Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 68, NWS Brownsville, TX

September 2, 2001Kenedy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Sep 2, 2001, 6:30 PM CDT for Kenedy 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 2, 2001, 6:30 PM CDT (23:30 UTC)
Expired
Sep 2, 2001, 7:30 PM CDT
In force
60 min
Issued by
NWS Brownsville, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Kenedy County, TX

The radar

The Corpus Christi radar (KCRP), 81 km from the middle of the area, began a volume at 23:30 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

Corpus Christi, TX (KCRP), launched 12:00Z, 11.5 hours before the alert went out and 84 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, Corpus Christi, TX at 12:00Z on 2001-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2743 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2001-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
2743 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
5 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.

628 
WUUS54 KBRO 022331
SVRBRO
TXC261-030030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
630 PM CDT SUN SEP 2 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN KENEDY COUNTY IN DEEP SOUTH TEXAS

* UNTIL 730 PM CDT

* AT 628 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 18 MILES SOUTHEAST OF FALFURRIAS...MOVING
  SOUTHWEST AT 5 MPH. THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE
  DIME SIZE HAIL... AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF...  
  WESTERN KENEDY COUNTY.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

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

&&

LAT...LON 2712 9770 2724 9785 2720 9797 2689 9797

CASTILLO

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 Sep 2, 3:00 PM CDT, 3 hours 30 minutes earlier.

Area forecast discussion, Sep 2, 3:00 PM CDT, 3 hours 30 minutes before
DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
300 PM CDT SUN SEP 2 2001

WATER VAPOR IMAGERY IS CURRENTLY DEPICTING A GENERALLY DRIER
ATMOSPHERE OVER SOUTHERN AND EASTERN TEXAS...AS MID-LEVEL SUBSIDENCE
HAS SPREAD OVER THE AREA BEHIND A DEPARTING SHORTWAVE TROUGH.  WITH
THE DEEPER MOISTURE CONFINED TO ADJACENT AREAS OF NORTHERN MEXICO
AND NO SIGNIFICANT SHORTWAVE TROUGHS AT 500 MB FORECASTED TO MOVE
OVER THE AREA THROUGH MONDAY EVENING...FEEL THAT 20 POPS WILL BE
ADEQUATE ACROSS THE ENTIRE AREA.  MAIN REASON FOR LEAVING ISOLATED
POPS IN THE FORECAST FOR TONIGHT AND LABOR DAY IS THAT ANY MINOR
SOURCE OF LIFT IN THE MOIST BOUNDARY LAYER COULD BE SUFFICIENT TO
CREATE A SHOWER OR THUNDERSTORM.  02/12Z ETA ALSO INDICATES A VERY
WEAK 500 MB WAVE APPROACHING THE AREA ON MONDAY MORNING...WHICH MAY
HELP TO DEVELOP A FEW SHOWERS AND THUNDERSTORMS.

HOWEVER...BY LATE MONDAY NIGHT BOTH 02/12Z AVN AND 02/12Z ETA ARE
INDICATING A TRANSITION TO ANOTHER RAIN/THUNDERSTORM EVENT BEGINNING
OVER THE AREA MONDAY NIGHT AND LASTING INTO TUESDAY.  BOTH MODELS
DIG THE 500 MB LONGWAVE TROUGH DIRECTLY TOWARD THE VALLEY BEGINNING
LATE MONDAY NIGHT AND CLOSE-OFF A MID-LEVEL LOW OVER THE EASTERN
HALF OF TEXAS DURING THE DAY ON TUESDAY.  IN ADDITION TO THIS...IT
LOOKS AS IF A STRONG 500 MB SHORTWAVE TROUGH WILL BE MOVING
SOUTHEAST TOWARD THE AREA ON TUESDAY MORNING...HELPING TO ENHANCE
PRECIPITATION ACROSS THE ENTIRE VALLEY.  WILL ONLY INCREASE POPS TO
LOW-END SCATTERED FOR TUESDAY AND TUESDAY NIGHT...BASED ON LOWER
NUMERICAL GUIDANCE...BUT LATER SHIFTS MAY CONSIDER INCREASING POPS
DURING THIS TIME.

IN THE EXTENDED PERIODS...AVN GUIDANCE SHOWS THE 500 MB LOW DRIFTING
NORTH ON WEDNESDAY AND THURSDAY...BEFORE THE OVERALL POSITION OF THE
TROUGH DIGS BACK TO THE SOUTH ON FRIDAY.  HOWEVER...WITH OVERALL
PATTERN NOT FORECASTED TO CHANGE MUCH THROUGH NEXT WEEKEND...WILL
LEAVE IN CHANCE POPS EACH DAY.

MARINE...BUOY 020 CURRENTLY REPORTING A SOUTH WIND AT 10-15 KNOTS
PRODUCING 4-5 FOOT SEAS.  SHOWERS AND THUNDERSTORMS WILL REMAIN IN
THE FORECAST THROUGH THURSDAY...AS A MID-LEVEL TROUGH WILL BE LOCATED
OVER THE AREA.  MO MAJOR CHANGES TO THE CWF AT THIS TIME.

PRELIMINARY NUMBERS:
BRO BB 079/095 079/094 078  20/20/20/30/30
HRL BB 077/096 077/095 076  20/20/20/30/30
MFE BB 078/097 078/096 077  20/20/20/30/30
RGC BB 076/098 076/097 075  20/20/20/30/30
SPI BB 079/088 079/087 078  20/20/20/30/30

SYNOPTIC...DD (65) / AVIATION-MARINE-MESO...PY (69)

.BRO...NONE.

Nearby

Severe Thunderstorm Warnings in Texas, 2001Every 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; radar from the NEXRAD Level II archive.