Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 147, NWS Austin/San Antonio, TX

December 30, 2002Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Dec 30, 2002, 3:28 PM CST for Bexar County, Texas. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 30, 2002, 3:28 PM CST (21:28 UTC)
Expired: Dec 30, 2002, 4:30 PM CST
In force: 62 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 21:28 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 30, 12:00 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.5 hours before the alert went out and 223 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: 302 J/kg
Mixed-layer CIN: -271 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 154 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.

095 
WUUS54 KEWX 302128
SVRSAT
TXC029-302230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
328 PM CST MON DEC 30 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 430 PM CST

* AT 328 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SAN ANTONIO...OR ABOUT 3 MILES NORTHWEST
  OF SAN ANTONIO...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  5 MILES SOUTHEAST OF HOLLYWOOD PARK AT 335 PM
  3 MILES NORTHWEST OF WINDCREST AT 340 PM
  2 MILES NORTHWEST OF LIVE OAK AT 350 PM
  OVER SELMA AT 355 PM
  4 MILES NORTHWEST OF SCHERTZ AT 400 PM

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.

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A
PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM IF A TORNADO IS SPOTTED.


$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 30, 1:26 PM CST	Severe Thunderstorm Warning	EWX	Kerr, Real	64 min
Dec 30, 1:48 PM CST	Severe Thunderstorm Warning	EWX	Burnet, Williamson	42 min
Dec 30, 1:53 PM CST	Severe Thunderstorm Warning	EWX	Medina	37 min
Dec 30, 1:57 PM CST	Severe Thunderstorm Warning	EWX	Bexar	63 min
Dec 30, 2:05 PM CST	Tornado Warning	EWX	Bexar	55 min
Dec 30, 2:26 PM CST	Tornado Warning	EWX	Comal	64 min
Dec 30, 3:05 PM CST	Tornado Warning	EWX	Hays	55 min
Dec 30, 3:18 PM CST	Tornado Warning	EWX	Caldwell	57 min
Dec 30, 3:29 PM CST	Severe Thunderstorm Warning	EWX	Travis	61 min
Dec 30, 3:50 PM CST	Severe Thunderstorm Warning	EWX	Guadalupe	55 min
Dec 30, 3:53 PM CST	Severe Thunderstorm Warning	EWX	Comal	52 min
Dec 30, 3:58 PM CST	Tornado Warning	EWX	Bastrop	62 min
Dec 30, 3:59 PM CST	Severe Thunderstorm Warning	EWX	Williamson	61 min
Dec 30, 4:22 PM CST	Tornado Warning	EWX	Williamson	53 min
Dec 30, 5:00 PM CST	Severe Thunderstorm Warning	EWX	Gonzales	60 min
Dec 30, 5:11 PM CST	Tornado Warning	EWX	Bastrop, Fayette, Lee	64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.