Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 4, NWS Fort Worth, TX

May 4, 2001Dallas County, Johnson County, Tarrant County, Texas

NWS Fort Worth, TX issued this tornado warning at May 4, 2001, 9:43 PM CDT for Dallas County, Johnson County, Tarrant County, Texas. It was in force for 47 min. No storm report in the archive falls 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.

The facts

Issued: May 4, 2001, 9:43 PM CDT (02:43 UTC)
Expired: May 4, 2001, 10:30 PM CDT
In force: 47 min
Issued by: NWS Fort Worth, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Dallas County, TX, Johnson County, TX, Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 15 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 4, 7:00 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.7 hours before the alert went out and 37 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: 1422 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 904 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 332 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 13.3

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KFWD 050245
TORFTW

TXC113-251-439-050330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
943 PM CDT FRI MAY 4 2001

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWEST DALLAS COUNTY IN NORTH CENTRAL TEXAS
  EASTERN JOHNSON COUNTY IN NORTH CENTRAL TEXAS
  SOUTHEAST TARRANT COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 1030 PM CDT

* AT 943 PM CDT...SPOTTERS AND DOPPLER RADAR OBSERVED A TORNADO NEAR 
  MANSFIELD...MOVING NORTHEAST AT 30 MPH. ANOTHER STORM LIKLEY       
  PRODUCING A TORNADO IS OVER ALVARADO IN JONSON COUNTY.

  IF YOU ARE IN THE PATH OF THESE STORMS TAKE COVER IMMEDIATELY!

LAT...LON 3252 9730 3218 9722 3244 9712 3264 9691
          3277 9713

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 8:34 PM CDT	Tornado Warning	FWD	Hill, Johnson	41 min
May 5, 2:24 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton	51 min
May 5, 2:46 PM CDT	Severe Thunderstorm Warning	FWD	Bosque	59 min
May 5, 4:00 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hill	60 min
May 5, 4:05 PM CDT	Severe Thunderstorm Warning	FWD	Coryell	55 min
May 5, 5:28 PM CDT	Severe Thunderstorm Warning	FWD	McLennan	62 min
May 5, 6:02 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Navarro	43 min

Nearby

Tornado Warnings in Texas, 2001 Every tornado warning in 2001 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.