Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 28, NWS Austin/San Antonio, TX

April 8, 2002Wilson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 8, 2002, 12:06 AM CDT for Wilson County, Texas. It was in force for 54 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: Apr 8, 2002, 12:06 AM CDT (05:06 UTC)
Expired: Apr 8, 2002, 1:00 AM CDT
In force: 54 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 58 km from the middle of the area, began a volume at 05:09 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
Apr 8, 12:30 AM CDT	Hail 1.75	Floresville, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 7, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.1 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: 2444 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 080506
SVRSAT
TXC493-080600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1206 AM CDT MON APR 8 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 100 AM CDT

* AT 1206 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF FLORESVILLE...MOVING EAST
  AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  7 MILES SOUTH OF STOCKDALE AT 1225 AM

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.


LAT...LON 2912 9841 2893 9819 2924 9780 2936 9788
          2940 9817

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 7:03 PM CDT	Tornado Warning	EWX	Uvalde	57 min
Apr 7, 7:09 PM CDT	Tornado Warning	EWX	Medina	66 min
Apr 7, 7:36 PM CDT	Tornado Warning	EWX	Frio	54 min
Apr 7, 8:14 PM CDT	Tornado Warning	EWX	Medina	31 min
Apr 7, 8:29 PM CDT	Severe Thunderstorm Warning	EWX	Hays	46 min
Apr 7, 8:29 PM CDT	Tornado Warning	EWX	Frio	61 min
Apr 7, 8:36 PM CDT	Severe Thunderstorm Warning	EWX	Comal	24 min
Apr 7, 8:40 PM CDT	Tornado Warning	EWX	Atascosa	65 min
Apr 7, 9:18 PM CDT	Tornado Warning	EWX	Wilson	57 min
Apr 7, 9:31 PM CDT	Severe Thunderstorm Warning	EWX	Frio	59 min
Apr 7, 10:15 PM CDT	Severe Thunderstorm Warning	EWX	Wilson	60 min
Apr 7, 10:26 PM CDT	Flash Flood Warning	EWX	Frio	3 hr
Apr 7, 10:31 PM CDT	Severe Thunderstorm Warning	EWX	Frio	59 min
Apr 7, 10:37 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	53 min
Apr 7, 10:55 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	65 min
Apr 7, 11:07 PM CDT	Flash Flood Warning	EWX	Atascosa	6 hr
Apr 7, 11:25 PM CDT	Flash Flood Warning	EWX	Wilson	6 hr
Apr 7, 11:29 PM CDT	Severe Thunderstorm Warning	EWX	Frio	46 min
Apr 7, 11:37 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa	38 min
Apr 7, 11:59 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	46 min
Apr 8, 12:13 AM CDT	Tornado Warning	EWX	Atascosa	62 min
Apr 8, 12:23 AM CDT	Severe Thunderstorm Warning	EWX	Frio	37 min
Apr 8, 12:31 AM CDT	Severe Thunderstorm Warning	EWX	Medina, Uvalde, Zavala	59 min
Apr 8, 12:54 AM CDT	Tornado Warning	EWX	Frio	36 min
Apr 8, 12:55 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kendall	50 min
Apr 8, 1:00 AM CDT	Severe Thunderstorm Warning	EWX	Wilson	45 min
Apr 8, 1:20 AM CDT	Tornado Warning	EWX	Atascosa, Frio, Medina	55 min
Apr 8, 1:24 AM CDT	Flash Flood Warning	EWX	Medina	111 min
Apr 8, 1:30 AM CDT	Severe Thunderstorm Warning	EWX	Bexar	60 min
Apr 8, 1:50 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	40 min
Apr 8, 2:05 AM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Gonzales	40 min
Apr 8, 2:08 AM CDT	Flash Flood Warning	EWX	Bexar, Guadalupe	3 hr
Apr 8, 2:13 AM CDT	Tornado Warning	EWX	Bexar, Wilson	47 min
Apr 8, 2:46 AM CDT	Severe Thunderstorm Warning	EWX	Caldwell	59 min
Apr 8, 2:54 AM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	51 min
Apr 8, 3:07 AM CDT	Flash Flood Warning	EWX	Caldwell	2 hr
Apr 8, 3:11 AM CDT	Flash Flood Warning	EWX	Medina	2 hr
Apr 8, 3:18 AM CDT	Flash Flood Warning	EWX	Medina	117 min
Apr 8, 3:34 AM CDT	Severe Thunderstorm Warning	EWX	Medina	41 min
Apr 8, 4:13 AM CDT	Flash Flood Warning	EWX	Atascosa	4 hr
Apr 8, 4:59 AM CDT	Flash Flood Warning	EWX	Bexar, Guadalupe	2 hr

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.