Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 252, NWS Fort Worth, TX

August 12, 20124 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Aug 12, 2012, 4:31 PM CDT for 4 counties in Texas. It was in force for 74 min. 5 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
Aug 12, 2012, 4:31 PM CDT (21:31 UTC)
Expired
Aug 12, 2012, 5:45 PM CDT
In force
74 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

Counties Cooke County, TX, Denton County, TX, Montague County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 118 km from the middle of the area, began a volume at 21:31 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
Aug 12, 5:03 PM CDTHAIL 1Lindsay, TXALSO REPORTED A LARGE WOODEN SWINGSET DESTROYED BY THUNDERSTORM WINDS.
Aug 12, 5:17 PM CDTTSTM WND GST 603 Nne Gainesville, TXLARGE BRANCHES ALSO DOWN.
Aug 12, 5:32 PM CDTTSTM WND DMG4 N Valley View, TXESTIMATED 60 MPH WINDS BLEW A SEMI-TRUCK ONTO A PICKUP ON SOUTHBOUND I-35 AT EXIT 491. INTERSTATE CLOSED AT THIS TIME.
Aug 12, 5:34 PM CDTHAIL 1.751 E Valley View, TX
Aug 12, 5:35 PM CDTHAIL 1Valley View, TX

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 12, 3:55 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.5 hours before the alert went out and 89 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 2012-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 792 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, Fort Worth, TX at 12:00Z on 2012-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
792 J/kg
Mixed-layer CIN
-434 J/kg
Mixed-layer LCL
1708 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

177 
WUUS54 KFWD 122131
SVRFWD
TXC097-121-337-497-122245-
/O.NEW.KFWD.SV.W.0252.120812T2131Z-120812T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
431 PM CDT SUN AUG 12 2012

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COOKE COUNTY IN NORTH CENTRAL TEXAS...
  NORTHWESTERN DENTON COUNTY IN NORTH CENTRAL TEXAS...
  SOUTHEASTERN MONTAGUE COUNTY IN NORTH CENTRAL TEXAS...
  NORTHEASTERN WISE COUNTY IN NORTH CENTRAL TEXAS...

* UNTIL 545 PM CDT

* AT 431 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
  SOUTH OF FORESTBURG...MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MUENSTER AROUND 455 PM...
  LINDSAY AROUND 520 PM...
  KRUM AND GAINESVILLE AROUND 530 PM...
  SANGER AROUND 535 PM...
  RAY ROBERTS PARK JOHNSON BRANCH AROUND 545 PM...

THIS WILL IMPACT I-35 BETWEEN MILE MARKERS 477 AND 484.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AND
STAY INSIDE...AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3377 9718 3374 9717 3372 9711 3374 9709
      3373 9706 3334 9701 3315 9729 3334 9769
      3383 9744 3383 9736
TIME...MOT...LOC 2131Z 280DEG 18KT 3345 9756

$$


85/NH
3 follow-up statements
970 
WWUS54 KFWD 122157
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
457 PM CDT SUN AUG 12 2012

TXC097-121-337-497-122245-
/O.CON.KFWD.SV.W.0252.000000T0000Z-120812T2245Z/
DENTON TX-MONTAGUE TX-WISE TX-COOKE TX-
457 PM CDT SUN AUG 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT 
FOR COOKE...WISE...SOUTHEASTERN MONTAGUE AND NORTHWESTERN DENTON 
COUNTIES...

AT 455 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED TWO 
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS 
OF 60 MPH. THESE STORMS WERE LOCATED 5 MILES SOUTHWEST OF LINDSAY 
AND 9 MILES NORTHEAST OF DECATUR...MOVING SOUTHEAST AT 25 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  GAINESVILLE AROUND 505 PM CDT...
  VALLEY VIEW AROUND 515 PM CDT...
  SANGER...PONDER AND KRUM AROUND 530 PM CDT...

THIS WILL IMPACT I-35 BETWEEN MILE MARKERS 477 AND 485.


LAT...LON 3373 9747 3374 9717 3372 9711 3374 9709
      3373 9706 3334 9701 3315 9729 3334 9769
      3340 9766
TIME...MOT...LOC 2155Z 296DEG 20KT 3357 9727 3333 9746

$$


92
546 
WWUS54 KFWD 122229
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
529 PM CDT SUN AUG 12 2012

TXC097-121-337-497-122245-
/O.CON.KFWD.SV.W.0252.000000T0000Z-120812T2245Z/
DENTON TX-MONTAGUE TX-WISE TX-COOKE TX-
529 PM CDT SUN AUG 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT 
FOR SOUTHERN COOKE...WISE...SOUTHEASTERN MONTAGUE AND NORTHWESTERN 
DENTON COUNTIES...

AT 528 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED TWO 
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED 4 
MILES NORTHEAST OF VALLEY AND ALSO 5 MILES EAST OF 
FORESTBURG...MOVING SOUTHEAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  RURAL SOUTHERN COOKE COUNTY AT 540 PM CDT
  RURAL NORTHEASTERN WISE COUNTY AT 540 PM CDT
  RURAL NORTHWESTERN DENTON COUNTY AT 540 PM CDT

THIS WILL IMPACT I-35 BETWEEN MILE MARKERS 484 AND 486.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.

&&

LAT...LON 3354 9758 3363 9705 3343 9702 3342 9725
      3321 9740 3334 9769 3340 9766
TIME...MOT...LOC 2228Z 294DEG 18KT 3352 9710 3338 9760

$$
055 
WWUS54 KFWD 122232
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
532 PM CDT SUN AUG 12 2012

TXC097-121-337-497-122245-
/O.CON.KFWD.SV.W.0252.000000T0000Z-120812T2245Z/
DENTON TX-MONTAGUE TX-WISE TX-COOKE TX-
532 PM CDT SUN AUG 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN COOKE...NORTHEASTERN WISE...SOUTHEASTERN MONTAGUE AND
NORTHWESTERN DENTON COUNTIES...

AT 532 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED TWO 
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED 4 
MILES NORTHEAST OF VALLEY VIEW AND 5 MILES EAST ALVORD...MOVING 
SOUTHEAST AT 20 MPH.

THIS WILL IMPACT I-35 BETWEEN MILE MARKERS 484 AND 486.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.

&&

LAT...LON 3354 9758 3363 9705 3343 9702 3342 9725
      3321 9740 3334 9769 3340 9766
TIME...MOT...LOC 2232Z 294DEG 18KT 3351 9708 3337 9758

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 3:21 PM CDTSpecial Weather StatementFWDStephens24 min
Aug 12, 3:24 PM CDTSpecial Weather StatementFWDYoung36 min
Aug 12, 3:38 PM CDTSevere Thunderstorm WarningFWDYoung52 min
Aug 12, 3:44 PM CDTSpecial Weather StatementFWDJack31 min
Aug 12, 3:52 PM CDTSevere Thunderstorm WarningFWDJack, Wise53 min
Aug 12, 4:08 PM CDTSpecial Weather StatementFWDPalo Pinto37 min
Aug 12, 4:20 PM CDTSpecial Weather StatementFWDMontague25 min
Aug 12, 4:38 PM CDTSevere Thunderstorm WarningFWDJack, Wise67 min
Aug 12, 5:33 PM CDTSpecial Weather StatementFWDStephens27 min
Aug 12, 5:37 PM CDTSevere Thunderstorm WarningFWDStephens53 min
Aug 12, 5:39 PM CDTSevere Thunderstorm WarningFWDCollin, Cooke, Denton, Grayson29 min
Aug 12, 5:44 PM CDTSevere Thunderstorm WarningFWDDenton, Wise61 min
Aug 12, 6:10 PM CDTSpecial Weather StatementFWDTarrant35 min
Aug 12, 6:18 PM CDTSevere Thunderstorm WarningFWDTarrant57 min
Aug 12, 6:58 PM CDTSevere Thunderstorm WarningFWDTarrant62 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012

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.