Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 74, NWS Brownsville, TX

October 6, 2001Cameron County, Hidalgo County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Oct 6, 2001, 3:08 AM 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: Oct 6, 2001, 3:08 AM CDT (08:08 UTC)
Expired: Oct 6, 2001, 4:08 AM 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 nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 8.1 hours before the alert went out and 72 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: 2733 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

130 
WUUS54 KBRO 060808
SVRBRO
TXC061-215-489-060908-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
308 AM CDT SAT OCT 6 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 408 AM CDT

* AT 304 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR EDINBURG...MOVING EAST AT 25 MPH. THIS
  SEVERE THUNDERSTORM WILL LIKELY PRODUCE DIME SIZE HAIL... AND WINDS
  IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   ELSA BY 315 AM CDT.
   EDCOUCH BY 320 AM CDT.
   SANTA ROSA...SEBASTIAN...LYFORD BY 340 AM CDT.
   COMBES BY 355 AM CDT.
   RIO HONDO BY 400 AM CDT.

LAT...LON 2650 9808 2616 9810 2623 9750 2659 9755

PHILO

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 5, 8:30 PM CDT, 6 hours 38 minutes earlier.

Area forecast discussion, Oct 5, 8:30 PM CDT, 6 hours 38 minutes before

DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
830 PM CDT FRI OCT 5 2001

WILL NOT MAKE ANY CHANGES TO ONGOING FORECAST.  MOSTLY CLEAR SKIES
THIS EVENING OVER DEEP SOUTH TEXAS AS WATER VAPOR IMAGERY SHOWS
PLENTY OF DRY AIR IN THE UPPER LEVELS OF THE ATMOSPHERE.  EVENING
BRO SOUNDING CONFIRMS THIS AS PWAT VALUES DROPPED TO 1.62 INCHES.
THE WEST AND SOUTHWEST WINDS NEAR 850 MB HAVE INCREASED THE
CAP...MAKING IT DIFFICULT TO SUSTAIN CONVECTION.  A FEW STORMS THAT
HAVE FIRED JUST TO THE NORTH OF OUR CWA HAVE QUICKLY DISSIPATED AS
THERMODYNAMICS NOT STRONG ENOUGH.  WE ARE IN THE RIGHT REAR QUADRANT
OF UPPER JET AND COLD FRONT CONTINUES TO HEAD SOUTH TOWARD OUR
AREA.  THIS COMBINATION MAY STILL BE ENOUGH PUNCH TO BREAK CAP AND
ALLOW FOR CONVECTION OVERNIGHT.  WILL CONTINUE TO MENTION
POSSIBILITY OF SEVERE AS DRY AIR ALOFT MAY AID IN PRODUCING SEVERE
WIND GUSTS.  HAIL PROBABILITIES ARE LOW AS FREEZING LEVEL INCREASED
TO 16KFT.

FRONT IS THROUGH SAN ANTONIO AND IS APPROACHING PLEASANTON ON
HIGHWAY 37.  THE FRONT MOVED THROUGH CENTRAL TEXAS AT ABOUT 20 KNOTS
WHICH WOULD BRING THE FRONT THROUGH THE LOWER RIO GRANDE VALLEY
AROUND 4 AM.   WINDS NOT THAT IMPRESSIVE BEHIND FRONT BUT SOME
STATIONS ARE REPORTING GUSTS OVER 20 KNOTS.  MESO ETA BEGINS TO BACK
WINDS TO NORTHEAST AT 09Z BUT WAITS UNTIL SUNRISE TO BRING STRONGER
NORTH WINDS.  WILL STICK WITH A PREDAWN PASSAGE FOR NOW.

SMALL CRAFT ADVISORIES ARE UP AND WILL LIKELY REMAIN UP THROUGH MOST
OF SATURDAY.  MESO ETA SHOWS WINDS OF 20 TO 25 KNOTS OVER THE GULF
AND BAY BY LATE SATURDAY MORNING.

SYNOPTIC-PUBLIC...YURA (69)
MARINE-AVIATION-MESO...MCGUIRE (55)

.BRO...SCA FOR GMZ130-150-155-170-175.

In the hours before

Special weather statement, Oct 5, 11:33 PM CDT, 3 hours 35 minutes before

TXZ249-060500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1133 PM CDT FRI OCT 5 2001

...STRONG THUNDERSTORM HEADED NEAR HEBBRONVILLE...

AT 1133 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A STRONG
THUNDERSTORM 5 MILES NORTHWEST OF HEBBRONVILLE.  THE STORM IS MOVING
SOUTHEAST AT 20 MPH AND SHOULD PASS OVER HEBBRONVILLE BY 1145 PM.
STRONG GUSTY WINDS NEAR 50 MPH...SMALL HAIL...AND DANGEROUS LIGHTNING
WILL ACCOMPANY THE STORM.

STAY TUNED TO NOAA WEATHER RADIO AND THE NATIONAL WEATHER SERVICE FOR
FURTHER UPDATES.

YURA

Special weather statement, Oct 6, 12:38 AM CDT, 2 hours 30 minutes before

TXZ248-249-252-060630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1238 AM CDT SAT OCT 6 2001

...STRONG THUNDERSTORM HEADED NEAR SOUTHERN ZAPATA COUNTY AND FALCON
LAKE...

AT 1245 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES A
STRONG THUNDERSTORM 5 MILES NORTHWEST OF FALCON LAKE...
MOVING SOUTHEAST AT 20 MPH.  ALTHOUGH THIS STORM APPEARED
SEVERE OVER MEXICO...IT HAS DECREASED IN INTENSITY OVER THE
PAST SEVERAL MINUTES.  HOWEVER...AS THIS STORM MOVES OVER FALCON
LAKE...GUSTY WINDS NEAR 50 MPH...SMALL HAIL...AND FREQUENT
LIGHTNING CAN BE EXPECTED.

STAY TUNED TO NOAA WEATHER RADIO AND THE NATIONAL WEATHER SERVICE FOR
FURTHER UPDATES.

Local storm report, Oct 6, 2:30 AM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
230 AM CDT SAT OCT 6 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0205 AM     SAN ISIDRO               TX    WIND DAMAGE
08/31/01    HIDALGO                        TIN ROOF BLOWN OFF HOUSE
                                           LAW ENFORCEMENT REPORT

Local storm report, Oct 6, 2:40 AM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED COUNTY LOCATION AND DATE...
NATIONAL WEATHER SERVICE BROWNSVILLE TX
240 AM CDT SAT OCT 6 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0205 AM     SAN ISIDRO               TX    WIND DAMAGE
10/06/01    STARR                          TIN ROOF BLOWN OFF HOUSE
                                           LAW ENFORCEMENT REPORT

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 12:48 AM CDT	Special Marine Warning	BRO		72 min
Oct 6, 2:03 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	42 min
Oct 6, 3:36 AM CDT	Special Marine Warning	BRO		3 hr
Oct 6, 3:36 AM CDT	Special Marine Warning	BRO		3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2001 Every severe thunderstorm warning 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.