Alert archive / Texas / Tornado Warnings in 2001

Tornado Warning 23, NWS Brownsville, TX

September 9, 2001Cameron County, Hidalgo County, Willacy County, Texas

NWS Brownsville, TX issued this tornado warning at Sep 9, 2001, 5:00 PM CDT for Cameron County, Hidalgo County, Willacy County, Texas. It was in force for 60 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
Sep 9, 2001, 5:00 PM CDT (22:00 UTC)
Expired
Sep 9, 2001, 6:00 PM CDT
In force
60 min
Issued by
NWS Brownsville, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Cameron County, TX, Hidalgo County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 76 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.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 10.0 hours before the alert went out and 78 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, Brownsville Intl, TX at 12:00Z on 2001-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2923 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, Brownsville Intl, TX at 12:00Z on 2001-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
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.

118 
WFUS54 KBRO 092205
TORBRO
TXC061-215-489-092300-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS
  EASTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS
  NORTHWESTERN CAMERON COUNTY IN DEEP SOUTH TEXAS

* UNTIL 600 PM CDT

* AT 450 PM CDT...WILLACY COUNTY SHERIFFS DEPARTMENT REPORTED A
  BRIEF TORNADO TOUCHDOWN AT THE INTERSECTION OF 490 AND 1425
  SOUTHWEST OF RAYMONDVILLE.

* THE TORNADO IS EXPECTED TO PASS NEAR...
   LASARA...MONTE ALTO...AND HARGILL...SEBASTIAN.

THE SAFEST PLACE TO BE DURING A TORNADO IN IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR IN AN INTERIOR HALLWAY
OR CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE.

LAT...LON 2654 9788 2652 9808 2621 9807 2623 9782

MILLER/GUERRERO

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 3:01 PM CDTFlash Flood WarningBROKenedy3 hr
Sep 9, 3:01 PM CDTFlash Flood WarningBROKenedy3 hr
Sep 9, 3:22 PM CDTSevere Thunderstorm WarningBROKenedy38 min
Sep 9, 3:58 PM CDTSevere Thunderstorm WarningBROBrooks, Hidalgo, Kenedy, Willacy62 min
Sep 9, 4:16 PM CDTTornado WarningBROWillacy44 min
Sep 9, 4:25 PM CDTTornado WarningBROKenedy65 min
Sep 9, 5:41 PM CDTFlash Flood WarningBROKenedy, Willacy3 hr
Sep 9, 6:11 PM CDTFlash Flood WarningBROHidalgo, Kenedy, Willacy3 hr
Sep 9, 6:16 PM CDTTornado WarningBROCameron29 min
Sep 9, 6:50 PM CDTTornado WarningBROCameron40 min

Nearby

Tornado Warnings in Texas, 2001Every tornado warning in 2001Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.