Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 70, NWS Lake Charles, LA

August 27, 2017Iberia Parish, Saint Martin Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Aug 27, 2017, 2:40 PM CDT for Iberia Parish, Saint Martin Parish, Louisiana. It was in force for 20 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 27, 2017, 2:40 PM CDT (19:40 UTC)
Expired
Aug 27, 2017, 3:00 PM CDT
In force
20 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Iberia Parish, LA, Saint Martin Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.7 hours before the alert went out and 141 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 2017-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 323 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2017-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 181 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
323 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
934 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
181 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

541 
WFUS54 KLCH 271940
TORLCH
LAC045-099-272015-
/O.NEW.KLCH.TO.W.0070.170827T1940Z-170827T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
240 PM CDT SUN AUG 27 2017

The National Weather Service in Lake Charles has issued a

* Tornado Warning for...
  North central Iberia Parish in south central Louisiana...
  West central St. Martin Parish in south central Louisiana...

* Until 315 PM CDT
    
* At 239 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Loreauville, or near New Iberia, moving north at
  15 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...
  Lafayette and Loreauville around 245 PM CDT. 
  St. Martinville around 305 PM 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 2995 9169 2995 9181 3019 9186 3019 9161
TIME...MOT...LOC 1939Z 183DEG 14KT 3004 9173 

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

$$

24
1 follow-up statement
491 
WWUS54 KLCH 272000
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
300 PM CDT SUN AUG 27 2017

LAC045-099-272010-
/O.CAN.KLCH.TO.W.0070.000000T0000Z-170827T2015Z/
Iberia LA-St. Martin LA-
300 PM CDT SUN AUG 27 2017

...THE TORNADO WARNING FOR NORTH CENTRAL IBERIA AND WEST CENTRAL ST.
MARTIN PARISHES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 2995 9169 2995 9181 3019 9186 3019 9161
TIME...MOT...LOC 1958Z 183DEG 14KT 3012 9172 

$$

24

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 7:43 PM CDTTornado WarningLCHCameron32 min
Aug 26, 10:53 PM CDTSpecial Marine WarningLCH37 min
Aug 27, 8:59 AM CDTSpecial Marine WarningLCH61 min
Aug 27, 9:16 AM CDTSpecial Marine WarningLCH29 min
Aug 27, 9:24 AM CDTSpecial Marine WarningLCH36 min
Aug 27, 9:55 AM CDTFlash Flood WarningLCHCalcasieu, Cameron5 hr
Aug 27, 9:57 AM CDTRiver Flood WarningLCHAcadia, Jefferson Davis, Vermilion14 days
Aug 27, 10:00 AM CDTSpecial Marine WarningLCH60 min
Aug 27, 10:55 AM CDTSpecial Marine WarningLCH65 min
Aug 27, 11:10 AM CDTSpecial Weather StatementLCHCameron, Vermilion65 min
Aug 27, 11:52 AM CDTFlash Flood WarningLCHCalcasieu, Jefferson Davis4 hr
Aug 27, 11:55 AM CDTSpecial Marine WarningLCH65 min
Aug 27, 12:20 PM CDTSpecial Weather StatementLCHBeauregard, Jefferson Davis55 min
Aug 27, 12:31 PM CDTSpecial Marine WarningLCH29 min
Aug 27, 12:59 PM CDTSpecial Marine WarningLCH61 min
Aug 27, 1:02 PM CDTTornado WarningLCHLafayette, Vermilion28 min
Aug 27, 1:12 PM CDTSpecial Weather StatementLCHAllen, Beauregard63 min
Aug 27, 1:27 PM CDTTornado WarningLCHLafayette, Vermilion33 min
Aug 27, 1:55 PM CDTTornado WarningLCHLafayette, Vermilion35 min
Aug 27, 1:58 PM CDTSpecial Marine WarningLCH62 min
Aug 27, 2:00 PM CDTSpecial Marine WarningLCH60 min
Aug 27, 2:10 PM CDTTornado WarningLCHIberia35 min
Aug 27, 2:27 PM CDTTornado WarningLCHLafayette, Vermilion21 min
Aug 27, 2:40 PM CDTFlash Flood WarningLCHAllen, Beauregard, Calcasieu, Cameron, Jefferson Davis5 hr
Aug 27, 2:50 PM CDTAreal Flood AdvisoryLCHAcadia, Iberia, Lafayette, Saint Landry, Saint Martin, Vermilion4 hr
Aug 27, 3:02 PM CDTSpecial Weather StatementLCHSaint Martin43 min
Aug 27, 3:21 PM CDTSpecial Marine WarningLCH24 min
Aug 27, 3:22 PM CDTSpecial Marine WarningLCH23 min
Aug 27, 3:41 PM CDTSpecial Marine WarningLCH34 min
Aug 27, 4:14 PM CDTSpecial Marine WarningLCH31 min
Aug 27, 4:29 PM CDTSpecial Marine WarningLCH61 min
Aug 27, 4:30 PM CDTTornado Warning Tornado observedLCHCameron30 min
Aug 27, 4:34 PM CDTSpecial Marine WarningLCH56 min
Aug 27, 4:47 PM CDTSpecial Marine WarningLCH58 min
Aug 27, 5:15 PM CDTSpecial Marine WarningLCH60 min
Aug 27, 5:33 PM CDTSpecial Marine WarningLCH57 min
Aug 27, 6:13 PM CDTSpecial Marine WarningLCH62 min
Aug 27, 6:29 PM CDTSpecial Marine WarningLCH61 min

Nearby

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