Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 68, NWS Austin/San Antonio, TX

May 17, 2002Gonzales County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 17, 2002, 4:26 AM CDT for Gonzales County, Texas. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 17, 2002, 4:26 AM CDT (09:26 UTC)
Expired: May 17, 2002, 5:30 AM CDT
In force: 64 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Gonzales County, TX

The radar

The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 09:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 17, 5:00 AM CDT	Thunderstorm Wind	Cost, TX	Severe thunderstorm winds blew roofs off buildings just south of Cost.

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

Corpus Christi, TX (KCRP), launched 00:00Z, 9.4 hours before the alert went out and 187 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: 3134 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 783 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 170926
SVRSAT
TXC177-171030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
423 AM CDT FRI MAY 17 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  GONZALES

* UNTIL 530 AM CDT

* AT 423 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS BUILDING TOWARD AND OVER GONZALES COUNTY FROM
  THE WEST AND SOUTHWEST.

WIND GUSTS OF 40 TO 60 MPH ARE POSSIBLE...ALONG WITH SOME HAIL...AND 
FREQUENT DEADLY LIGHTNING...OVER PARTS OF GONZALES COUNTY.

LAT...LON 2937 9778 2919 9763 2944 9730 2962 9741

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 9:44 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	46 min
May 16, 10:32 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	73 min
May 16, 11:08 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	37 min
May 16, 11:42 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	63 min
May 17, 3:03 AM CDT	Severe Thunderstorm Warning	EWX	Bexar	57 min
May 17, 3:47 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe, Wilson	58 min
May 17, 4:01 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr	59 min
May 17, 4:43 PM CDT	Flash Flood Warning	EWX	Bandera, Kerr	2 hr
May 17, 4:55 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina	65 min
May 17, 5:13 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	62 min
May 17, 5:53 PM CDT	Severe Thunderstorm Warning	EWX	Medina	67 min
May 17, 6:41 PM CDT	Flash Flood Warning	EWX	Edwards, Real	109 min
May 17, 6:47 PM CDT	Severe Thunderstorm Warning	EWX	Kinney	58 min
May 17, 6:59 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	46 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every severe thunderstorm warning in 2002

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; radar from the NEXRAD Level II archive.