Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 24, NWS Brownsville, TX

September 9, 2001Cameron County, Texas

NWS Brownsville, TX issued this tornado warning at Sep 9, 2001, 6:16 PM CDT for Cameron County, Texas. It was in force for 29 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 9, 2001, 6:16 PM CDT (23:16 UTC)
Expired: Sep 9, 2001, 6:45 PM CDT
In force: 29 min
Issued by: NWS Brownsville, TX
Area: Whole counties

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 27 km from the middle of the area, began a volume at 23:18 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
Sep 9, 6:48 PM CDT	Tornado F0	Harlingen, TX	Several weak landspout-type tornadoes formed along the leading of a stationary front. The tornadoes were weak, small, and short-lived, with none lasting more than five minutes. This particular tornado was reported by an off-duty NWS forecaster.

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 nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 11.3 hours before the alert went out and 29 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: 2923 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 654 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 23 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.

609 
WFUS54 KBRO 092319
TORBRO
TXC061-092345-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
616 PM CDT SUN SEP 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  CAMERON COUNTY IN DEEP SOUTH TEXAS

* UNTIL 645 PM CDT

* AT 610 PM CDT...CAMERON COUNTY SHERIFF DEPARTMENT REPORTED TORNADO 
TOUCHDOWNS ALONG A GUST FRONT LOCATED ACROSS NORTHWEST CAMERON COUNTY 
BETWEEN SANTA ROSA AND PRIMERA.  THESE TORNADOES HAD PRODUCED DAMAGE
IN THAT AREA.  THESE TORNADOES ARE SHORT LIVED BUT CAN PRODUCE 
DAMAGE.

* THE TORNADOES WILL AFFECT HARLINGEN...AND SANTA 
ROSA...PRIMERA...AND COMBES. 

GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE.  SEEK 
SHELTER ON THE LOWEST FLOOR IN AN INTERIOR HALLWAY OR CLOSET. USE 
BLANKETS OR PILLOWS TO COVER YOUR BODY.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 3:01 PM CDT	Flash Flood Warning	BRO	Kenedy	3 hr
Sep 9, 3:01 PM CDT	Flash Flood Warning	BRO	Kenedy	3 hr
Sep 9, 3:22 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	38 min
Sep 9, 3:58 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Hidalgo, Kenedy, Willacy	62 min
Sep 9, 4:16 PM CDT	Tornado Warning	BRO	Willacy	44 min
Sep 9, 4:25 PM CDT	Tornado Warning	BRO	Kenedy	65 min
Sep 9, 5:00 PM CDT	Tornado Warning	BRO	Cameron, Hidalgo, Willacy	60 min
Sep 9, 5:41 PM CDT	Flash Flood Warning	BRO	Kenedy, Willacy	3 hr
Sep 9, 6:11 PM CDT	Flash Flood Warning	BRO	Hidalgo, Kenedy, Willacy	3 hr
Sep 9, 6:50 PM CDT	Tornado Warning	BRO	Cameron	40 min

Nearby

Tornado Warnings in Texas, 2001 Every tornado warning in 2001 Tornadoes in 2001

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.