Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 20, NWS Fort Worth, TX

October 10, 2021Johnson County, Texas

NWS Fort Worth, TX issued this tornado warning at Oct 10, 2021, 9:27 PM CDT for Johnson County, Texas. It was in force for 33 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: Oct 10, 2021, 9:27 PM CDT (02:27 UTC)
Expired: Oct 10, 2021, 10:00 PM CDT
In force: 33 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Johnson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 16 km from the middle of the area, began a volume at 02:27 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
Oct 10, 6:13 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 44 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: 1814 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 11.2

Open this sounding in Storm Lab

The text

As transmitted.

195 
WFUS54 KFWD 110227
TORFWD
TXC251-110300-
/O.NEW.KFWD.TO.W.0020.211011T0227Z-211011T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Fort Worth TX
927 PM CDT Sun Oct 10 2021

The National Weather Service in Fort Worth has issued a

* Tornado Warning for...
  Central Johnson County in north central Texas...

* Until 1000 PM CDT.
    
* At 927 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Cleburne, moving east at 55 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...
  Keene and Joshua around 930 PM CDT.
  Cross Timber around 935 PM CDT.
  Alvarado around 940 PM CDT.
  Venus around 950 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Briaroaks.

This includes Interstate 35W between mile markers 18 and 33.
 
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 3255 9710 3255 9709 3231 9709 3225 9749
      3243 9754
TIME...MOT...LOC 0227Z 256DEG 46KT 3237 9742 

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

$$

Godwin

1 follow-up statement

537 
WWUS54 KFWD 110252
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
952 PM CDT Sun Oct 10 2021

TXC251-110301-
/O.EXP.KFWD.TO.W.0020.000000T0000Z-211011T0300Z/
Johnson TX-
952 PM CDT Sun Oct 10 2021

...THE TORNADO WARNING FOR CENTRAL JOHNSON COUNTY WILL EXPIRE AT 1000
PM CDT...
                
The rotation associated with the storm that prompted the Tornado
Warning has weakened, and no longer appears capable of producing a 
tornado. Therefore the Tornado Warning will be allowed to expire at 
10 PM.

A Tornado Watch remains in effect until 200 AM CDT for north central
Texas.

LAT...LON 3255 9710 3255 9709 3231 9709 3225 9749
      3243 9754
TIME...MOT...LOC 0251Z 256DEG 46KT 3244 9711 

$$

Stalley

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 10, 7:03 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Stephens	57 min
Oct 10, 7:14 PM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath, Palo Pinto, Stephens	46 min
Oct 10, 7:23 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Stephens, Young	37 min
Oct 10, 7:42 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Eastland, Erath	48 min
Oct 10, 7:54 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Hood, Jack, Montague, Palo Pinto, Parker and 1 more	66 min
Oct 10, 8:08 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Jack, Parker, Wise	52 min
Oct 10, 8:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Palo Pinto, Parker	47 min
Oct 10, 8:23 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Comanche, Erath, Hamilton, Hood, Mills and 1 more	67 min
Oct 10, 8:50 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Cooke, Dallas, Denton, Grayson, Parker and 2 more	55 min
Oct 10, 9:06 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FWD	Collin, Cooke, Denton, Grayson	39 min
Oct 10, 9:16 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Ellis, Hill, Johnson, Somervell	59 min
Oct 10, 9:40 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Denton, Fannin, Grayson, Hunt and 3 more	65 min
Oct 10, 10:03 PM CDT	Tornado Warning	FWD	Ellis, Hill, Johnson	27 min
Oct 10, 10:10 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Freestone, Henderson, Hill, Kaufman, Limestone and 2 more	65 min
Oct 10, 10:24 PM CDT	Tornado Warning	FWD	Ellis	36 min
Oct 10, 10:34 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Fannin, Hopkins, Hunt, Kaufman, Lamar and 3 more	56 min
Oct 10, 11:04 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Henderson, Kaufman, Limestone, Navarro and 1 more	56 min
Oct 10, 11:28 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Hunt, Lamar, Rains, Van Zandt	47 min
Oct 10, 11:57 PM CDT	Special Weather Statement	FWD	Anderson, Freestone, Henderson	63 min
Oct 11, 1:09 AM CDT	Special Weather Statement	FWD	Leon	36 min
Oct 11, 1:11 AM CDT	Severe Thunderstorm Warning	FWD	Leon, Robertson	49 min

Nearby

Tornado Warnings in Texas, 2021 Every tornado warning in 2021 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.