Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 28, NWS Fort Worth, TX

April 29, 2017Van Zandt County, Texas

NWS Fort Worth, TX issued this tornado warning at Apr 29, 2017, 6:50 PM CDT for Van Zandt County, Texas. 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: Apr 29, 2017, 6:50 PM CDT (23:50 UTC)
Expired: Apr 29, 2017, 7:10 PM CDT
In force: 20 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 23:50 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
Apr 29, 5:10 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.8 hours before the alert went out and 130 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: 2666 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 683 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 353 m²/s²
0-3 km storm-relative helicity: 528 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 14.1

Open this sounding in Storm Lab

The text

As transmitted.

583 
WFUS54 KFWD 292350
TORFWD
TXC467-300030-
/O.NEW.KFWD.TO.W.0028.170429T2350Z-170430T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Fort Worth TX
650 PM CDT SAT APR 29 2017

The National Weather Service in Fort Worth has issued a

* Tornado Warning for...
  Western Van Zandt County in north central Texas...

* Until 730 PM CDT.

* At 648 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 9 miles west of Canton, moving north at 20 mph.

  HAZARD...Tornado and quarter size hail. 

  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. 

* Locations impacted include...
  Canton, Wills Point, Edgewood, Fruitvale and Lake Tawakoni State
  Park.

This includes Interstate 20 between mile markers 513 and 524.
 
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 3244 9596 3245 9607 3284 9606 3284 9593
      3282 9592 3280 9590 3277 9585 3277 9581
      3278 9579 3277 9578
TIME...MOT...LOC 2348Z 197DEG 19KT 3252 9602 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

24-Bain

1 follow-up statement

798 
WWUS54 KFWD 300010
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
710 PM CDT SAT APR 29 2017

TXC467-300020-
/O.CAN.KFWD.TO.W.0028.000000T0000Z-170430T0030Z/
Van Zandt TX-
710 PM CDT SAT APR 29 2017

...THE TORNADO WARNING FOR WESTERN VAN ZANDT COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has weakened, 
therefore, the warning has been cancelled for Western Van Zandt 
County.

A tornado watch remains in effect until 1000 PM CDT for north central
Texas.

LAT...LON 3244 9596 3245 9607 3284 9606 3284 9593
      3282 9592 3280 9590 3277 9585 3277 9581
      3278 9579 3277 9578
TIME...MOT...LOC 0008Z 197DEG 19KT 3263 9598 

$$

24-Bain

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 29, 3:29 PM CDT	Special Weather Statement	FWD	Navarro	31 min
Apr 29, 3:42 PM CDT	Special Weather Statement	FWD	Rains	33 min
Apr 29, 3:46 PM CDT	Special Weather Statement	FWD	Henderson	29 min
Apr 29, 3:57 PM CDT	Severe Thunderstorm Warning	FWD	Henderson, Navarro	48 min
Apr 29, 4:17 PM CDT	Special Weather Statement	FWD	Rains	28 min
Apr 29, 4:26 PM CDT	Severe Thunderstorm Warning	FWD	Hopkins, Hunt, Rains, Van Zandt	64 min
Apr 29, 4:38 PM CDT	Severe Thunderstorm Warning	FWD	Henderson, Kaufman, Navarro, Van Zandt	67 min
Apr 29, 4:47 PM CDT	Tornado Warning	FWD	Van Zandt	43 min
Apr 29, 4:57 PM CDT	Tornado Warning	FWD	Henderson	33 min
Apr 29, 5:04 PM CDT	Severe Thunderstorm Warning	FWD	Henderson, Kaufman, Navarro	56 min
Apr 29, 5:12 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Fannin, Hopkins, Hunt, Lamar, Rains	48 min
Apr 29, 5:19 PM CDT	Areal Flood Advisory	FWD	Henderson	3 hr
Apr 29, 5:23 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Kaufman	52 min
Apr 29, 5:23 PM CDT	Tornado Warning	FWD	Henderson, Van Zandt	37 min
Apr 29, 5:31 PM CDT	Severe Thunderstorm Warning	FWD	Fannin, Hunt	59 min
Apr 29, 5:33 PM CDT	Tornado Warning	FWD	Henderson	27 min
Apr 29, 5:37 PM CDT	Tornado Warning	FWD	Delta, Hopkins, Hunt	23 min
Apr 29, 5:45 PM CDT	Tornado Warning Tornado observed	FWD	Van Zandt	30 min
Apr 29, 5:49 PM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman, Rains, Van Zandt	56 min
Apr 29, 5:57 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Henderson, Kaufman, Navarro, Rockwall, Van Zandt	63 min
Apr 29, 6:01 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Delta, Fannin, Hunt, Lamar, Rockwall	59 min
Apr 29, 6:13 PM CDT	Tornado Warning	FWD	Rains, Van Zandt	47 min
Apr 29, 6:25 PM CDT	Areal Flood Advisory	FWD	Kaufman	3 hr
Apr 29, 6:54 PM CDT	Tornado Warning	FWD	Rains, Van Zandt	36 min

Nearby

Tornado Warnings in Texas, 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.