Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 18, NWS Austin/San Antonio, TX

April 7, 2002Hays County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 7, 2002, 8:29 PM CDT for Hays County, Texas. It was in force for 46 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, 8:29 PM CDT (01:29 UTC)
Expired
Apr 7, 2002, 9:15 PM CDT
In force
46 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Hays County, TX

The radar

The Austin/San Antonio radar (KEWX), 45 km from the middle of the area, began a volume at 01:30 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.

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

Del Rio, TX (KDRT), launched 00:00Z, 1.5 hours before the alert went out and 272 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, Del Rio, TX at 00:00Z on 2002-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 622 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, Del Rio, TX at 00:00Z on 2002-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
622 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1496 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 080129
SVRSAT
TXC209-080215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
827 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...
  HAYS

* UNTIL 915 PM CDT

* AT 827 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WOODCREEK...OR ABOUT 13 MILES NORTH OF   
  CANYON LAKE...MOVING EAST AT 20 MPH.  DAMAGING WINDS ARE POSSIBLE
  WITH THIS STORM.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER WOODCREEK AT 840 PM
  3 MILES NORTH OF WIMBERLEY AT 845 PM


LAT...LON 3006 9829 2991 9801 3015 9796 3029 9818

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, 3:15 PM CDT, 5 hours 14 minutes earlier.

Area forecast discussion, Apr 7, 3:15 PM CDT, 5 hours 14 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
315 PM CDT SUN APR 7 2002

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, 4:58 PM CDT, 3 hours 31 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED TO CHANGE TORNADO TO
FUNNEL CLOUD
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
458 PM CDT SUN APR 7 2002

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

0423 PM    2NW DEL RIO               TX   .75 INCH HAIL
04/07/02   VAL VERDE

0430 PM    DEL RIO                   TX   1.00 INCH HAIL
04/07/02   VAL VERDE

0435 PM    DEL RIO                   TX   1.75 INCH HAIL
04/07/02   VAL VERDE                      REPORTED BY
                                          SPOTTER

0436 PM    DEL RIO                   TX   FUNNEL CLOUD
04/07/02   VAL VERDE                      SEVERAL REPORTS FROM
                                          PUBLIC OF FUNNEL
                                          CLOUDS
                                          REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 7, 5:45 PM CDT, 2 hours 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
545 PM CDT SUN APR 7 2002

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

0418 PM    DEL RIO                   TX   3.00 INCH HAIL
04/07/02   VAL VERDE                      REPORTED BY CO-OP
                                          OBSERVER

0425 PM    DEL RIO                   TX   2.00 INCH HAIL
04/07/02   VAL VERDE                      REPORTED BY
                                          OBSERVER

0450 PM    DEL RIO                   TX   2.75 INCH HAIL
04/07/02   VAL VERDE                      REPORTED BY LAW
                                          ENFORCEMENT

0525 PM    BRACKETTVILLE             TX   2.75 INCH HAIL
04/07/02   KINNEY                         REPORTED BY CO-OP
                                          OBSERVER

DC
Local storm report, Apr 7, 6:50 PM CDT, 1 hour 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
650 PM CDT SUN APR 7 2002

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

0550 PM    BRACKETTVILLE             TX   WIND DAMAGE
04/07/02   KINNEY                         TREES DOWN
                                          REPORTED BY LAW
                                          ENFORCEMENT

0550 PM    BRACKETTVILLE             TX   2.75 INCH HAIL
04/07/02   KINNEY                         REPORTED BY LAW
                                          ENFORCEMENT

0634 PM    UVALDE                    TX   TORNADO
04/07/02   UVALDE                         POSSIBLE ROTATION IN
                                          CLOUDS
                                          REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 7, 7:01 PM CDT, 1 hour 28 minutes before
PRELIMINARY LOCAL STORM REPORT...CORREECTED TO CHANGE TORNADO TO
FUNNEL CLOUD
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
701 PM CDT SUN APR 7 2002

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

0550 PM    BRACKETTVILLE             TX   WIND DAMAGE
04/07/02   KINNEY                         TREES DOWN
                                          REPORTED BY LAW
                                          ENFORCEMENT

0550 PM    BRACKETTVILLE             TX   2.75 INCH HAIL
04/07/02   KINNEY                         REPORTED BY LAW
                                          ENFORCEMENT

0634 PM    UVALDE                    TX   FUNNEL CLOUD
04/07/02   UVALDE                         POSSIBLE ROTATION IN
                                          CLOUDS
                                          REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 7, 7:12 PM CDT, 1 hour 17 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, 11 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

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 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, 11:37 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.