Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 19, NWS Austin/San Antonio, TX

April 7, 2002Comal County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 7, 2002, 8:36 PM CDT for Comal County, Texas. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 7, 2002, 8:36 PM CDT (01:36 UTC)
Expired
Apr 7, 2002, 9:00 PM CDT
In force
24 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Comal County, TX

The radar

The Austin/San Antonio radar (KEWX), 20 km from the middle of the area, began a volume at 01:40 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.

IssuedProductOfficeLasted
Apr 7, 8:00 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.6 hours before the alert went out and 248 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2002-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2444 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2002-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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 080136
SVRSAT
TXC091-080200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
835 PM CDT SUN APR 7 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 900 PM CDT

* AT 835 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER COMAL COUNTY...OR ABOUT 6 MILES NORTH OF
  NEW BRAUNFELS...MOVING EAST AT 30 MPH.  DAMAGING WINDS ARE POSSIBLE
  WITH THIS STORM.

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 2996 9826 2968 9828 2971 9805 2985 9805

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 7:03 PM CDTTornado WarningEWXUvalde57 min
Apr 7, 7:09 PM CDTTornado WarningEWXMedina66 min
Apr 7, 7:36 PM CDTTornado WarningEWXFrio54 min
Apr 7, 8:14 PM CDTTornado WarningEWXMedina31 min
Apr 7, 8:29 PM CDTSevere Thunderstorm WarningEWXHays46 min
Apr 7, 8:29 PM CDTTornado WarningEWXFrio61 min
Apr 7, 8:40 PM CDTTornado WarningEWXAtascosa65 min
Apr 7, 9:18 PM CDTTornado WarningEWXWilson57 min
Apr 7, 9:31 PM CDTSevere Thunderstorm WarningEWXFrio59 min
Apr 7, 10:15 PM CDTSevere Thunderstorm WarningEWXWilson60 min
Apr 7, 10:26 PM CDTFlash Flood WarningEWXFrio3 hr
Apr 7, 10:31 PM CDTSevere Thunderstorm WarningEWXFrio59 min
Apr 7, 10:37 PM CDTSevere Thunderstorm WarningEWXUvalde53 min
Apr 7, 10:55 PM CDTSevere Thunderstorm WarningEWXGonzales65 min
Apr 7, 11:07 PM CDTFlash Flood WarningEWXAtascosa6 hr
Apr 7, 11:25 PM CDTFlash Flood WarningEWXWilson6 hr
Apr 7, 11:29 PM CDTSevere Thunderstorm WarningEWXFrio46 min
Apr 7, 11:37 PM CDTSevere Thunderstorm WarningEWXAtascosa38 min
Apr 7, 11:59 PM CDTSevere Thunderstorm WarningEWXBexar46 min
Apr 8, 12:06 AM CDTSevere Thunderstorm WarningEWXWilson54 min
Apr 8, 12:13 AM CDTTornado WarningEWXAtascosa62 min
Apr 8, 12:23 AM CDTSevere Thunderstorm WarningEWXFrio37 min
Apr 8, 12:31 AM CDTSevere Thunderstorm WarningEWXMedina, Uvalde, Zavala59 min
Apr 8, 12:54 AM CDTTornado WarningEWXFrio36 min
Apr 8, 12:55 AM CDTSevere Thunderstorm WarningEWXBandera, Kendall50 min
Apr 8, 1:00 AM CDTSevere Thunderstorm WarningEWXWilson45 min
Apr 8, 1:20 AM CDTTornado WarningEWXAtascosa, Frio, Medina55 min
Apr 8, 1:24 AM CDTFlash Flood WarningEWXMedina111 min
Apr 8, 1:30 AM CDTSevere Thunderstorm WarningEWXBexar60 min
Apr 8, 1:50 AM CDTSevere Thunderstorm WarningEWXGuadalupe40 min
Apr 8, 2:05 AM CDTSevere Thunderstorm WarningEWXCaldwell, Gonzales40 min
Apr 8, 2:08 AM CDTFlash Flood WarningEWXBexar, Guadalupe3 hr
Apr 8, 2:13 AM CDTTornado WarningEWXBexar, Wilson47 min
Apr 8, 2:46 AM CDTSevere Thunderstorm WarningEWXCaldwell59 min
Apr 8, 2:54 AM CDTSevere Thunderstorm WarningEWXGuadalupe51 min
Apr 8, 3:07 AM CDTFlash Flood WarningEWXCaldwell2 hr
Apr 8, 3:11 AM CDTFlash Flood WarningEWXMedina2 hr
Apr 8, 3:18 AM CDTFlash Flood WarningEWXMedina117 min
Apr 8, 3:34 AM CDTSevere Thunderstorm WarningEWXMedina41 min
Apr 8, 4:13 AM CDTFlash Flood WarningEWXAtascosa4 hr
Apr 8, 4:59 AM CDTFlash Flood WarningEWXBexar, Guadalupe2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every 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.