Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 111, NWS Austin/San Antonio, TX

April 30, 2000Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 30, 2000, 11:38 PM CDT for Val Verde County, Texas. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 30, 2000, 11:38 PM CDT (04:38 UTC)
Expired: May 1, 2000, 12:40 AM CDT
In force: 62 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Val Verde County, TX

What was reported inside it

Time	Report	Where	Remark
May 1, 12:35 AM CDT	Hail 1	Comstock, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 4.6 hours before the alert went out and 66 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: 2709 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 2069 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 010437
SVRSAT
TXC465-010540-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1138 PM CDT SUN APR 30 2000

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  VAL VERDE COUNTY

* UNTIL 1240 AM CDT

* AT 1135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER NORTHERN VAL VERDE COUNTY...MOVING        
  SOUTHEAST AT 25 MPH.  THIS THUNDERSTORM IS INCREASING IN SIZE
  AS IT MOVES SOUTHEAST.   

LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM.  IF YOU ARE IN 
THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A 
SUBSTANTIAL SHELTER.

PERIODS OF HEAVY RAIN AND STRONG WIND IS ALSO POSSIBLE WITH THIS
THUNDERSTORM...AS IT MOVES SOUTHEAST. 

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY 
AWAY FROM HIGH AREAS...METAL OBJECTS...AND TALL ISOLATED TREES. MOVE 
INDOORS IF POSSIBLE BUT STAY AWAY FROM WINDOWS AND DOORS AND AVOID 
USING THE TELEPHONE UNLESS IT IS AN EMERGENCY.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 30, 9:24 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	51 min
Apr 30, 9:58 PM CDT	Severe Thunderstorm Warning	EWX	Bandera	62 min
Apr 30, 10:11 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	64 min
May 1, 12:30 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	60 min
May 1, 1:40 AM CDT	Flash Flood Warning	EWX	Edwards, Kerr, Real	110 min
May 1, 4:29 AM CDT	Severe Thunderstorm Warning	EWX	Bexar, Guadalupe	61 min
May 1, 6:41 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie	34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000 Every severe thunderstorm warning in 2000

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.