Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 119, NWS Austin/San Antonio, TX

May 1, 2000Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 1, 2000, 8:58 PM CDT for Williamson County, Texas. It was in force for 47 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: May 1, 2000, 8:58 PM CDT (01:58 UTC)
Expired: May 1, 2000, 9:45 PM CDT
In force: 47 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Williamson County, TX

What was reported inside it

Time	Report	Where	Remark
May 1, 9:15 PM CDT	Hail 1	Taylor, TX	An NWS cooperative observer reported damage to roofs as well as crop damage due to large hail driven by 40 mph winds.

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

Fort Worth, TX (KFWD), launched 00:00Z, 2.0 hours before the alert went out and 248 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1535 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 47 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.

201 
WUUS54 KEWX 020158
SVRSAT
TXC491-020245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
858 PM CDT MON MAY 1 2000

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

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

* UNTIL 945 PM CDT

* AT 856 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF HUTTO...OR ABOUT 5 MILES EAST
  OF ROUND ROCK...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LIBERTY HILL AROUND 905 PM CDT
  GRANGER DAM AND TAYLOR AROUND 915 PM CDT

VERY 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.


LAT...LON 3050 9778 3046 9718 3074 9729 3086 9760

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 1, 2:00 PM CDT, 6 hours 58 minutes earlier.

Area forecast discussion, May 1, 2:00 PM CDT, 6 hours 58 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
200 PM CDT MON MAY 1 2000

SATELLITE PIC HAS AMPLY MID AND HIGH CLOUDS AND MOISTURE CONTINUING
FROM THE WEST OVER THE CWA. RAIN AND CONVECTIVE ACTIVITY OCCURRING
WITH THE MCS LAST NIGHT AND THIS MORNING HAVE MOVED NORTHEAST.
HIGH PRESSURE RIDGE OVER COLORADO IS SLIDING SOUTHEAST...LOW PRESSURE
OVER EASTERN OKLAHOMA/ARKANSAS MOVING NORTHEAST...FRONT OVER HILL
COUNTY BEGINNING TO SLOWLY SLID EASTWARD THROUGH REMAINING CWA. ALL
THIS LEADS ME TO BELIEVE THAT CONVECTIVE ACTIVITY WILL CONTINUE OVER
THE CWA THROUGH TONIGHT AND INTO TUESDAY AS A OVER-RUNNING CONDITIONS
PREVAILS...HOWEVER BRIEF AND ISOLATED IT MAY BE.

FRONT NOT MOVING FAST ENOUGH TO CLEAR THE CWA BEFORE TONIGHT AS GULF
HIGH DEW-POINTS VALUES INFLOW CONTINUES TO SLIDE NORTH UP OVER HILL
COUNTRY COUNTIES AND PORTIONS OF SOUTH CENTRAL SECTIONS. ISOLATED
CONVECTIVE ACTIVITY CONTINUES TO FIRER ALONG BOUNDARIES CREATED FROM
THE EARLIER ACTIVITY.

EXPECT CONVECTIVE ACTIVITY TO INCREASE TONIGHT. SURFACE DEW-POINT
DRIER IN THE WESTERN COUNTIES BUT STILL REMAIN IN THE 60S OVER THE
EASTERN SECTIONS.

WILL KEEP ISOLATED BRIEF LOCALLY HEAVY RAIN AND SEVERE WEATHER THREAT
FOR TONIGHT'S FORECAST. AS SPC STILL HAS SEVERE MENTION FOR ENTIRE
CWA MONDAY NIGHT.

EXTENDED FORECAST...WEDNESDAY THROUGH FRIDAY STILL HAS CWA UNDER
MOSTLY CLOUDY SKIES...20 TO 30 PERCENT POPS.

PRELIMINARY NUMBERS...

DRT 62/81/62/85 3222
AUS 61/74/61/80 4332
SAT 60/76/62/82 4322

.EWX...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 7:06 PM CDT	Severe Thunderstorm Warning	EWX	Blanco	39 min
May 1, 7:15 PM CDT	Severe Thunderstorm Warning	EWX	Llano	45 min
May 1, 7:29 PM CDT	Severe Thunderstorm Warning	EWX	Burnet	61 min
May 1, 8:06 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	54 min
May 1, 10:01 PM CDT	Severe Thunderstorm Warning	EWX	Lee	29 min
May 2, 12:35 AM CDT	Flash Flood Warning	EWX	Williamson	115 min
May 2, 12:53 AM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell, Hays, Lee, Travis	3 hr
May 2, 12:58 AM CDT	Flash Flood Warning	EWX	Kerr	3 hr

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.