Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 430, NWS Fort Worth, TX

June 20, 2011Denton County, Wise County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 20, 2011, 9:43 PM CDT for Denton County, Wise County, Texas. It was in force for 62 min. 3 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: Jun 20, 2011, 9:43 PM CDT (02:43 UTC)
Expired: Jun 20, 2011, 10:45 PM CDT
In force: 62 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Denton County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 83 km from the middle of the area, began a volume at 02:45 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
Jun 20, 9:58 PM CDT	TSTM WND GST 70	Decatur, TX	REPORTED ROOF/STRUCTURAL DAMAGE
Jun 20, 10:32 PM CDT	HAIL 1	9 W Denton, TX	ON HWY 380
Jun 20, 10:39 PM CDT	HAIL 0.88	Krum, 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.

Issued	Product	Office	Lasted
Jun 20, 3:42 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.7 hours before the alert went out and 55 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: 1045 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 2415 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

265 
WUUS54 KFWD 210243
SVRFWD
TXC121-497-210345-
/O.NEW.KFWD.SV.W.0430.110621T0243Z-110621T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
943 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN DENTON COUNTY IN NORTH CENTRAL TEXAS...
  WISE COUNTY IN NORTH CENTRAL TEXAS...

* UNTIL 1045 PM CDT

* AT 943 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 5 MILES
  NORTHWEST OF DECATUR...AND MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KRUM AROUND 1030 PM...
  SANGER AROUND 1040 PM...
  DENTON AROUND 1045 PM...

THIS WILL IMPACT I-35 BETWEEN MILE MARKERS 475 AND 476.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MONDAY
EVENING FOR NORTH CENTRAL TEXAS.

&&

LAT...LON 3342 9716 3331 9703 3310 9722 3311 9792
      3329 9791 3332 9779 3343 9774
TIME...MOT...LOC 0243Z 268DEG 25KT 3329 9763

$$


85/NH

2 follow-up statements

419 
WWUS54 KFWD 210308
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1008 PM CDT MON JUN 20 2011

TXC121-497-210345-
/O.CON.KFWD.SV.W.0430.000000T0000Z-110621T0345Z/
DENTON TX-WISE TX-
1008 PM CDT MON JUN 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR NORTHERN WISE AND WESTERN DENTON COUNTIES...

AT 1008 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 8 MILES
EAST OF DECATUR...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PONDER AROUND 1030 PM CDT...
  KRUM AND CORRAL CITY AROUND 1035 PM CDT...
  SANGER AROUND 1040 PM CDT...
  DENTON AROUND 1045 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3312 9791 3328 9774 3343 9767 3342 9716
      3331 9703 3310 9722
TIME...MOT...LOC 0308Z 270DEG 25KT 3327 9746

$$


92

888 
WWUS54 KFWD 210324
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1024 PM CDT MON JUN 20 2011

TXC121-497-210345-
/O.CON.KFWD.SV.W.0430.000000T0000Z-110621T0345Z/
DENTON TX-WISE TX-
1024 PM CDT MON JUN 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR NORTHERN WISE AND WESTERN DENTON COUNTIES...

AT 1024 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM SANGER TO KRUM TO 8 MILES
SOUTHWEST OF PONDER...MOVING EAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  DENTON AROUND 1030 PM CDT...
  CORRAL CITY AROUND 1035 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE. SEEK SHELTER NOW  
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3312 9788 3328 9758 3343 9745 3342 9716
      3331 9703 3310 9722
TIME...MOT...LOC 0324Z 270DEG 36KT 3340 9712 3325 9719
          3311 9735

$$


92

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:03 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Young	57 min
Jun 20, 7:15 PM CDT	Severe Thunderstorm Warning	FWD	Jack	45 min
Jun 20, 7:40 PM CDT	Severe Thunderstorm Warning	FWD	Stephens, Young	65 min
Jun 20, 7:42 PM CDT	Severe Thunderstorm Warning	FWD	Montague, Wise	39 min
Jun 20, 7:57 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Wise	63 min
Jun 20, 8:30 PM CDT	Severe Thunderstorm Warning	FWD	Jack	60 min
Jun 20, 8:38 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Stephens, Young	52 min
Jun 20, 8:45 PM CDT	Tornado Warning	FWD	Palo Pinto, Young	30 min
Jun 20, 8:56 PM CDT	Severe Thunderstorm Warning	FWD	Wise	49 min
Jun 20, 9:15 PM CDT	Tornado Warning	FWD	Palo Pinto	30 min
Jun 20, 9:17 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Denton	58 min
Jun 20, 9:28 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Parker, Wise, Young	62 min
Jun 20, 10:29 PM CDT	Severe Thunderstorm Warning	FWD	Parker, Wise	61 min
Jun 20, 10:31 PM CDT	Severe Thunderstorm Warning	FWD	Denton	59 min
Jun 20, 11:00 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Tarrant	60 min
Jun 20, 11:13 PM CDT	Special Weather Statement	FWD	Grayson	62 min
Jun 20, 11:20 PM CDT	Special Weather Statement	FWD	Montague	55 min
Jun 20, 11:25 PM CDT	Severe Thunderstorm Warning	FWD	Grayson	44 min
Jun 20, 11:33 PM CDT	Special Weather Statement	FWD	Young	27 min
Jun 20, 11:55 PM CDT	Severe Thunderstorm Warning	FWD	Fannin	35 min
Jun 21, 12:08 AM CDT	Severe Thunderstorm Warning	FWD	Montague	49 min
Jun 21, 12:28 AM CDT	Severe Thunderstorm Warning	FWD	Eastland, Stephens	62 min
Jun 21, 12:35 AM CDT	Special Weather Statement	FWD	Jack	55 min
Jun 21, 12:58 AM CDT	Special Weather Statement	FWD	Wise	62 min
Jun 21, 1:13 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Jack, Wise	62 min
Jun 21, 1:50 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	55 min
Jun 21, 2:10 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Grayson	50 min
Jun 21, 2:25 AM CDT	Severe Thunderstorm Warning	FWD	Denton	20 min
Jun 21, 2:43 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Denton	62 min
Jun 21, 2:46 AM CDT	Severe Thunderstorm Warning	FWD	Parker, Tarrant	59 min
Jun 21, 3:02 AM CDT	Severe Thunderstorm Warning	FWD	Dallas	43 min
Jun 21, 3:23 AM CDT	Areal Flood Advisory	FWD	Dallas, Tarrant	3 hr
Jun 21, 3:37 AM CDT	Special Weather Statement	FWD	Fannin, Hunt, Kaufman, Rockwall	23 min
Jun 21, 3:49 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Hunt	38 min
Jun 21, 4:03 AM CDT	Special Weather Statement	FWD	Delta, Hopkins, Lamar	57 min
Jun 21, 4:45 AM CDT	Flash Flood Warning	FWD	Dallas, Tarrant	3 hr
Jun 21, 4:50 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Tarrant	40 min
Jun 21, 5:01 AM CDT	Special Weather Statement	FWD	Dallas	29 min
Jun 21, 5:42 AM CDT	River Flood Warning	FWD	Dallas	106 min
Jun 21, 5:58 AM CDT	Special Weather Statement	FWD	Kaufman	32 min
Jun 21, 6:26 AM CDT	Special Weather Statement	FWD	Kaufman	34 min
Jun 21, 6:59 AM CDT	Special Weather Statement	FWD	Van Zandt	31 min
Jun 21, 7:30 AM CDT	Special Weather Statement	FWD	Kaufman	30 min
Jun 21, 7:31 AM CDT	Special Weather Statement	FWD	Van Zandt	29 min
Jun 21, 8:00 AM CDT	Special Weather Statement	FWD	Van Zandt	30 min
Jun 21, 8:17 AM CDT	Severe Thunderstorm Warning	FWD	Henderson, Van Zandt	58 min
Jun 21, 5:15 PM CDT	Special Weather Statement	FWD	Eastland	30 min
Jun 21, 5:27 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Eastland	63 min
Jun 21, 6:00 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	30 min
Jun 21, 6:30 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	60 min
Jun 21, 6:47 PM CDT	Severe Thunderstorm Warning	FWD	Stephens	58 min
Jun 21, 6:53 PM CDT	Special Weather Statement	FWD	Erath	37 min
Jun 21, 6:58 PM CDT	Severe Thunderstorm Warning	FWD	Erath, Palo Pinto	62 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning in 2011

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.