Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 58, NWS Brownsville, TX

July 1, 2001Jim Hogg County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Jul 1, 2001, 8:46 PM CDT for Jim Hogg County, Texas. It was in force for 44 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: Jul 1, 2001, 8:46 PM CDT (01:46 UTC)
Expired: Jul 1, 2001, 9:30 PM CDT
In force: 44 min
Issued by: NWS Brownsville, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Jim Hogg County, TX

The radar

The Corpus Christi radar (KCRP), 144 km from the middle of the area, began a volume at 01:50 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 00:00Z, 1.8 hours before the alert went out and 156 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: 343 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1793 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 44 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.

000 
WUUS54 KBRO 020147
SVRBRO

TXC247-020230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
846 PM CDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JIM HOGG COUNTY IN DEEP SOUTH TEXAS

* UNTIL 930 PM CDT.

* AT 847 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  SEVERE THUNDERSTORM 7 MILES SOUTH OF HEBBRONVILLE...MOVING NORTH   
  AT 10 MPH. THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE DIME       
  SIZE HAIL... AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   HEBBRONVILLE BY 900 PM.

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.

THIS IS A DANGEROUS STORM...CAPABLE OF PRODUCING VERY LARGE HAIL AND
DAMAGING WINDS. IF YOU ARE IN ITS PATH...SEEK SAFE SHELTER
IMMEDIATELY!

LAT...LON 2703 9891 2694 9864 2740 9851 2743 9897

$$

MWM

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 Jul 1, 8:40 PM CDT, 6 minutes earlier.

Area forecast discussion, Jul 1, 8:40 PM CDT, 6 minutes before

DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
840 PM CDT SUN JUL 1 2001

TSTMS CONTINUE TO FIRE ALONG EARLIER BOUNDARIES OVER WRN PART OF
CWA THIS EVENING. SVR IN EFFECT FOR JIM HOGG COUNTY WHERE BOUNDARIES
HAVE INTERSECTED AND TRIGGERED RAPID DEVELOPMENT. OTHER TSTMS
RE-FIRING ALONG RIO GRANDE S OF ROMA AND MISSION. ONGOING FORECAST
CONTAINS 30 PCT POPS FOR TONIGHT AND WILL LEAVE INTACT. EXPECT
ACTIVITY TO DIMINISH WITH TIME OVERNIGHT AS LOSS OF DAYTIME HEATING
CONTINUES. UPPER LOW NOW ENTRENCHED OVER REGION TO KEEP CONVECTIVE
THREAT NEXT COUPLE DAYS AT LEAST. PEAK OF BUILDUPS LIKELY TO BE IN
AFTERNOON AND EVENING HOURS WHEN HEATING...SEABREEZE BOUNDARY AND
OTHER REMAINING BOUNDARIES COME INTO PLAY THE MOST. WILL NOT UPDATE
ZONE PACKAGE THIS EVENING AS FORECAST HAS THINGS WELL IN HAND.

SYNOPTIC-MARINE...57-KN / MESO-AVIATION...55-MM

INTERNET ADDRESS...WWW.SRH.NOAA.GOV/BRO

.BRO.\..NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 7:32 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg	43 min
Jul 1, 8:18 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg	27 min
Jul 2, 7:52 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	38 min
Jul 2, 8:42 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	63 min
Jul 2, 1:57 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	63 min

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; radar from the NEXRAD Level II archive.