Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 49, NWS Amarillo, TX

July 29, 2011Carson County, Gray County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Jul 29, 2011, 3:49 PM CDT for Carson County, Gray County, Texas. It was in force for 39 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
Jul 29, 2011, 3:49 PM CDT (20:49 UTC)
Expired
Jul 29, 2011, 4:28 PM CDT
In force
39 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon

Counties Carson County, TX, Gray County, TX

The radar

The Amarillo radar (KAMA), 47 km from the middle of the area, began a volume at 20:53 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 nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.8 hours before the alert went out and 46 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 2011-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 509 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2011-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.1939Sfc1 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
509 J/kg
Mixed-layer CIN
-219 J/kg
Mixed-layer LCL
1469 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
13 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.

177 
WUUS54 KAMA 292049
SVRAMA
TXC065-179-292145-
/O.NEW.KAMA.SV.W.0049.110729T2049Z-110729T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
349 PM CDT FRI JUL 29 2011

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

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

* UNTIL 445 PM CDT

* AT 348 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS
  IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR GROOM...OR ABOUT
  17 MILES EAST OF PANHANDLE...MOVING WEST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GROOM...
  PANHANDLE...
  WHITE DEER...

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 3522 10148 3552 10135 3537 10091 3518 10102
      3518 10110 3518 10112 3518 10113 3518 10114
TIME...MOT...LOC 2049Z 110DEG 9KT 3528 10110

$$

KJS
2 follow-up statements
222 
WWUS54 KAMA 292105
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
405 PM CDT FRI JUL 29 2011

TXC065-179-292145-
/O.CON.KAMA.SV.W.0049.000000T0000Z-110729T2145Z/
GRAY TX-CARSON TX-
405 PM CDT FRI JUL 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR EASTERN CARSON AND SOUTHWESTERN GRAY COUNTIES...

AT 402 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES NORTH OF GROOM...OR
ABOUT 14 MILES EAST OF PANHANDLE...MOVING WEST 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 3522 10148 3552 10135 3537 10091 3518 10102
      3518 10110 3518 10112 3518 10113 3518 10114
TIME...MOT...LOC 2105Z 110DEG 9KT 3529 10115

$$

KJS
763 
WWUS54 KAMA 292128
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
428 PM CDT FRI JUL 29 2011

TXC065-179-292138-
/O.CAN.KAMA.SV.W.0049.000000T0000Z-110729T2145Z/
GRAY TX-CARSON TX-
428 PM CDT FRI JUL 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CARSON AND
SOUTHWESTERN GRAY COUNTIES IS CANCELLED...

AT 428 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.

LAT...LON 3522 10148 3552 10135 3537 10091 3518 10102
      3518 10110 3518 10112 3518 10113 3518 10114
TIME...MOT...LOC 2128Z 110DEG 9KT 3531 10122

$$

KJS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 4:02 PM CDTSevere Thunderstorm WarningAMARoberts34 min
Jul 29, 6:12 PM CDTSevere Thunderstorm WarningAMAOldham, Potter48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011

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.