Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 21, NWS Brownsville, TX

May 21, 2001Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 21, 2001, 8:01 PM CDT for Hidalgo County, Starr County, Texas. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2001, 8:01 PM CDT (01:01 UTC)
Expired: May 21, 2001, 9:00 PM CDT
In force: 59 min
Issued by: NWS Brownsville, TX
Area: Whole counties

Counties Hidalgo County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 121 km from the middle of the area, began a volume at 01:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 21, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 1.0 hours before the alert went out and 124 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: 2941 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: -47 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

795 
WUUS54 KBRO 220103
SVRBRO
TXC215-427-220200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
801 PM CDT MON MAY 21 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS
  SOUTHEASTERN STARR COUNTY IN DEEP SOUTH TEXAS

* UNTIL 900 PM CDT

* AT 800 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
SEVERE THUNDERSTORMS OVER STARR COUNTY AND ADJACENT MEXICO. MOVEMENT 
WAS NORTHEAST AT 20 MPH. THIS SEVERE THUNDERSTORM WILL LIKELY 
PRODUCE HAIL TO THE SIZE OF QUARTERS...AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   GARCIASVILLE BY 810 PM CDT.
   AND NEAR MISSION BY 840 PM CDT.

$$

LAT...LON 2634 9885 2602 9854 2626 9807 2662 9856

PHILO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 7:13 PM CDT	Tornado Warning	BRO	Brooks, Hidalgo, Kenedy	62 min
May 21, 7:19 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	56 min
May 21, 7:50 PM CDT	Flash Flood Warning	BRO	Starr	3 hr
May 21, 8:44 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	61 min
May 21, 9:06 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	54 min
May 21, 9:14 PM CDT	Tornado Warning	BRO	Hidalgo	46 min
May 21, 10:40 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg	50 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.