Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 45, NWS Lake Charles, LA

May 30, 2017Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at May 30, 2017, 8:27 AM CDT for Vermilion Parish, Louisiana. It was in force for 18 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 30, 2017, 8:27 AM CDT (13:27 UTC)
Expired: May 30, 2017, 8:45 AM CDT
In force: 18 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 111 km from the middle of the area, began a volume at 13:29 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 nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.5 hours before the alert went out and 109 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: 324 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

270 
WFUS54 KLCH 301327
TORLCH
LAC113-301345-
/O.NEW.KLCH.TO.W.0045.170530T1327Z-170530T1345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
827 AM CDT TUE MAY 30 2017

The National Weather Service in Lake Charles has issued a

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

* Until 845 AM CDT
    
* At 826 AM CDT, a severe thunderstorm capable of producing a tornado
  was located near Freshwater City, moving northeast 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...
  Intracoastal City around 845 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or 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 2958 9231 2986 9228 2977 9206 2972 9214
      2972 9215 2974 9214 2975 9213 2976 9213
      2977 9215 2975 9215 2976 9218 2975 9216
      2974 9217 2975 9221 2971 9218 2970 9210
      2967 9213 2962 9211 2958 9215 2955 9223
TIME...MOT...LOC 1326Z 202DEG 19KT 2963 9223 

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

$$

Tingler

1 follow-up statement

494 
WWUS54 KLCH 301345
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
845 AM CDT TUE MAY 30 2017

LAC113-301355-
/O.EXP.KLCH.TO.W.0045.000000T0000Z-170530T1345Z/
Vermilion LA-
845 AM CDT TUE MAY 30 2017

...THE TORNADO WARNING FOR SOUTHEASTERN VERMILION PARISH HAS
EXPIRED...
    
The tornadic thunderstorm which prompted the warning has !**
weakened. Therefore, the warning has been allowed to expire.

LAT...LON 2958 9231 2986 9228 2977 9206 2972 9214
      2972 9215 2974 9214 2975 9213 2976 9213
      2977 9215 2975 9215 2976 9218 2975 9216
      2974 9217 2975 9221 2971 9218 2970 9210
      2967 9213 2962 9211 2958 9215 2955 9223
TIME...MOT...LOC 1345Z 202DEG 19KT 2972 9219 

$$

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 7:42 AM CDT	Special Marine Warning	LCH		93 min
May 30, 8:02 AM CDT	Special Weather Statement	LCH	Vermilion	43 min
May 30, 8:38 AM CDT	Flash Flood Warning	LCH	Iberia, St. Mary	2 hr
May 30, 9:02 AM CDT	Special Marine Warning	LCH		88 min
May 30, 9:11 AM CDT	Special Marine Warning	LCH		2 hr
May 30, 9:45 AM CDT	Areal Flood Advisory	LCH	Iberia, St. Mary, Vermilion	2 hr
May 30, 10:37 AM CDT	Flash Flood Warning	LCH	Iberia, St. Mary	3 hr
May 30, 10:40 AM CDT	Areal Flood Advisory	LCH	Iberia, Lafayette, Saint Martin	2 hr
May 30, 10:44 AM CDT	Areal Flood Advisory	LCH	Iberia, Saint Martin, St. Mary	2 hr
May 30, 11:05 AM CDT	Special Marine Warning	LCH		115 min
May 30, 1:15 PM CDT	Special Marine Warning	LCH		2 hr
May 30, 1:31 PM CDT	Flash Flood Warning	LCH	Iberia, Saint Martin, St. Mary	3 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.