Alert archive / Texas / Tornado Warnings in 2017
Tornado Warning 39, NWS Fort Worth, TX
NWS Fort Worth, TX issued this tornado warning at Aug 12, 2017, 7:18 PM CDT for Van Zandt County, Texas. It was in force for 42 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
- Aug 12, 2017, 7:18 PM CDT (00:18 UTC)
- Expired
- Aug 12, 2017, 8:00 PM CDT
- In force
- 42 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), 135 km from the middle of the area, began a volume at 00:22 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 12, 7:40 PM CDT | TSTM WND DMG | 4 N Walton, TX | A FEW LARGE TREES DOWNED IN THE CR2319 AREA. |
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 00:00Z, 0.3 hours before the alert went out and 139 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.
- Mixed-layer CAPE
- 1231 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1074 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 9.0
The text
As transmitted.
491
WFUS54 KFWD 130018
TORFWD
TXC467-130100-
/O.NEW.KFWD.TO.W.0039.170813T0018Z-170813T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Fort Worth TX
718 PM CDT SAT AUG 12 2017
The National Weather Service in Fort Worth has issued a
* Tornado Warning for...
Southwestern Van Zandt County in north central Texas...
* Until 800 PM CDT.
* At 718 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Canton, moving east at 15 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.
* This dangerous storm will be near...
Canton around 725 PM CDT.
This includes Interstate 20 between mile markers 524 and 538.
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 3243 9601 3260 9597 3258 9564 3236 9572
TIME...MOT...LOC 0018Z 284DEG 15KT 3253 9595
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
Dunn4 follow-up statements
106
WWUS54 KFWD 130024
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
724 PM CDT SAT AUG 12 2017
TXC467-130100-
/O.CON.KFWD.TO.W.0039.000000T0000Z-170813T0100Z/
Van Zandt TX-
724 PM CDT SAT AUG 12 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHWESTERN VAN ZANDT COUNTY...
At 723 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Canton, moving east at 15 mph. Highway 19 and 198
just south of Canton are in the path of the strongest circulation.
HAZARD...Tornado and half dollar size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Canton around 730 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter now! Get to an
interior room on the lowest floor of a sturdy building and avoid
windows.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 3243 9601 3260 9597 3258 9564 3236 9572
TIME...MOT...LOC 0023Z 284DEG 15KT 3252 9592
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
91910
WWUS54 KFWD 130033
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
733 PM CDT SAT AUG 12 2017
TXC467-130100-
/O.CON.KFWD.TO.W.0039.000000T0000Z-170813T0100Z/
Van Zandt TX-
733 PM CDT SAT AUG 12 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
SOUTHWESTERN VAN ZANDT COUNTY...
At 732 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Canton, moving east at 20 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.
This tornadic thunderstorm will pass very near Canton and cross
Highway 19 and Highway 64 southeast of Canton.
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.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 3244 9595 3255 9592 3254 9566 3236 9572
TIME...MOT...LOC 0032Z 285DEG 15KT 3249 9586
TORNADO...RADAR INDICATED
HAIL...1.25IN
$$
Dunn487
WWUS54 KFWD 130046
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
746 PM CDT SAT AUG 12 2017
TXC467-130100-
/O.CON.KFWD.TO.W.0039.000000T0000Z-170813T0100Z/
Van Zandt TX-
746 PM CDT SAT AUG 12 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR SOUTH
CENTRAL VAN ZANDT COUNTY...
At 745 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Canton, moving east at 15 mph. The
circulation has weakened but still persists.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
south central Van Zandt County including the town of Colfax.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter now! Get to an
interior room on the lowest floor of a sturdy building and avoid
windows.
&&
LAT...LON 3241 9587 3253 9585 3252 9567 3236 9572
TIME...MOT...LOC 0045Z 286DEG 15KT 3245 9580
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Dunn579
WWUS54 KFWD 130059
SVSFWD
Severe Weather Statement
National Weather Service Fort Worth TX
759 PM CDT SAT AUG 12 2017
TXC467-130108-
/O.EXP.KFWD.TO.W.0039.000000T0000Z-170813T0100Z/
Van Zandt TX-
759 PM CDT SAT AUG 12 2017
...THE TORNADO WARNING FOR SOUTH CENTRAL VAN ZANDT COUNTY WILL EXPIRE
AT 800 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
8 PM. However small hail, gusty winds and heavy rain are still
possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Fort Worth.
LAT...LON 3241 9587 3253 9585 3252 9567 3236 9572
TIME...MOT...LOC 0058Z 284DEG 15KT 3244 9574
$$
24-BainThe office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 7:03 PM CDT | Severe Thunderstorm Warning | FWD | Van Zandt | 57 min |
| Aug 12, 7:39 PM CDT | River Flood Warning | FWD | Hunt | 62 hr |
| Aug 12, 8:02 PM CDT | Special Weather Statement | FWD | Henderson | 43 min |
| Aug 12, 8:22 PM CDT | Special Weather Statement | FWD | Tarrant | 53 min |
| Aug 12, 8:33 PM CDT | Special Weather Statement | FWD | Parker | 57 min |
| Aug 12, 8:35 PM CDT | Special Weather Statement | FWD | Grayson | 25 min |
| Aug 12, 8:45 PM CDT | Severe Thunderstorm Warning | FWD | Cooke, Grayson | 40 min |
| Aug 12, 9:10 PM CDT | Special Weather Statement | FWD | Dallas | 50 min |
| Aug 12, 9:12 PM CDT | Areal Flood Advisory | FWD | Henderson | 2 hr |
| Aug 12, 9:27 PM CDT | Special Weather Statement | FWD | Grayson | 48 min |
| Aug 12, 9:33 PM CDT | Areal Flood Advisory | FWD | Grayson | 117 min |
| Aug 12, 9:54 PM CDT | Special Weather Statement | FWD | Rockwall | 51 min |
| Aug 12, 10:11 PM CDT | Areal Flood Advisory | FWD | Collin, Dallas | 2 hr |
| Aug 12, 10:39 PM CDT | Areal Flood Advisory | FWD | Collin, Fannin, Hunt | 3 hr |
| Aug 12, 11:17 PM CDT | Areal Flood Advisory | FWD | Fannin, Hunt | 3 hr |
| Aug 13, 12:01 AM CDT | Areal Flood Advisory | FWD | Collin, Dallas, Denton | 3 hr |
| Aug 13, 2:12 AM CDT | Areal Flood Advisory | FWD | Delta, Hopkins | 3 hr |
| Aug 13, 2:44 AM CDT | Areal Flood Advisory | FWD | Fannin, Grayson | 2 hr |
| Aug 13, 3:18 AM CDT | Flash Flood Warning | FWD | Grayson | 5 hr |
| Aug 13, 3:25 AM CDT | Flash Flood Warning | FWD | Fannin | 3 hr |
| Aug 13, 3:33 AM CDT | Flash Flood Warning | FWD | Hopkins | 4 hr |
| Aug 13, 4:45 AM CDT | Areal Flood Advisory | FWD | Delta, Hopkins, Hunt | 2 hr |
| Aug 13, 6:29 AM CDT | Flash Flood Warning | FWD | Delta, Fannin, Hopkins, Hunt | 4 hr |
| Aug 13, 7:04 AM CDT | River Flood Warning | FWD | Hunt, Rockwall | 33 hr |
| Aug 13, 7:37 AM CDT | Areal Flood Advisory | FWD | Rains, Van Zandt | 113 min |
| Aug 13, 7:43 AM CDT | River Flood Warning | FWD | Delta, Lamar | 18 hr |
| Aug 13, 7:43 AM CDT | River Flood Warning | FWD | Delta, Hopkins | 30 hr |
| Aug 13, 8:18 AM CDT | Areal Flood Warning | FWD | Grayson | 3 hr |
| Aug 13, 6:57 PM CDT | River Flood Warning | FWD | Collin | 15 hr |
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.