Alert archive / Texas / Tornado Warnings in 2000

Tornado Warning 33, NWS Houston/Galveston, TX

November 12, 2000Austin County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Nov 12, 2000, 4:25 PM CST for Austin County, Texas. It was in force for 35 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Nov 12, 2000, 4:25 PM CST (22:25 UTC)
Expired: Nov 12, 2000, 5:00 PM CST
In force: 35 min
Issued by: NWS Houston/Galveston, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Austin County, TX

The radar

The Houston radar (KHGX), 131 km from the middle of the area, began a volume at 22:28 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

Time	Report	Where	Remark
Nov 12, 4:30 PM CST	Thunderstorm Wind	Bellville, TX	Trees down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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, 10.4 hours before the alert went out and 263 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 122228
TORHOU

TXC015-122300-

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

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

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

* UNTIL 500 PM CST

* AT 423 PM CST...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF
  PRODUCING A TORNADO JUST TO THE WEST OF CAT SPRING...MOVING EAST 
  AT 35 MPH.

* LOCATIONS IN THE PATH OF THE TORNADO INCLUDE...
  CAT SPRING
  BELLVILLE
  SAN FELIPE

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 2999 9652 2983 9637 2978 9611 3004 9614

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, 4:57 PM CST	Tornado Warning	HGX	Colorado	33 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.