Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 39, NWS Amarillo, TX

April 10, 2012Dallam County, Texas; Cimarron County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 10, 2012, 9:28 PM CDT for Dallam County, Texas; Cimarron County, Oklahoma. It was in force for 40 min. 1 report 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 10, 2012, 9:28 PM CDT (02:28 UTC)
Expired: Apr 10, 2012, 10:08 PM CDT
In force: 40 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

Counties Cimarron County, OK, Dallam County, TX

The radar

The Amarillo radar (KAMA), 149 km from the middle of the area, began a volume at 02:29 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 10, 9:35 PM CDT	HAIL 1	20 Ene Texline, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.5 hours before the alert went out and 150 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: 756 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1849 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 319 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

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

059 
WUUS54 KAMA 110228
SVRAMA
OKC025-TXC111-110330-
/O.NEW.KAMA.SV.W.0039.120411T0228Z-120411T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
928 PM CDT TUE APR 10 2012

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL CIMARRON COUNTY IN THE PANHANDLE OF OKLAHOMA
  DALLAM COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 1030 PM CDT

* AT 925 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED 21 MILES NORTH OF WARE...OR ABOUT 21 MILES SOUTHWEST OF
  BOISE CITY...MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WARE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3629 10230 3612 10281 3653 10287 3660 10266
TIME...MOT...LOC 0228Z 337DEG 10KT 3648 10272

$$

JOHNSON

2 follow-up statements

667 
WWUS54 KAMA 110241
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
941 PM CDT TUE APR 10 2012

OKC025-TXC111-110330-
/O.CON.KAMA.SV.W.0039.000000T0000Z-120411T0330Z/
CIMARRON OK-DALLAM TX-
941 PM CDT TUE APR 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR CENTRAL DALLAM AND SOUTH CENTRAL CIMARRON COUNTIES...

AT 938 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 19 MILES NORTH OF WARE...OR ABOUT 22 MILES SOUTHWEST OF BOISE
CITY...MOVING SOUTHEAST AT 10 MPH.

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

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

LAT...LON 3656 10261 3629 10230 3612 10281 3649 10286
TIME...MOT...LOC 0242Z 337DEG 10KT 3644 10270

$$

JOHNSON

485 
WWUS54 KAMA 110308
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
1008 PM CDT TUE APR 10 2012

OKC025-TXC111-110318-
/O.CAN.KAMA.SV.W.0039.000000T0000Z-120411T0330Z/
CIMARRON OK-DALLAM TX-
1008 PM CDT TUE APR 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL DALLAM AND SOUTH
CENTRAL CIMARRON COUNTIES IS CANCELLED...

AT 1008 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAD
WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING IS CANCELLED.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THAT THE SEVERE
THUNDERSTORM HAS WEAKENED AND WAS NO LONGER SEVERE...THUS THE SEVERE
THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 3656 10261 3629 10230 3612 10281 3649 10286
TIME...MOT...LOC 0308Z 337DEG 10KT 3637 10266

$$

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:09 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	66 min
Apr 10, 7:38 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	52 min
Apr 10, 8:25 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter	33 min
Apr 10, 8:31 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	59 min
Apr 10, 8:43 PM CDT	Areal Flood Advisory	AMA	Potter	3 hr
Apr 10, 8:57 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Sherman	63 min
Apr 10, 11:08 PM CDT	Severe Thunderstorm Warning	AMA	Hansford, Hutchinson, Ochiltree, Roberts	67 min
Apr 11, 2:28 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	62 min
Apr 11, 3:03 PM CDT	Areal Flood Advisory	AMA	Moore, Potter	3 hr
Apr 11, 3:27 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	63 min
Apr 11, 4:16 PM CDT	Areal Flood Advisory	AMA	Dallam, Hartley, Moore, Sherman	3 hr
Apr 11, 4:26 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	64 min
Apr 11, 5:25 PM CDT	Flash Flood Warning	AMA	Moore, Potter	3 hr
Apr 11, 5:29 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	61 min
Apr 11, 5:50 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Sherman	55 min
Apr 11, 6:26 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	64 min
Apr 11, 6:36 PM CDT	Flash Flood Warning	AMA	Carson, Hutchinson	4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Severe Thunderstorm Warnings in Oklahoma, 2012 Every severe thunderstorm warning in 2012

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.