Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 56, NWS Austin/San Antonio, TX

March 25, 2000Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 25, 2000, 6:52 PM CST for Llano County, Texas. It was in force for 68 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: Mar 25, 2000, 6:52 PM CST (00:52 UTC)
Expired: Mar 25, 2000, 8:00 PM CST
In force: 68 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Llano County, TX

What was reported inside it

Time	Report	Where	Remark
Mar 25, 7:06 PM CST	Hail 0.75	Cherokee, 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

Fort Worth, TX (KFWD), launched 00:00Z, 0.9 hours before the alert went out and 231 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: 887 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1807 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 260108
SVRSAT
TXC299-260200-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
652 PM CST SAT MAR 25 2000

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

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

* UNTIL 8 PM CST

* AT 652 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SAN SABA COUNTY...OR ABOUT 16 MILES NORTH
  OF LLANO...MOVING SOUTHEAST AT 20 MPH.

* LARGE HAIL IS INDICATED WITH THIS STORM.  THE STORM IS MOVING      
  TOWARD THE CITY OF LLANO...AND EVENTUALLY TOWARD THE COMMUNITIES   
  OF KINGSLAND...SUNRISE BEACH AND THE AREA AROUND LAKE LBJ.         
  
* PERSONS IN OR CLOSE TO THESE LOCATIONS SHOULD SEEK SHELTER.

.END/ LAT...LON 3099 9888 3086 9873 3123 9823 3142 9846

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 Mar 25, 2:00 PM CST, 4 hours 52 minutes earlier.

Area forecast discussion, Mar 25, 2:00 PM CST, 4 hours 52 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
200 PM CST SAT MAR 25 2000

SHORT WAVE ROTATING AROUND UPPER RIDGE TONIGHT WILL PRODUCE SHOWERS
AND THUNDERSTORMS ACROSS NORTH TEXAS AND THE NORTHERN PORTIONS OF
SOUTH CENTRAL TEXAS TONIGHT.  WITH SHORT WAVE PASSAGE EARLY
SUNDAY...UPPER FLOW BECOMES MORE NORTHWESTERLY WITH SURFACE FLOW
REMAINING OUT OF THE SOUTH.  DOWNWARD MOMENTUM FROM UPPER FLOW AND
GOOD LOW LEVEL VEERING OF WINDS WILL SURGE TEMPERATURES UPWARD INTO
MID AND UPPER 80S CENTRAL AND EAST...90S WEST AND HILLS.  SURFACE
RIDGING WILL DOMINATE LATE SUNDAY INTO EARLY MONDAY AS GOOD
NORTHWEST FLOW CONTINUES.  UPPER FLOW FLATTENS OUT TUESDAY WITH
INCREASING LOW LEVEL CLOUDS.  NEXT SIGNIFICANT SHORT WAVE PUSHES OUT
OF MEXICO TUESDAY A CHANCE OF RAIN AND THUNDERSTORMS THEN.  DRY...
WESTERLY FLOW WILL DOMINATE WEDNESDAY AND THURSDAY WITH NO RAIN
EXPECTED.

PRELIMS...
AUS 62/86/55/66 3200
SAT 64/88/56/85 1000
DRT 65/94/58/91 0000

.EWX...NONE.

02/06

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 25, 7:26 PM CST	Severe Thunderstorm Warning	EWX	Burnet, Llano	64 min
Mar 26, 4:53 PM CST	Severe Thunderstorm Warning	EWX	Burnet, Llano	67 min
Mar 26, 5:17 PM CST	Severe Thunderstorm Warning	EWX	Blanco	58 min
Mar 26, 5:39 PM CST	Severe Thunderstorm Warning	EWX	Williamson	66 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.