Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 33, NWS Shreveport, LA

November 11, 2021Harrison County, Panola County, Texas; Caddo Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Nov 11, 2021, 12:50 AM CST for Harrison County, Panola County, Texas; Caddo Parish, Louisiana. It was in force for 25 min. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Nov 11, 2021, 12:50 AM CST (06:50 UTC)
Expired
Nov 11, 2021, 1:15 AM CST
In force
25 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Caddo Parish, LA, Harrison County, TX, Panola County, TX

The radar

The Shreveport radar (KSHV), 22 km from the middle of the area, began a volume at 06:53 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.

What was reported inside it

TimeReportWhereRemark
Nov 11, 12:51 AM CSTTORNADO6 Ssw Waskom, TXA LOW END EF1 TORNADO TOUCHED DOWN IN RURAL SOUTHEASTERN HARRISON COUNTY DOING ONLY TREE DAMAGE FROM FARM ROAD 9 EAST TO JUST BEFORE THE STATE LINE. THERE WAS AN ASSOCIATED TORNADIC DEBRIS SIGNATURE ON RADAR. THE TORNADO HAD MAX WINDS OF 95 MPH, LENGTH OF 2.6
Nov 11, 12:51 AM CSTTORNADO6 Ssw Waskom, TXCORRECTS PREVIOUS TORNADO REPORT FROM 6 SSW WASKOM. A LOW END EF1 TORNADO TOUCHED DOWN IN RURAL SOUTHEASTERN HARRISON COUNTY DOING ONLY TREE DAMAGE FROM FARM ROAD 9 EAST TO JUST BEFORE THE STATE LINE. THERE WAS AN ASSOCIATED TORNADIC DEBRIS SIGNATURE ON RADAR.
Nov 11, 12:57 AM CSTTSTM WND DMG6 Sw Blanchard, LATREES DOWN NEAR LOWRY ROAD AND HWY. 169.
Nov 11, 1:00 AM CSTTSTM WND DMG3 Ssw Blanchard, LASEVERAL TREES DOWNED ON PINE ISLAND ROAD. TREES ON A HOME.
Nov 11, 1:02 AM CSTTORNADO4 Ssw Blanchard, LAA BRIEF EF-1 TORNADO EMBEDDED WITHIN A LINE OF THUNDERSTORMS TOUCHED DOWN NEAR EAST PINE ISLAND ROAD OFF NORTH CROSS LAKE. THE TORNADO SNAPPED MANY LARGE SOFTWOOD AND HARDWOOD TREES AND ALSO UPROOTED A FEW TREES. PATH LENGTH WAS 0.17 MILES WITH A WIDTH OF 100
Nov 11, 1:03 AM CSTTSTM WND DMG4 S Greenwood, LACORRECTS TIME OF PREVIOUS TSTM WND DMG REPORT FROM 4 S GREENWOOD. TREES DOWN NEAR THE BEAVERS NEST SUBDIVISION ALONG HWY. 169 BETWEEN BUNCOMBE ROAD AND PROVIDENCE ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.8 hours before the alert went out and 31 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, Shreveport, LA at 00:00Z on 2021-11-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 158 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2021-11-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 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
158 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
968 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
302 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

094 
WFUS54 KSHV 110650
TORSHV
LAC017-TXC203-365-110715-
/O.NEW.KSHV.TO.W.0033.211111T0650Z-211111T0715Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
1250 AM CST Thu Nov 11 2021

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  West central Caddo Parish in northwestern Louisiana...
  Southeastern Harrison County in northeastern Texas...
  Northeastern Panola County in northeastern Texas...

* Until 115 AM CST.

* At 1250 AM CST, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Waskom, or 15 miles southeast of Marshall, moving east at 50 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.

* These dangerous storms will be near...
  Greenwood around 100 AM CST.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3235 9420 3248 9419 3258 9391 3239 9386
TIME...MOT...LOC 0650Z 266DEG 43KT 3242 9412 

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

$$

24
1 follow-up statement
909 
WWUS54 KSHV 110702
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
102 AM CST Thu Nov 11 2021

TXC203-365-110712-
/O.CAN.KSHV.TO.W.0033.000000T0000Z-211111T0715Z/
Harrison TX-Panola TX-
102 AM CST Thu Nov 11 2021

...THE TORNADO WARNING FOR SOUTHEASTERN HARRISON AND NORTHEASTERN
PANOLA COUNTIES IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3238 9404 3253 9404 3258 9391 3239 9386
TIME...MOT...LOC 0702Z 265DEG 42KT 3242 9396 

$$

LAC017-110715-
/O.CON.KSHV.TO.W.0033.000000T0000Z-211111T0715Z/
Caddo LA-
102 AM CST Thu Nov 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 AM CST FOR WEST
CENTRAL CADDO PARISH...

At 102 AM CST, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located over
Greenwood, or 10 miles west of Shreveport, moving east at 50 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
west central Caddo Parish.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3238 9404 3253 9404 3258 9391 3239 9386
TIME...MOT...LOC 0702Z 265DEG 42KT 3242 9396 

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

$$

24

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 10, 10:28 PM CSTSpecial Weather StatementSHVFranklin, Wood62 min
Nov 10, 10:39 PM CSTSpecial Weather StatementSHVRed River51 min
Nov 10, 10:46 PM CSTSevere Thunderstorm WarningSHVCamp, Franklin, Marion, Morris, Titus, Upshur and 1 more59 min
Nov 10, 11:09 PM CSTSpecial Weather StatementSHVSmith51 min
Nov 10, 11:37 PM CSTSpecial Weather StatementSHVCass, Morris, Upshur23 min
Nov 10, 11:54 PM CSTSpecial Weather StatementSHVGregg, Harrison, Marion, Rusk66 min
Nov 11, 12:33 AM CSTSpecial Weather StatementSHVCherokee27 min
Nov 11, 12:36 AM CSTSpecial Weather StatementSHVPanola, Rusk39 min
Nov 11, 1:18 AM CSTSpecial Weather StatementSHVShelby57 min
Nov 11, 2:20 AM CSTSpecial Weather StatementSHVSabine, San Augustine40 min
Nov 11, 2:23 AM CSTSpecial Weather StatementSHVCherokee52 min
Nov 11, 3:01 AM CSTSpecial Weather StatementSHVAngelina, Sabine44 min
Nov 11, 3:49 AM CSTSpecial Weather StatementSHVAngelina26 min
Nov 11, 1:14 AM CSTTornado WarningSHVBossier, Caddo22 min
Nov 11, 1:23 AM CSTSpecial Weather StatementSHVBossier, Webster67 min
Nov 11, 1:32 AM CSTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 2 more58 min
Nov 11, 2:05 AM CSTTornado WarningSHVBienville, Red River25 min
Nov 11, 2:30 AM CSTSpecial Weather StatementSHVBienville, Lincoln45 min
Nov 11, 2:56 AM CSTSpecial Weather StatementSHVJackson, Lincoln, Union34 min
Nov 11, 2:59 AM CSTSpecial Weather StatementSHVNatchitoches, Sabine, Winn46 min
Nov 11, 3:26 AM CSTSpecial Weather StatementSHVOuachita64 min
Nov 11, 3:45 AM CSTSpecial Weather StatementSHVCaldwell, Grant, Winn60 min
Nov 11, 4:36 AM CSTSpecial Weather StatementSHVLaSalle24 min

Nearby

Tornado Warnings in Texas, 2021Tornado Warnings in Louisiana, 2021Every tornado warning in 2021Tornadoes in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.