Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 252, NWS Amarillo, TX

August 17, 2009Armstrong County, Carson County, Gray County, Texas

NWS Amarillo, TX issued this severe thunderstorm warning at Aug 17, 2009, 4:59 PM CDT for Armstrong County, Carson County, Gray County, Texas. It was in force for 61 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
Aug 17, 2009, 4:59 PM CDT (21:59 UTC)
Expired
Aug 17, 2009, 6:00 PM CDT
In force
61 min
Issued by
NWS Amarillo, TX
Area
Storm-based polygon

Counties Armstrong County, TX, Carson County, TX, Gray County, TX

The radar

The Amarillo radar (KAMA), 37 km from the middle of the area, began a volume at 22:02 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

TimeReportWhereRemark
Aug 17, 5:25 PM CDTHAIL 0.7510 S Panhandle, TXIN CONWAY TX.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 17, 3:18 PM CDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.0 hours before the alert went out and 37 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 2009-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1647 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 2009-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
1647 J/kg
Mixed-layer CIN
-184 J/kg
Mixed-layer LCL
1758 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
66 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 
WUUS54 KAMA 172159
SVRAMA
TXC011-065-179-172300-
/O.NEW.KAMA.SV.W.0252.090817T2159Z-090817T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
459 PM CDT MON AUG 17 2009

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL ARMSTRONG COUNTY IN THE PANHANDLE OF TEXAS
  CARSON COUNTY IN THE PANHANDLE OF TEXAS
  WESTERN GRAY COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 600 PM CDT

* AT 458 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND     
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8      
  MILES EAST OF PANHANDLE...MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  KINGSMILL...
  WHITE DEER...
  PANHANDLE...
  SKELLYTOWN...
  WASHBURN...

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 86 AND 109.

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 3534 10161 3563 10131 3563 10102 3529 10092
      3506 10156
TIME...MOT...LOC 2158Z 232DEG 16KT 3531 10125

$$

JOHNSON

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 2:57 PM CDTSevere Thunderstorm WarningAMACarson, Potter, Randall63 min
Aug 17, 3:29 PM CDTSevere Thunderstorm WarningAMACarson, Gray91 min
Aug 17, 4:10 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Potter, Randall65 min
Aug 17, 4:23 PM CDTSevere Thunderstorm WarningAMADeaf Smith, Oldham, Potter, Randall67 min
Aug 17, 4:36 PM CDTAreal Flood AdvisoryAMAArmstrong, Carson, Potter, Randall3 hr
Aug 17, 4:44 PM CDTSevere Thunderstorm WarningAMAOldham, Potter45 min
Aug 17, 5:11 PM CDTSevere Thunderstorm WarningAMACarson, Potter64 min
Aug 17, 5:17 PM CDTSevere Thunderstorm WarningAMAHansford, Hutchinson, Ochiltree, Roberts58 min
Aug 17, 5:21 PM CDTSevere Thunderstorm WarningAMAHartley, Moore54 min
Aug 17, 5:42 PM CDTSevere Thunderstorm WarningAMAHansford, Ochiltree63 min
Aug 17, 5:45 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray60 min
Aug 17, 6:05 PM CDTSevere Thunderstorm WarningAMADonley, Gray55 min
Aug 17, 6:26 PM CDTSevere Thunderstorm WarningAMAHemphill, Wheeler64 min
Aug 17, 6:39 PM CDTSevere Thunderstorm WarningAMADallam66 min
Aug 17, 6:43 PM CDTSevere Thunderstorm WarningAMALipscomb, Ochiltree62 min
Aug 17, 6:46 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Donley, Gray59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

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.