Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 99, NWS Lake Charles, LA

August 28, 2017Cameron Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Aug 28, 2017, 7:47 PM CDT for Cameron Parish, Louisiana. It was in force for 43 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: Aug 28, 2017, 7:47 PM CDT (00:47 UTC)
Expired: Aug 28, 2017, 8:30 PM CDT
In force: 43 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Cameron Parish, LA

The radar

The Lake Charles radar (KLCH), 71 km from the middle of the area, began a volume at 00:49 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
Aug 28, 12:16 PM CDT	Tornado Watch	SPC	12 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.8 hours before the alert went out and 70 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: 71 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 487 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 250 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

132 
WFUS54 KLCH 290047
TORLCH
LAC023-290130-
/O.NEW.KLCH.TO.W.0099.170829T0047Z-170829T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
747 PM CDT MON AUG 28 2017

The National Weather Service in Lake Charles has issued a

* Tornado Warning for...
  Southeastern Cameron Parish in southwestern Louisiana...

* Until 830 PM CDT
    
* At 747 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Rockefeller Wildlife Range, moving northwest at 20
  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...
  Rockefeller Wildlife Range around 805 PM CDT. 

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 2959 9267 2964 9280 2974 9288 2981 9271
      2960 9264 2960 9265
TIME...MOT...LOC 0047Z 154DEG 16KT 2961 9272 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Rua

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:19 PM CDT	Special Marine Warning	LCH		41 min
Aug 28, 7:44 PM CDT	Special Marine Warning	LCH		46 min
Aug 28, 8:29 PM CDT	Special Marine Warning	LCH		46 min
Aug 28, 10:00 PM CDT	Special Marine Warning	LCH		60 min
Aug 29, 2:02 AM CDT	Flash Flood Warning	LCH	Calcasieu, Cameron, Jefferson Davis	9 hr
Aug 29, 1:05 PM CDT	Flash Flood Warning	LCH	Calcasieu, Cameron	6 hr
Aug 29, 1:46 PM CDT	Special Marine Warning	LCH		14 min
Aug 29, 4:20 PM CDT	Tornado Warning	LCH	Acadia	25 min
Aug 29, 4:33 PM CDT	Storm Surge Warning	LCH	Cameron	27 hr
Aug 29, 4:44 PM CDT	Tornado Warning	LCH	Acadia	31 min
Aug 29, 5:00 PM CDT	Small Craft Advisory	LCH		50 hr
Aug 29, 5:14 PM CDT	Tornado Warning	LCH	Acadia, Jefferson Davis	31 min
Aug 29, 5:38 PM CDT	Tornado Warning	LCH	Acadia, Lafayette	37 min
Aug 29, 5:45 PM CDT	Tornado Warning	LCH	Allen, Jefferson Davis	30 min
Aug 29, 5:53 PM CDT	Tornado Warning	LCH	Allen, Jefferson Davis	37 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.