Alert archive / Texas / Tornado Warnings in 2007

Tornado Warning 21, NWS Lubbock, TX

April 21, 2007Lamb County, Texas

NWS Lubbock, TX issued this tornado warning at Apr 21, 2007, 6:56 PM CDT for Lamb County, Texas. It was in force for 34 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: Apr 21, 2007, 6:56 PM CDT (23:56 UTC)
Expired: Apr 21, 2007, 7:30 PM CDT
In force: 34 min
Issued by: NWS Lubbock, TX
Area: Counties, with a storm outline in the text

County Lamb County, TX

The radar

The Lubbock radar (KLBB), 62 km from the middle of the area, began a volume at 23:59 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
Apr 21, 7:00 PM CDT	TORNADO	1 Se Olton, TX	* 1 INJ * TORNADO WITH DAMAGE IN VICINITY OF OLTON ON HIGHWAY 70...BARN DESTROYED...OTHER BUILDINGS DAMAGED...1 INJURED AND 1 MISSING IN OLTON
Apr 21, 7:01 PM CDT	HAIL 1.75	Olton, TX	GOLFBALL SIZE HAIL JUST EAST OF OLTON.
Apr 21, 7:05 PM CDT	HAIL 2.75	Olton, TX	BASEBALL SIZE HAIL JUST EAST OF OLTON

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
Apr 21, 3:44 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.9 hours before the alert went out and 130 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: 516 J/kg
Mixed-layer CIN: -318 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLUB 212356
TORLUB
TXC279-220030-
/O.NEW.KLUB.TO.W.0021.070421T2356Z-070422T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LUBBOCK TX
656 PM CDT SAT APR 21 2007

THE NATIONAL WEATHER SERVICE IN LUBBOCK HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN LAMB COUNTY IN NORTHWEST TEXAS.

* UNTIL 730 PM CDT

* AT 655 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE MOST
  DANGEROUS PART OF THIS STORM WAS LOCATED NEAR OLTON...OR ABOUT 18
  MILES NORTHEAST OF LITTLEFIELD...MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE OLTON.

A TORNADO MAY FORM AT ANY TIME...TAKE COVER NOW ABANDON MOBILE HOMES
AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE
AT 8 0 6 7 4 5 1 2 9 0.

LAT...LON 3431 10210 3408 10209 3403 10215 3403 10216
      3405 10219 3407 10219 3413 10228 3416 10228

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 7:32 PM CDT	Severe Thunderstorm Warning	LUB	Swisher	43 min
Apr 20, 8:15 PM CDT	Severe Thunderstorm Warning	LUB	Swisher	30 min
Apr 21, 5:02 PM CDT	Wind Advisory	LUB	Bailey, Briscoe, Castro, Cochran, Crosby, Floyd and 10 more	6 hr
Apr 21, 5:41 PM CDT	Severe Thunderstorm Warning	LUB	Cochran	32 min
Apr 21, 5:46 PM CDT	Severe Thunderstorm Warning	LUB	Castro	14 min
Apr 21, 5:52 PM CDT	Severe Thunderstorm Warning	LUB	Bailey, Hockley, Lamb	38 min
Apr 21, 6:27 PM CDT	Severe Thunderstorm Warning	LUB	Lamb	48 min
Apr 21, 6:49 PM CDT	Severe Thunderstorm Warning	LUB	Cochran, Hockley	26 min

Nearby

Tornado Warnings in Texas, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.