Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 17, NWS Lake Charles, LA

February 7, 2017Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Feb 7, 2017, 9:29 AM CST for Avoyelles Parish, Louisiana. It was in force for 31 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: Feb 7, 2017, 9:29 AM CST (15:29 UTC)
Expired: Feb 7, 2017, 10:00 AM CST
In force: 31 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 111 km from the middle of the area, began a volume at 15:29 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 watch it was issued in

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

Issued	Product	Office	Lasted
Feb 7, 7:54 AM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.5 hours before the alert went out and 161 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: 1751 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 8.9

Open this sounding in Storm Lab

The text

As transmitted.

414 
WFUS54 KLCH 071529
TORLCH
LAC009-071600-
/O.NEW.KLCH.TO.W.0017.170207T1529Z-170207T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
929 AM CST TUE FEB 7 2017

The National Weather Service in Lake Charles has issued a

* Tornado Warning for...
  Southeastern Avoyelles Parish in central Louisiana...

* Until 1000 AM CST
    
* At 928 AM CST, a severe thunderstorm capable of producing a tornado
  was located over Goudeau, or near Morrow, moving northeast 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. 

* Locations impacted include...
  Simmesport, Dupont and Goudeau. 

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 3108 9171 3104 9173 3099 9178 3098 9180
      3087 9180 3085 9187 3085 9204 3088 9206
TIME...MOT...LOC 1528Z 240DEG 26KT 3089 9201 

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

$$

Jones

1 follow-up statement

878 
WWUS54 KLCH 071544
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
944 AM CST TUE FEB 7 2017

LAC009-071600-
/O.CON.KLCH.TO.W.0017.000000T0000Z-170207T1600Z/
Avoyelles LA-
944 AM CST TUE FEB 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 AM CST FOR
SOUTHEASTERN AVOYELLES PARISH...
    
At 943 AM CST, a severe thunderstorm capable of producing a tornado
was located near Dupont, or near Simmesport, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
southeastern Avoyelles Parish.

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 3098 9180 3087 9180 3085 9187 3085 9193
      3091 9194
TIME...MOT...LOC 1543Z 240DEG 26KT 3095 9189 

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

$$

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 7, 6:10 AM CST	Tornado Warning	LCH	Allen, Evangeline, Rapides	24 min
Feb 7, 1:49 PM CST	Marine Dense Fog Advisory	LCH		28 hr

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.