Alert archive / Texas / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 21, NWS Amarillo, TX

April 20, 2005Gray County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 20, 2005, 6:12 PM CDT for Gray County, Texas. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 20, 2005, 6:12 PM CDT (23:12 UTC)
Expired: Apr 20, 2005, 7:15 PM CDT
In force: 63 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Gray County, TX

The radar

The Amarillo radar (KAMA), 80 km from the middle of the area, began a volume at 23:13 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
Apr 20, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.2 hours before the alert went out and 79 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: 42 J/kg
Mixed-layer CIN: -441 J/kg
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: -53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KAMA 202312
SVRAMA
TXC179-210015-
/O.NEW.KAMA.SV.W.0021.050420T2312Z-050421T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
612 PM CDT WED APR 20 2005

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRAY COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 715 PM CDT

* AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP    
  TO GOLF BALL SIZE.  THIS STORM WAS LOCATED 6 MILES NORTH OF        
  LEFORS...OR ABOUT 7 MILES EAST OF PAMPA...AND MOVING NORTHEAST AT  
  30 MPH. NICKEL SIZE HAIL WAS REPORTED IN LEFORS AT 606 PM.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS

TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE
AT 8 0 6 3 3 5 1 1 2 1.

LAT...LON 3535 10107 3524 10057 3561 10056 3560 10106

$$

KRAMAR

1 follow-up statement

000 
WWUS54 KAMA 202351
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
651 PM CDT WED APR 20 2005

TXC179-210001-
/O.CAN.KAMA.SV.W.0021.000000T0000Z-050421T0015Z/
GRAY TX-
651 PM CDT WED APR 20 2005

...THE SEVERE THUNDERSTORM WARNING FOR GRAY COUNTY IS CANCELLED...

AT 651 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT 
THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE 
WARNED AREA...THUS THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
WEDNESDAY EVENING FOR THE PANHANDLE OF OKLAHOMA AND THE PANHANDLE OF
TEXAS.

LAT...LON 3535 10107 3524 10057 3561 10056 3560 10106

$$

KRAMAR

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 5:21 PM CDT	Severe Thunderstorm Warning	AMA	Gray	54 min
Apr 20, 5:59 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth	61 min
Apr 20, 6:03 PM CDT	Severe Thunderstorm Warning	AMA	Roberts	57 min
Apr 20, 6:15 PM CDT	Severe Thunderstorm Warning	AMA	Wheeler	60 min
Apr 20, 6:22 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill	53 min

Nearby

Severe Thunderstorm Warnings in Texas, 2005 Every severe thunderstorm warning in 2005

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.