Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 1, NWS Fort Worth, TX

April 11, 2001Cooke County, Texas

NWS Fort Worth, TX issued this tornado warning at Apr 11, 2001, 2:43 AM CDT for Cooke County, Texas. It was in force for 47 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Apr 11, 2001, 2:43 AM CDT (07:43 UTC)
Expired
Apr 11, 2001, 3:30 AM CDT
In force
47 min
Issued by
NWS Fort Worth, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Cooke County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 106 km from the middle of the area, began a volume at 07:45 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

TimeReportWhereRemark
Apr 11, 2:47 AM CDTTornado F1Era, TXThe first of three tornadoes touched down 1 mile south of Era, moved northeast and dissipated approximately 4.5 miles northeast of Era. This tornado occurred in a thunderstorm ahead of a line of thunderstorms that produced the other two tornadoes. There was
Apr 11, 3:00 AM CDTThunderstorm Wind 52 EGainesville, TXPower lines were blown down by high winds.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 7.7 hours before the alert went out and 77 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 2001-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1205 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 2001-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 191 square meters per square second.1939587897Sfc1 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
1205 J/kg
Mixed-layer CIN
-116 J/kg
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
191 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
1.1
Supercell composite
8.1

Open this sounding in Storm Lab

The text

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

815 
WFUS54 KFWD 110743
TORFTW
TXC097-110830-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
243 AM CDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  COOKE COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 330 AM CDT

* AT 243 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 23 MILES SOUTHWEST OF
  GAINESVILLE...OR ABOUT 14 MILES WEST OF SANGER...MOVING NORTHEAST
  AT 40 MPH.

IF IN A MOBILE HOME...EVACUATE AND GET INSIDE A SUBSTANTIAL SHELTER.
IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3342 9752 3343 9711 3358 9700 3376 9721

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 12:15 AM CDTSevere Thunderstorm WarningFWDEastland60 min
Apr 11, 12:33 AM CDTSevere Thunderstorm WarningFWDStephens57 min
Apr 11, 12:58 AM CDTSevere Thunderstorm WarningFWDPalo Pinto62 min
Apr 11, 2:25 AM CDTSevere Thunderstorm WarningFWDPalo Pinto50 min
Apr 11, 2:29 AM CDTSevere Thunderstorm WarningFWDMills61 min
Apr 11, 2:35 AM CDTSevere Thunderstorm WarningFWDJack55 min
Apr 11, 2:55 AM CDTSevere Thunderstorm WarningFWDMontague, Wise65 min
Apr 11, 2:59 AM CDTSevere Thunderstorm WarningFWDComanche61 min
Apr 11, 3:28 AM CDTSevere Thunderstorm WarningFWDParker62 min
Apr 11, 3:33 AM CDTSevere Thunderstorm WarningFWDCooke57 min
Apr 11, 3:34 AM CDTSevere Thunderstorm WarningFWDMills41 min
Apr 11, 3:42 AM CDTSevere Thunderstorm WarningFWDHamilton63 min
Apr 11, 3:44 AM CDTSevere Thunderstorm WarningFWDErath, Somervell46 min
Apr 11, 3:51 AM CDTTornado WarningFWDCooke24 min
Apr 11, 4:12 AM CDTSevere Thunderstorm WarningFWDBosque63 min
Apr 11, 4:16 AM CDTSevere Thunderstorm WarningFWDDenton, Grayson59 min
Apr 11, 4:25 AM CDTSevere Thunderstorm WarningFWDJohnson50 min
Apr 11, 4:53 AM CDTSevere Thunderstorm WarningFWDTarrant37 min
Apr 11, 4:56 AM CDTSevere Thunderstorm WarningFWDHill34 min
Apr 11, 5:04 AM CDTSevere Thunderstorm WarningFWDDallas41 min
Apr 11, 5:15 AM CDTSevere Thunderstorm WarningFWDEllis30 min
Apr 11, 5:45 AM CDTSevere Thunderstorm WarningFWDKaufman45 min

Nearby

Tornado Warnings in Texas, 2001Every tornado warning in 2001Tornadoes in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.