Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 35, NWS Houston/Galveston, TX

June 26, 2012Colorado County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Jun 26, 2012, 6:17 PM CDT for Colorado County, Texas. It was in force for 28 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
Jun 26, 2012, 6:17 PM CDT (23:17 UTC)
Expired
Jun 26, 2012, 6:45 PM CDT
In force
28 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

County Colorado County, TX

The radar

The Austin/San Antonio radar (KEWX), 127 km from the middle of the area, began a volume at 23:20 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
Jun 26, 3:22 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 11.3 hours before the alert went out and 216 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, Corpus Christi, TX at 12:00Z on 2012-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 joules per kilogram.LCLLFCEL10008507005003002001001 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, Corpus Christi, TX at 12:00Z on 2012-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
1292 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
1814 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

123 
WFUS54 KHGX 262317
TORHGX
TXC089-262345-
/O.NEW.KHGX.TO.W.0035.120626T2317Z-120626T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
617 PM CDT TUE JUN 26 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN COLORADO COUNTY IN SOUTHEAST TEXAS...

* UNTIL 645 PM CDT

* AT 615 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS TORNADO
  WAS LOCATED 6 MILES NORTHWEST OF ROCK ISLAND... MOVING SOUTHWEST AT
  20 MPH.

* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
  SHERIDAN.

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY AND ASK THEM TO RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE.

LAT...LON 2970 9662 2954 9652 2946 9668 2957 9679
      2957 9683 2958 9684 2961 9685
TIME...MOT...LOC 2317Z 062DEG 16KT 2958 9667

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 3:27 PM CDTSevere Thunderstorm WarningHGXFort Bend, Harris, Waller48 min
Jun 26, 4:17 PM CDTSpecial Weather StatementHGXFort Bend58 min
Jun 26, 4:28 PM CDTSevere Thunderstorm WarningHGXFort Bend, Wharton62 min
Jun 26, 4:38 PM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto, Trinity, Walker67 min
Jun 26, 4:49 PM CDTSpecial Weather StatementHGXWashington41 min
Jun 26, 4:50 PM CDTSpecial Weather StatementHGXAustin40 min
Jun 26, 5:08 PM CDTSevere Thunderstorm WarningHGXHouston41 min
Jun 26, 5:10 PM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Matagorda, Wharton34 min
Jun 26, 5:33 PM CDTSevere Thunderstorm WarningHGXSan Jacinto, Trinity, Walker27 min
Jun 26, 5:42 PM CDTSpecial Weather StatementHGXColorado63 min
Jun 26, 5:56 PM CDTSevere Thunderstorm WarningHGXColorado49 min
Jun 26, 6:16 PM CDTSevere Thunderstorm WarningHGXTrinity29 min

Nearby

Tornado Warnings in Texas, 2012Every tornado warning in 2012Tornadoes 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.