Alert archive / Texas / Tornado Warnings in 2002

Tornado Warning 15, NWS Amarillo, TX

May 11, 2002Oldham County, Texas

NWS Amarillo, TX issued this tornado warning at May 11, 2002, 1:07 AM CDT for Oldham County, Texas. It was in force for 38 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: May 11, 2002, 1:07 AM CDT (06:07 UTC)
Expired: May 11, 2002, 1:45 AM CDT
In force: 38 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Oldham County, TX

The radar

The Amarillo radar (KAMA), 75 km from the middle of the area, began a volume at 06:06 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 11, 1:20 AM CDT	Hail 1.75	Boys Ranch, TX
May 11, 1:30 AM CDT	Hail 1.75	Boys Ranch, 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 10, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 6.1 hours before the alert went out and 76 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: 83 J/kg
Mixed-layer CIN: -459 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KAMA 110607
TORAMA
TXC359-110645-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
105 AM CDT SAT MAY 11 2002

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN OLDHAM COUNTY IN THE TEXAS PANHANDLE

* UNTIL 145 AM CDT

* AT 105 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS
  PORTION OF THE STORM WAS LOCATED 11 MILES WEST OF BOYS RANCH...OR
  ABOUT 16 MILES NORTH OF VEGA...MOVING EAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  BOYS RANCH

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU
SEE OR HEAR THE TORNADO-IT MAY BE TOO LATE. TAKE COVER NOW

A TORNADO MAY FORM AT ANY TIME-TAKE COVER NOW ABANDON MOBILE HOMES
AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS. 
LAT...LON 3558 10266 3535 10263 3539 10217 3562 10219

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 10:39 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith	51 min
May 10, 11:07 PM CDT	Severe Thunderstorm Warning	AMA	Hartley	38 min
May 10, 11:24 PM CDT	Severe Thunderstorm Warning	AMA	Potter, Randall	51 min
May 10, 11:59 PM CDT	Tornado Warning	AMA	Oldham	46 min
May 11, 12:01 AM CDT	Severe Thunderstorm Warning	AMA	Hutchinson	59 min
May 11, 12:24 AM CDT	Severe Thunderstorm Warning	AMA	Hartley	36 min
May 11, 12:31 AM CDT	Severe Thunderstorm Warning	AMA	Hansford, Ochiltree	59 min
May 11, 12:44 AM CDT	Severe Thunderstorm Warning	AMA	Oldham	46 min
May 11, 1:22 AM CDT	Severe Thunderstorm Warning	AMA	Hartley, Moore	53 min
May 11, 1:50 AM CDT	Tornado Warning	AMA	Moore	40 min

Nearby

Tornado Warnings in Texas, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.