. It was in force for 17 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: Jan 18, 2017, 4:43 PM CST (22:43 UTC)
Expired: Jan 18, 2017, 5:00 PM CST
In force: 17 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Vernon Parish, LA

The radar

The Ft Polk radar (KPOE), 26 km from the middle of the area, began a volume at 22:42 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, 10.7 hours before the alert went out and 134 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: 729 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

878 
WFUS54 KLCH 182243
TORLCH
LAC115-182300-
/O.NEW.KLCH.TO.W.0003.170118T2243Z-170118T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
443 PM CST WED JAN 18 2017

The National Weather Service in Lake Charles has issued a

* Tornado Warning for...
  Northeastern Vernon Parish in west central Louisiana...

* Until 500 PM CST
    
* At 442 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Anacoco, moving east at 30 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Kurthwood and Hutton around 500 PM CST. 

Other locations impacted by this tornadic thunderstorm include
Simpson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3136 9303 3121 9299 3122 9334 3136 9339
      3137 9337 3137 9303
TIME...MOT...LOC 2242Z 259DEG 25KT 3129 9329 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

24

1 follow-up statement

181 
WWUS54 KLCH 182256
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
456 PM CST WED JAN 18 2017

LAC115-182306-
/O.EXP.KLCH.TO.W.0003.000000T0000Z-170118T2300Z/
Vernon LA-
456 PM CST WED JAN 18 2017

...THE TORNADO WARNING FOR NORTHEASTERN VERNON PARISH WILL EXPIRE AT
500 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

LAT...LON 3136 9303 3121 9299 3122 9334 3136 9339
      3137 9337 3137 9303
TIME...MOT...LOC 2256Z 252DEG 28KT 3132 9319 

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 18, 1:33 AM CST	Marine Dense Fog Advisory	LCH		9 hr
Jan 18, 2:54 PM CST	Marine Dense Fog Advisory	LCH		18 hr
Jan 18, 3:02 PM CST	Tornado Warning	LCH	Vernon	28 min

Nearby

Tornado Warnings in Louisiana, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.