Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Amarillo, TX

April 2, 2012Hansford County, Ochiltree County, Texas; Texas County, Oklahoma

NWS Amarillo, TX issued this severe thunderstorm warning at Apr 2, 2012, 6:41 PM CDT for Hansford County, Ochiltree County, Texas; Texas County, Oklahoma. It was in force for 64 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 2, 2012, 6:41 PM CDT (23:41 UTC)
Expired
Apr 2, 2012, 7:45 PM CDT
In force
64 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon

Counties Texas County, OK, Hansford County, TX, Ochiltree County, TX

The radar

The Amarillo radar (KAMA), 155 km from the middle of the area, began a volume at 23:43 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.

IssuedProductOfficeLasted
Apr 2, 3:37 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.7 hours before the alert went out and 155 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-pSkew-T log-p diagram, Amarillo Airport, TX at 12:00Z on 2012-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2012-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -91 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4598 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-91 m²/s²
0-3 km storm-relative helicity
67 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.

447 
WUUS54 KAMA 022341
SVRAMA
OKC139-TXC195-357-030045-
/O.NEW.KAMA.SV.W.0021.120402T2341Z-120403T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
641 PM CDT MON APR 2 2012

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN TEXAS COUNTY IN THE PANHANDLE OF OKLAHOMA
  NORTHEASTERN HANSFORD COUNTY IN THE PANHANDLE OF TEXAS
  NORTHWESTERN OCHILTREE COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 745 PM CDT

* AT 638 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 NEAR WAKA...OR ABOUT 12 MILES NORTHEAST OF SPEARMAN...
  MOVING NORTHWEST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARDESTY...
  WAKA...
  OPTIMA...
  FARNSWORTH...
  ADAMS...

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 3674 10153 3687 10112 3629 10089 3620 10108
TIME...MOT...LOC 2341Z 151DEG 25KT 3632 10104

$$

KJS
1 follow-up statement
723 
WWUS54 KAMA 030004
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
704 PM CDT MON APR 2 2012

OKC139-TXC195-357-030045-
/O.CON.KAMA.SV.W.0021.000000T0000Z-120403T0045Z/
TEXAS OK-HANSFORD TX-OCHILTREE TX-
704 PM CDT MON APR 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHWESTERN OCHILTREE...NORTHEASTERN HANSFORD AND SOUTHEASTERN
TEXAS COUNTIES...

AT 702 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 NEAR WAKA...OR ABOUT 11 MILES EAST OF SPEARMAN...MOVING
NORTHWEST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
OPTIMA...GUYMON AND ADAMS.

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

LAT...LON 3674 10153 3687 10112 3629 10089 3620 10108
TIME...MOT...LOC 0004Z 151DEG 25KT 3624 10101

$$

KJS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 4:35 AM CDTRed Flag WarningAMAArmstrong, Carson, Deaf Smith, Oldham, Potter, Randall16 hr
Apr 2, 9:22 AM CDTWind AdvisoryAMADallam, Hartley, Sherman19 hr
Apr 2, 6:06 PM CDTSevere Thunderstorm WarningAMABeaver, Texas54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012Severe Thunderstorm Warnings in Oklahoma, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.