Alert archive / Texas / Tornado Warnings in 2000

Tornado Warning 34, NWS Houston/Galveston, TX

November 12, 2000Colorado County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Nov 12, 2000, 4:57 PM CST for Colorado County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Nov 12, 2000, 4:57 PM CST (22:57 UTC)
Expired: Nov 12, 2000, 5:30 PM CST
In force: 33 min
Issued by: NWS Houston/Galveston, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Colorado County, TX

The radar

The Houston radar (KHGX), 137 km from the middle of the area, began a volume at 22:58 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.

Issued	Product	Office	Lasted
Nov 12, 1:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 11.0 hours before the alert went out and 228 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: 622 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KHGX 122259
TORHOU

TXC089-122330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
457 PM CST SUN NOV 12 2000

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A

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

* UNTIL 530 PM CST

* AT 453 PM CST...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO 5 MILES NORTH OF ROCK ISLAND...MOVING EAST AT
  30 MPH.

* LOCATIONS IN THE PATH OF THE TORNADO INCLUDE...
  EAGLE LAKE
  ATTWATER PRAIRIE CHICKEN WILDLIFE REFUGE
  HIGHWAY 71 BETWEEN ALTAIR AND COLUMBUS
  HIGHWAY 102 BETWEEN ALLEYTON AND EAGLE LAKE 
 
MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON YOUR CAR
OR MOBILE HOME FOR A STRONG SHELTER NOW!

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

LAT...LON 2968 9663 2951 9659 2959 9624 2975 9632

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 12, 1:10 PM CST	Tornado Warning	HGX	Austin, Colorado	65 min
Nov 12, 1:42 PM CST	Tornado Warning	HGX	Colorado, Jackson, Wharton	63 min
Nov 12, 2:52 PM CST	Severe Thunderstorm Warning	HGX	Austin, Colorado, Washington	53 min
Nov 12, 3:09 PM CST	Tornado Warning	HGX	Austin, Colorado, Washington	36 min
Nov 12, 3:41 PM CST	Tornado Warning	HGX	Austin, Colorado	49 min
Nov 12, 3:49 PM CST	Tornado Warning	HGX	Waller	56 min
Nov 12, 4:11 PM CST	Tornado Warning	HGX	Colorado	49 min
Nov 12, 4:11 PM CST	Tornado Warning	HGX	Harris, Montgomery	64 min
Nov 12, 4:25 PM CST	Tornado Warning	HGX	Austin	35 min
Nov 12, 5:12 PM CST	Tornado Warning	HGX	Waller	48 min
Nov 12, 5:29 PM CST	Severe Thunderstorm Warning	HGX	Austin, Colorado, Wharton	31 min

Nearby

Tornado Warnings in Texas, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.