Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 21, NWS Fort Worth, TX

April 4, 20114 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 4, 2011, 6:40 AM CDT for 4 counties in Texas. It was in force for 65 min. 2 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
Apr 4, 2011, 6:40 AM CDT (11:40 UTC)
Expired
Apr 4, 2011, 7:45 AM CDT
In force
65 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon

Counties Hunt County, TX, Kaufman County, TX, Rains County, TX, Van Zandt County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 98 km from the middle of the area, began a volume at 11:43 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 4, 6:53 AM CDTTSTM WND DMG5 Ne Emory, TXNUMEROUS TREES DOWN NEAR WEST END OF LAKE FORK...STATE HIGHWAY 19...AND COUNTY ROADS 3150...3325...AND 4400.
Apr 4, 7:33 AM CDTTSTM WND DMGMabank, TXMID-SIZE TREES BLOWN DOWN WEST SIDE OF MABANK

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, 11.7 hours before the alert went out and 99 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 00:00Z on 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1169 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 00:00Z on 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 160 square meters per square second.193958Sfc1 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
1169 J/kg
Mixed-layer CIN
-459 J/kg
Mixed-layer LCL
1778 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
160 m²/s²
0-3 km storm-relative helicity
297 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

909 
WUUS54 KFWD 041140
SVRFWD
TXC231-257-379-467-041245-
/O.NEW.KFWD.SV.W.0021.110404T1140Z-110404T1245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
640 AM CDT MON APR 4 2011

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HUNT COUNTY IN NORTH CENTRAL TEXAS...
  KAUFMAN COUNTY IN NORTH CENTRAL TEXAS...
  RAINS COUNTY IN NORTHEAST TEXAS...
  WESTERN VAN ZANDT COUNTY IN NORTHEAST TEXAS...

* UNTIL 745 AM CDT

* AT 640 AM 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 6 MILES NORTHEAST OF WEST
  TAWAKONI TO COMBINE...AND MOVING EAST AT 65 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  LAKE TAWAKONI STATE PARK...KAUFMAN AND GRAYS PRAIRIE AROUND 645 AM
  WILLS POINT...KEMP AND EMORY AROUND 650 AM
  MABANK AND EDGEWOOD AROUND 700 AM
  PURTIS CREEK STATE PARK AND FRUITVALE AROUND 705 AM

THIS WILL IMPACT I-20 BETWEEN MILE MARKERS 487 AND 528.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. STAY AWAY FROM
WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN
EMERGENCY.

&&

LAT...LON 3236 9598 3236 9645 3241 9644 3248 9650
      3253 9650 3255 9653 3256 9652 3268 9652
      3283 9638 3283 9630 3292 9629 3300 9621
      3298 9566 3279 9564
TIME...MOT...LOC 1140Z 275DEG 55KT 3297 9589 3254 9643

$$
4 follow-up statements
090 
WWUS54 KFWD 041159
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
659 AM CDT MON APR 4 2011

TXC231-257-379-467-041245-
/O.CON.KFWD.SV.W.0021.000000T0000Z-110404T1245Z/
HUNT TX-RAINS TX-VAN ZANDT TX-KAUFMAN TX-
659 AM CDT MON APR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 AM CDT
FOR KAUFMAN...WESTERN VAN ZANDT...RAINS AND SOUTH CENTRAL HUNT
COUNTIES...

AT 659 AM 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 6 MILES NORTH OF EMORY TO OAK
GROVE...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  WILLS POINT...KEMP AND EMORY AROUND 705 AM CDT...
  MABANK AND EDGEWOOD AROUND 715 AM CDT...
  PURTIS CREEK STATE PARK AND FRUITVALE AROUND 720 AM CDT...
  CANTON AROUND 730 AM CDT...

THIS WILL IMPACT I-20 BETWEEN MILE MARKERS 488 AND 528.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS STREETS...DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY
MAY BE WASHED OUT.

&&

LAT...LON 3236 9598 3237 9645 3241 9644 3248 9650
      3253 9650 3255 9653 3268 9652 3284 9626
      3300 9613 3298 9566 3279 9564
TIME...MOT...LOC 1159Z 268DEG 38KT 3296 9574 3253 9628

$$
174 
WWUS54 KFWD 041214
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
714 AM CDT MON APR 4 2011

TXC231-257-379-467-041245-
/O.CON.KFWD.SV.W.0021.000000T0000Z-110404T1245Z/
HUNT TX-RAINS TX-VAN ZANDT TX-KAUFMAN TX-
714 AM CDT MON APR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 AM CDT
FOR KAUFMAN...WESTERN VAN ZANDT...RAINS AND SOUTH CENTRAL HUNT
COUNTIES...

AT 714 AM 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 EMORY TO 4 MILES WEST OF KEMP...
MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  KEMP AND EDGEWOOD AROUND 720 AM CDT...
  MABANK AND FRUITVALE AROUND 730 AM CDT...
  PURTIS CREEK STATE PARK AND CANTON AROUND 735 AM CDT...

THIS WILL IMPACT I-20 BETWEEN MILE MARKERS 498 AND 528.

LAT...LON 3236 9598 3237 9644 3237 9645 3241 9644
      3248 9650 3254 9650 3257 9645 3266 9640
      3284 9617 3299 9592 3298 9566 3279 9564
TIME...MOT...LOC 1214Z 268DEG 38KT 3286 9574 3243 9628

$$
128 
WWUS54 KFWD 041227
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
727 AM CDT MON APR 4 2011

TXC231-041238-
/O.CAN.KFWD.SV.W.0021.000000T0000Z-110404T1245Z/
HUNT TX-
727 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HUNT COUNTY IS
CANCELLED...

LAT...LON 3236 9598 3237 9636 3237 9637 3283 9610
      3285 9607 3286 9594 3290 9597 3296 9595
      3299 9592 3298 9566 3279 9564
TIME...MOT...LOC 1228Z 251DEG 27KT 3245 9617

$$

TXC257-379-467-041245-
/O.CON.KFWD.SV.W.0021.000000T0000Z-110404T1245Z/
RAINS TX-VAN ZANDT TX-KAUFMAN TX-
727 AM CDT MON APR 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 AM CDT
FOR EASTERN KAUFMAN...WESTERN VAN ZANDT AND RAINS COUNTIES...

AT 728 AM 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 NEAR
KEMP...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  PURTIS CREEK STATE PARK AROUND 745 AM CDT...

THIS WILL IMPACT I-20 BETWEEN MILE MARKERS 506 AND 528.

LAT...LON 3236 9598 3237 9636 3237 9637 3283 9610
      3285 9607 3286 9594 3290 9597 3296 9595
      3299 9592 3298 9566 3279 9564
TIME...MOT...LOC 1228Z 251DEG 27KT 3245 9617

$$
508 
WWUS54 KFWD 041245
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
745 AM CDT MON APR 4 2011

TXC257-379-467-041254-
/O.EXP.KFWD.SV.W.0021.000000T0000Z-110404T1245Z/
RAINS TX-VAN ZANDT TX-KAUFMAN TX-
745 AM CDT MON APR 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KAUFMAN...WESTERN VAN
ZANDT AND RAINS COUNTIES EXPIRES AT 745 AM CDT...

AT 744 AM CDT THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING MOVED
OUT OF THE AREA AND THE WARNING EXPIRED. HOWEVER...A SEVERE 
THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM FOR AREAS 
FURTHER EAST...INCLUDING THE EASTERN PARTS OF RAINS COUNTY AND 
CENTRAL AND EASTERN PARTS OF VAN ZANDT COUNTY. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT MONDAY
AFTERNOON FOR EASTERN TEXAS.

LAT...LON 3236 9598 3237 9636 3237 9637 3283 9610
      3285 9607 3286 9594 3290 9597 3296 9595
      3299 9592 3298 9566 3279 9564
TIME...MOT...LOC 1244Z 251DEG 27KT 3249 9604

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 10:28 PM CDTSpecial Weather StatementFWDStephens32 min
Apr 4, 1:42 AM CDTSpecial Weather StatementFWDComanche33 min
Apr 4, 2:03 AM CDTSpecial Weather StatementFWDComanche, Erath27 min
Apr 4, 2:25 AM CDTSpecial Weather StatementFWDHamilton35 min
Apr 4, 2:28 AM CDTSpecial Weather StatementFWDSomervell32 min
Apr 4, 2:59 AM CDTSpecial Weather StatementFWDBosque31 min
Apr 4, 3:29 AM CDTSpecial Weather StatementFWDJohnson31 min
Apr 4, 3:32 AM CDTSpecial Weather StatementFWDPalo Pinto28 min
Apr 4, 3:42 AM CDTSpecial Weather StatementFWDTarrant33 min
Apr 4, 3:48 AM CDTSevere Thunderstorm WarningFWDCollin, Dallas, Denton, Tarrant57 min
Apr 4, 4:18 AM CDTSpecial Weather StatementFWDJohnson27 min
Apr 4, 4:44 AM CDTSevere Thunderstorm WarningFWDCollin, Dallas, Denton, Kaufman, Rockwall, Tarrant61 min
Apr 4, 4:46 AM CDTSpecial Weather StatementFWDHood, Somervell29 min
Apr 4, 4:50 AM CDTSpecial Weather StatementFWDJohnson25 min
Apr 4, 5:04 AM CDTSevere Thunderstorm WarningFWDJohnson, Parker, Tarrant41 min
Apr 4, 5:05 AM CDTSpecial Weather StatementFWDErath25 min
Apr 4, 5:18 AM CDTAreal Flood AdvisoryFWDCollin, Dallas, Denton, Tarrant3 hr
Apr 4, 5:43 AM CDTSevere Thunderstorm WarningFWDDallas, Ellis, Hunt, Johnson, Kaufman, Rockwall and 1 more62 min
Apr 4, 5:44 AM CDTSpecial Weather StatementFWDFannin31 min
Apr 4, 5:57 AM CDTSpecial Weather StatementFWDCollin33 min
Apr 4, 6:15 AM CDTSevere Thunderstorm WarningFWDHunt50 min
Apr 4, 6:22 AM CDTSpecial Weather StatementFWDBosque, Hill23 min
Apr 4, 6:38 AM CDTSpecial Weather StatementFWDNavarro22 min
Apr 4, 6:52 AM CDTSpecial Weather StatementFWDHill38 min
Apr 4, 6:52 AM CDTSevere Thunderstorm WarningFWDHopkins53 min
Apr 4, 6:59 AM CDTSevere Thunderstorm WarningFWDBosque, Coryell, Hill, McLennan46 min
Apr 4, 7:14 AM CDTSpecial Weather StatementFWDHenderson31 min
Apr 4, 7:19 AM CDTSevere Thunderstorm WarningFWDRains, Van Zandt56 min
Apr 4, 7:43 AM CDTRiver Flood WarningFWDDallas3 hr
Apr 4, 7:47 AM CDTSpecial Weather StatementFWDHenderson28 min
Apr 4, 7:53 AM CDTSevere Thunderstorm WarningFWDAnderson, Henderson52 min
Apr 4, 7:58 AM CDTSevere Thunderstorm WarningFWDMilam47 min
Apr 4, 8:01 AM CDTSevere Thunderstorm WarningFWDAnderson, Freestone, Leon, Limestone59 min
Apr 4, 8:23 AM CDTSpecial Weather StatementFWDLeon, Robertson37 min
Apr 4, 8:26 AM CDTSevere Thunderstorm WarningFWDLeon, Robertson64 min
Apr 4, 8:30 AM CDTSevere Thunderstorm WarningFWDRobertson43 min
Apr 4, 9:34 AM CDTSpecial Weather StatementFWDAnderson26 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011Every 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.