Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 26, NWS Austin/San Antonio, TX

April 7, 2002Atascosa County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 7, 2002, 11:37 PM CDT for Atascosa County, Texas. It was in force for 38 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 7, 2002, 11:37 PM CDT (04:37 UTC)
Expired
Apr 8, 2002, 12:15 AM CDT
In force
38 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Atascosa County, TX

The radar

The Austin/San Antonio radar (KEWX), 104 km from the middle of the area, began a volume at 04:40 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.

What was reported inside it

TimeReportWhereRemark
Apr 7, 11:50 PM CDTHail 2.5Pleasanton, TXHail up to the size of tennis balls, driven by winds of 40 to 50 mph, damaged windows of homes and cars in the Pleasanton area.

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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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, 4.6 hours before the alert went out and 183 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 080437
SVRSAT
TXC013-080515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1136 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...
  ATASCOSA

* UNTIL 1215 AM CDT

* AT 1136 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER JOURDANTON...OR ABOUT 3 MILES SOUTHWEST OF
  JOURDANTON...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
NEAR JOURDANTON AT 1150 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.


LAT...LON 2902 9880 2866 9879 2881 9818 2912 9852

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 7, 10:15 PM CDT, 1 hour 22 minutes earlier.

Area forecast discussion, Apr 7, 10:15 PM CDT, 1 hour 22 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1015 PM CDT SUN APR 7 2002

LATE AFTERNOON AND EVENING HAS BEEN DOMINATED BY SEVERE WEATHER
THREAT WHICH HAS JUST ABOUT RUN ITS COURSE FOR THE EASTERN TIER OF
COUNTIES BUT IS STILL ONGOING ACROSS FRIO...ATASCOSA AND WILSON
COUNTIES AT THIS WRITING.  ZONES HAVE BEEN UPDATED AND MODIFIED
SOMEWHAT TO REFLECT ONGOING CONVECTION AND CONTINUATION OF WW #75
AND CANCELLATION OF WW #74.  BENEFICIAL RAINS HAVE FALLEN ACROSS
JUST ABOUT ALL COUNTIES DURING THE AFTERNOON AND EVENING.

.EWX...NONE.

PREVIOUS DISCUSSION
UPPER LOW MOVING EAST ACROSS NEW MEXICO WITH TRAILING DRY LINE FROM
SOUTHEAST OF MIDLAND TO SANDERSON.  CURRENT PROJECTIONS ARE FOR THE
DRY LINE TO PUSH INTO FAR WESTERN PORTIONS OF OUR AREA BY 4
PM...MOVING INTO THE CENTRAL PORTIONS BY MIDNIGHT...EASTERN PORTIONS
LATE TONIGHT.  AS PREVIOUSLY ADVERTISED...THIS SHOULD BE A SQUALL
LINE TYPE EVENT WITH POSSIBLE LARGE HAIL...HIGH WINDS ALONG THE LINE
AND BOW TORNADOES.

SHOWERS AND STORMS WILL EXIT THE EASTERN PORTIONS BY NOON TOMORROW
WITH CLEARING SKIES AND WARM TEMPERATURES AS DRY WESTERLY AIR MIXES
DOWN. MOSTLY CLEAR MONDAY NIGHT AS RIDGING BUILDS IN.  INCREASING
MID AND HIGH CLOUDS BY WEDNESDAY AS DIFLUENT AXIS AHEAD OF NEXT
SYSTEM MOVES IN FROM THE WEST.  SEVERAL DAYS OF DREARY WEATHER IN
STORE THURSDAY THROUGH SATURDAY AS UPPER LOW TO WEST APPROACHES AND
OPENS GULF.  SHOWERS AND THUNDESTORMS POSSIBLE AGAIN BY FRIDAY INTO
SATURDAY AS TROUGH MOVES ACROSS...DECREASING CLOUDS SUNDAY.

PRELIMINARY NUMBERS...
AUS 64/81/57/78/54 84000
DRT 58/88/58/82/60 50000
SAT 62/85/58/80/57 82000

.EWX...CAUTION ON AREA LAKES EASTERN HALF.

In the hours before

Local storm report, Apr 7, 7:12 PM CDT, 4 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
712 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    DEL RIO                   TX   WIND DAMAGE
04/07/02   VAL VERDE                      SPANISH TILE ROOF, TRUCK
                                          HAIL DAMAGE
                                          REPORTED BY
                                          SPOTTER
                                          TIME ESTIMATED

0400 PM    VAL VERDE PARK ESTATES
           DEL RIO                   TX   TORNADO
04/07/02   VAL VERDE                      REPORTED BY LAW
                                          ENFORCEMENT
                                          TIME ESTIMATED

DC
Local storm report, Apr 7, 8:18 PM CDT, 3 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
818 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0725 PM    DHANIS                   TX   1.75 INCH HAIL
04/07/02   MEDINA                         REPORTED BY
                                          SPOTTER

0730 PM    BLANCO                    TX   FUNNEL CLOUDS
04/07/02   BLANCO                         FUNNEL CLOUDS
                                          REPORTED BY
                                          CO-OP OBSERVER

DC
Local storm report, Apr 7, 8:46 PM CDT, 2 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
846 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0829 PM    7E FRIO TOWN              TX   .75 INCH HAIL
04/07/02   FRIO                           REPORTED BY
                                          SPOTTERS

DC
Local storm report, Apr 7, 9:39 PM CDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
939 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0847 PM    BIGFOOT                   TX   TORNADO
04/07/02   FRIO                           REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 7, 10:02 PM CDT, 1 hour 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1002 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0945 PM    FLORESVILLE               TX   1.75 INCH HAIL
04/07/02   WILSON                         REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 7, 10:55 PM CDT, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
1055 PM CDT SUN APR 7 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0830 PM    2.5 N DEVINE              TX   WIND DAMAGE
04/07/02   MEDINA                         TWO MOBILE HOMES
                                          DESTROYED. VEHICLE PICKED
                                          UP AND SLAMMED DOWN
                                          REPORTED
                                          BY LAW ENFORCEMENT

DC

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, 8:36 PM CDTSevere Thunderstorm WarningEWXComal24 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, 11:59 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.