Alert archive / Texas / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 84, NWS Austin/San Antonio, TX

May 24, 2001Gillespie County, Llano County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 24, 2001, 8:54 PM CDT for Gillespie County, Llano County, Texas. It was in force for 51 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: May 24, 2001, 8:54 PM CDT (01:54 UTC)
Expired: May 24, 2001, 9:45 PM CDT
In force: 51 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Gillespie County, TX, Llano County, TX

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 24, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.9 hours before the alert went out and 238 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: 813 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 3306 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 250155
SVRSAT

TXC171-299-250245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
854 PM CDT THU MAY 24 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 945 PM CDT

* AT 854 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ENCHANTED ROCK STATE PARK...OR ABOUT 17
  MILES NORTH OF FREDERICKSBURG...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
OVER RURAL GILLESPIE AND LLANO COUNTIES THROUGH 910 PM
WILLOW CITY AT 910 PM

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  ENCHANTED ROCK STATE PARK
  WILLOW CITY

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.


LAT...LON 3052 9892 3026 9882 3023 9861 3052 9861
          3079 9844

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 24, 7:50 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, May 24, 7:50 PM CDT, 1 hour 4 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
750 PM CDT THU MAY 24 2001

UPDATED ZONES TO REFLECT SEVERE THUNDERSTORM WATCH UNITL 2 AM
FRIDAY...NO OTHER CHANGES AS ONGOING FORECAST ON TRACK.
04/06/JB

PREVIOUS DISCUSSION
UPDATED ZONES TO REFLECT SEVERE THUNDERSTORM WATCH UNTIL 11 PM...
NO OTHER CHANGES AS ONGOING FORECAST ON TRACK.
04/06/JB

AFTERNOON DISCUSSION...
COLD FRONT NOW PUSHING INTO THE COUNTY WARNING AND FORECAST AREA
WITH FALLING DEWPOINTS OVER CENTRAL TEXAS. THEREFORE, THE CHANCE OF
RAIN OVER THE AUSTIN AREA APPEARS LESS THAN PREVIOUSLY ASSESSED.
WILL KEEP POPS IN THE 10 TO 20 RANGE ACROSS NORTHERN SECTIONS. WITH
NO SIGNIFICANT BUILDUPS NEAR THE AREA, AM LEANING TOWARD SLIGHT
CHANCE POPS ALL OTHER AREAS EXCEPT SOUTHEAST. ONCE THUNDERSTORMS
BEGIN, SOME ENHANCEMENT IS POSSIBLE AS AN UPSTREAM SHORTWAVE
APPROACHES.

TOMORROW, ANOTHER SEVERE WEATHER EVENT SHOULD UNFOLD AS THE AREA
WILL FIND ITSELF IN THE ENTRANCE REGION OF AN UPPER JET WHILE WEAK
SHORTWAVE DISTURBANCES PASS DOWN IN NW FLOW. 12Z MODEL RUNS CONTINUE
THE TREND OF A WEAKER COLD FRONT AND EARLIER RETREAT OF THE FRONTAL
ZONE SATURDAY INTO SUNDAY. WILL TAKE AN AVN/ETA MIX TO END THE
CHANCE OF RAIN AFTER SATURDAY NIGHT WITH THE UPPER RIDGE TAKING HOLD
SUNDAY. ON TEMPS, WILL FAVOR COOLER PREVIOUS FORECAST NUMBERS OVER
MODEL GUIDANCE WHICH APPEARS TOO WARM AT NIGHT. THE EXTENDED
FORECAST WILL BE LEFT MUCH THE SAME AS MODEL CONSENSUS KEEPS AN
UPPER RIDGE OVER SOUTH TX.

PRELIMINARY NUMBERS...
AUS 60/83/62/88 2333
DRT 69/94/70/97 2331
SAT 65/85/66/89 2332

.EWX...NONE.

18/2/23

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 24, 7:45 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie	60 min
May 24, 7:48 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	57 min
May 24, 8:04 PM CDT	Tornado Warning	EWX	Edwards	41 min
May 24, 8:16 PM CDT	Severe Thunderstorm Warning	EWX	Real	44 min
May 24, 8:42 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	63 min
May 24, 9:17 PM CDT	Severe Thunderstorm Warning	EWX	Medina	58 min
May 24, 9:19 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	56 min
May 24, 9:41 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano	64 min
May 24, 9:46 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde, Zavala	59 min
May 24, 10:30 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina	60 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.