Alert archive / Louisiana / Tornado Warnings in 2020

Tornado Warning 73, NWS Lake Charles, LA

September 23, 2020Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this tornado warning at Sep 23, 2020, 2:58 PM CDT for Avoyelles 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
Sep 23, 2020, 2:58 PM CDT (19:58 UTC)
Expired
Sep 23, 2020, 3:15 PM CDT
In force
17 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 107 km from the middle of the area, began a volume at 20:01 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.

IssuedProductOfficeLasted
Sep 23, 2:37 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.0 hours before the alert went out and 208 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, Jackson, MS at 12:00Z on 2020-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Jackson, MS at 12:00Z on 2020-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

758 
WFUS54 KLCH 231958
TORLCH
LAC009-232015-
/O.NEW.KLCH.TO.W.0073.200923T1958Z-200923T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lake Charles LA
258 PM CDT Wed Sep 23 2020

The National Weather Service in Lake Charles has issued a

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

* Until 315 PM CDT.
    
* At 257 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Bordelonville, moving north at 25 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...
  Bordelonville around 305 PM CDT.
  Lake Ophelia National Wildlife Refuge around 315 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Hamburg.

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 3128 9187 3126 9185 3127 9184 3123 9179
      3122 9176 3120 9174 3120 9172 3099 9183
      3100 9193 3123 9194 3124 9192 3124 9194
      3128 9194 3130 9191
TIME...MOT...LOC 1957Z 189DEG 21KT 3105 9189 

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

$$

24
1 follow-up statement
620 
WWUS54 KLCH 232008
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
308 PM CDT Wed Sep 23 2020

LAC009-232015-
/O.CON.KLCH.TO.W.0073.000000T0000Z-200923T2015Z/
Avoyelles LA-
308 PM CDT Wed Sep 23 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR
NORTHEASTERN AVOYELLES PARISH...
    
At 307 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Bordelonville, moving north at 25 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...
  Lake Ophelia National Wildlife Refuge around 325 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 3128 9187 3126 9185 3127 9184 3123 9179
      3122 9176 3120 9174 3120 9172 3105 9181
      3106 9192 3123 9194 3124 9192 3124 9194
      3128 9194 3130 9191
TIME...MOT...LOC 2007Z 189DEG 21KT 3111 9188 

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

$$

24

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 8:42 PM CDTRiver Flood WarningLCHBeauregard, Calcasieu21 days
Sep 23, 3:15 AM CDTSpecial Marine WarningLCH60 min
Sep 23, 7:21 AM CDTSmall Craft AdvisoryLCH12 hr
Sep 23, 7:42 AM CDTFlash Flood WarningLCHBeauregard, Calcasieu, Vernon7 hr
Sep 23, 8:15 AM CDTFlash Flood WarningLCHIberia, St. Mary4 hr
Sep 23, 10:35 AM CDTFlash Flood WarningLCHAllen, Beauregard, Vernon4 hr
Sep 23, 12:25 PM CDTFlash Flood WarningLCHAllen, Evangeline, Rapides, Vernon4 hr
Sep 23, 12:44 PM CDTTornado WarningLCHEvangeline, Rapides16 min
Sep 23, 1:46 PM CDTTornado WarningLCHAvoyelles, Saint Landry14 min
Sep 23, 2:00 PM CDTTornado WarningLCHAvoyelles, Rapides15 min
Sep 23, 2:17 PM CDTTornado WarningLCHAvoyelles, Rapides13 min
Sep 23, 2:32 PM CDTRiver Flood WarningLCHRapides29 days
Sep 23, 2:35 PM CDTTornado WarningLCHAvoyelles25 min
Sep 23, 2:36 PM CDTFlash Flood WarningLCHAllen, Beauregard, Vernon3 hr
Sep 23, 2:39 PM CDTFlash Flood WarningLCHAvoyelles, Evangeline, Rapides96 min
Sep 23, 4:03 PM CDTFlash Flood WarningLCHAllen, Avoyelles, Evangeline, Rapides, Vernon6 hr

Nearby

Tornado Warnings in Louisiana, 2020Every tornado warning in 2020Tornadoes in 2020

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.