Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 9, NWS Austin/San Antonio, TX

May 4, 2001Kinney County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at May 4, 2001, 6:41 PM CDT for Kinney County, Texas. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 4, 2001, 6:41 PM CDT (23:41 UTC)
Expired: May 4, 2001, 7:45 PM CDT
In force: 64 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Kinney County, TX

The radar

The Laughlin AFB radar (KDFX), 16 km from the middle of the area, began a volume at 23:41 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
May 4, 6:55 PM CDT	Hail 0.75	Brackettville, TX

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 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, 4:30 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.7 hours before the alert went out and 41 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: 947 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KEWX 042342
TORSAT
TXC271-050045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
641 PM CDT FRI MAY 4 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  KINNEY

* UNTIL 745 PM CDT

* AT 641 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH STRONG ROTATION THAT MAY PRODUCE A TORNADO AT ANY
  TIME 24 MILES WEST OFV BRACKETTVILLE...OR ABOUT 14 MILES SOUTHEAST
  OF DEL RIO...MOVING NORTHEAST AT 20 MPH.

* THE TORNADO PRODUCING STORM IS EXPECTED TO BE...
  4 MILES NORTHWEST OF ALAMO VILLAGE AT 745 PM

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 1:42 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	63 min
May 4, 1:45 PM CDT	Flash Flood Warning	EWX	Val Verde	2 hr
May 4, 2:43 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	62 min
May 4, 3:45 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	60 min
May 4, 3:56 PM CDT	Tornado Warning	EWX	Val Verde	34 min
May 4, 4:00 PM CDT	Flash Flood Warning	EWX	Val Verde	2 hr
May 4, 5:30 PM CDT	Flash Flood Warning	EWX	Edwards	3 hr
May 4, 5:55 PM CDT	Flash Flood Warning	EWX	Val Verde	2 hr
May 4, 5:58 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	62 min
May 4, 6:42 PM CDT	Flash Flood Warning	EWX	Kinney	2 hr

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.