Alert archive / Texas / Tornado Warnings in 2017

Tornado Warning 21, NWS Fort Worth, TX

April 29, 2017Van Zandt County, Texas

NWS Fort Worth, TX issued this tornado warning at Apr 29, 2017, 4:47 PM CDT for Van Zandt County, Texas. It was in force for 43 min. 1 report 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
Apr 29, 2017, 4:47 PM CDT (21:47 UTC)
Expired
Apr 29, 2017, 5:30 PM CDT
In force
43 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.25 in

County Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 138 km from the middle of the area, began a volume at 21:48 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
Apr 29, 5:19 PM CDTTSTM WND DMGCanton, TXDAMAGE ON 1255 JUST NE OF CANTON. TREES AND POWER LINES DOWN

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.8 hours before the alert went out and 142 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, Fort Worth, TX at 12:00Z on 2017-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2666 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, Fort Worth, TX at 12:00Z on 2017-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 353 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
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.

426 
WFUS54 KFWD 292147
TORFWD
TXC467-292230-
/O.NEW.KFWD.TO.W.0021.170429T2147Z-170429T2230Z/

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

The National Weather Service in Fort Worth has issued a

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

* Until 530 PM CDT.

* At 446 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Purtis Creek State Park, or 10 miles south of
  Canton, moving north at 25 mph.

  HAZARD...Tornado and half dollar 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 and Purtis Creek State Park. 

This includes Interstate 20 between mile markers 520 and 535.
 
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 3236 9580 3236 9601 3264 9595 3264 9564
TIME...MOT...LOC 2146Z 199DEG 20KT 3241 9591 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

Hernandez
1 follow-up statement
160 
WWUS54 KFWD 292205
SVSFWD

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

TXC467-292230-
/O.CON.KFWD.TO.W.0021.000000T0000Z-170429T2230Z/
Van Zandt TX-
505 PM CDT SAT APR 29 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
SOUTHWESTERN VAN ZANDT COUNTY...
    
At 505 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Canton, moving north at 30 mph.

HAZARD...Tornado and half dollar 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 and Purtis Creek State Park. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter now!  Get to an
interior room on the lowest floor of a sturdy building and avoid
windows.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 3236 9580 3236 9601 3264 9595 3264 9564
TIME...MOT...LOC 2205Z 197DEG 25KT 3253 9585 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

24-Bain

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 3:29 PM CDTSpecial Weather StatementFWDNavarro31 min
Apr 29, 3:42 PM CDTSpecial Weather StatementFWDRains33 min
Apr 29, 3:46 PM CDTSpecial Weather StatementFWDHenderson29 min
Apr 29, 3:57 PM CDTSevere Thunderstorm WarningFWDHenderson, Navarro48 min
Apr 29, 4:17 PM CDTSpecial Weather StatementFWDRains28 min
Apr 29, 4:26 PM CDTSevere Thunderstorm WarningFWDHopkins, Hunt, Rains, Van Zandt64 min
Apr 29, 4:38 PM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman, Navarro, Van Zandt67 min
Apr 29, 4:57 PM CDTTornado WarningFWDHenderson33 min
Apr 29, 5:04 PM CDTSevere Thunderstorm WarningFWDHenderson, Kaufman, Navarro56 min
Apr 29, 5:12 PM CDTSevere Thunderstorm WarningFWDDelta, Fannin, Hopkins, Hunt, Lamar, Rains48 min
Apr 29, 5:19 PM CDTAreal Flood AdvisoryFWDHenderson3 hr
Apr 29, 5:23 PM CDTSevere Thunderstorm WarningFWDEllis, Kaufman52 min
Apr 29, 5:23 PM CDTTornado WarningFWDHenderson, Van Zandt37 min
Apr 29, 5:31 PM CDTSevere Thunderstorm WarningFWDFannin, Hunt59 min
Apr 29, 5:33 PM CDTTornado WarningFWDHenderson27 min
Apr 29, 5:37 PM CDTTornado WarningFWDDelta, Hopkins, Hunt23 min
Apr 29, 5:45 PM CDTTornado Warning Tornado observedFWDVan Zandt30 min
Apr 29, 5:49 PM CDTSevere Thunderstorm WarningFWDHunt, Kaufman, Rains, Van Zandt56 min
Apr 29, 5:57 PM CDTSevere Thunderstorm WarningFWDEllis, Henderson, Kaufman, Navarro, Rockwall, Van Zandt63 min
Apr 29, 6:01 PM CDTSevere Thunderstorm WarningFWDCollin, Delta, Fannin, Hunt, Lamar, Rockwall59 min
Apr 29, 6:13 PM CDTTornado WarningFWDRains, Van Zandt47 min
Apr 29, 6:25 PM CDTAreal Flood AdvisoryFWDKaufman3 hr
Apr 29, 6:50 PM CDTTornado WarningFWDVan Zandt20 min
Apr 29, 6:54 PM CDTTornado WarningFWDRains, Van Zandt36 min

Nearby

Tornado Warnings in Texas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.