Alert archive / Texas / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 63, NWS Austin/San Antonio, TX

May 11, 1992Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 11, 1992, 8:51 PM CDT for Williamson County, Texas. It was in force for 54 min. 2 reports 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: May 11, 1992, 8:51 PM CDT (01:51 UTC)
Expired: May 11, 1992, 9:45 PM CDT
In force: 54 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Williamson County, TX

What was reported inside it

Time	Report	Where	Remark
May 11, 9:00 PM CDT	Hail 1.75	Williamson, TX
May 11, 9:50 PM CDT	Hail 1.75	Williamson, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Stephenville/Cla, TX (KSEP), launched 00:00Z, 1.9 hours before the alert went out and 181 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: 768 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 2395 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 202 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 
TTAA00 KAUS 120152
SVRAUS
TXC491-120245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
851 PM CDT MON MAY 11 1992
 
THE NATIONAL WEATHER SERVICE IN AUSTIN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  945 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...NORTHERN WILLIAMSON COUNTY
 
AT 847 PM RADAR INDICATED A SEVERE THUNDERSTORM NEAR FLORENCE IN
NORTHERN WILLIAMSON COUNTY. PERSONS IN FLORENCE AND JARRELL ARE IN THE
PATH OF THIS STORM.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALMs BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 9:42 PM CDT	Tornado Warning	EWX	Williamson	33 min
May 12, 4:22 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	53 min
May 12, 5:14 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	61 min
May 12, 5:56 PM CDT	Severe Thunderstorm Warning	EWX	Hays	49 min
May 12, 6:50 PM CDT	Severe Thunderstorm Warning	EWX	Hays	55 min

Nearby

Severe Thunderstorm Warnings in Texas, 1992 Every severe thunderstorm warning in 1992

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.