Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 51, NWS Austin/San Antonio, TX

April 16, 2002Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 16, 2002, 7:58 PM CDT for Bexar County, Texas. It was in force for 22 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 16, 2002, 7:58 PM CDT (00:58 UTC)
Expired
Apr 16, 2002, 8:20 PM CDT
In force
22 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Bexar County, TX

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 16, 5:00 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.0 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2002-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 626 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2002-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
626 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
2821 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
142 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 170058
SVRSAT
TXC029-170020-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
759 PM CDT TUE APR 16 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 820 PM CDT

* AT 759 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERE THUNDERSTORMS OVER EASTERN BEXAR COUNTY...MOVING EAST
  AT 20 MPH.  

DAMAGING WIND AND HAIL IS POSSIBLE WITH THESE THUNDERSTORMS...
ALONG WITH DEADLY LIGHTNING AND LOCALLY HEAVY RAIN.  FLOODING
ON LOW LYING STRETTS AND AT LOW WATER CROSSINGS IS ALSO 
POSSIBLE.

LAT...LON 2949 9871 2936 9857 2944 9827 2965 9846

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 16, 2:33 PM CDT, 5 hours 25 minutes earlier.

Area forecast discussion, Apr 16, 2:33 PM CDT, 5 hours 25 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
230 PM CDT MON APR 15 2002

UPPER DISTURBANCE CONTINUES NEWD...SWEEPING CLOUDS AND MOISTURE WITH
IT.  WILL NOT INCLUDE ANY POPS FOR TONIGHT AFTER ALL.  FOR THE NEXT
TWO DAYS...WEAK DISTURBANCES CONTINUE TO SWING ACROSS SC TX IN SWLY
WINDS ALOFT...BUT WITH LAYER RH BELOW 40 PCT AND PW BELOW 1
INCH...RAIN CHANCES ARE NIL.  LOW CLOUDS REFORM WED NITE...WITH THE
STANDARD CLEARING TO PARTLY CLOUDY THU AFTN.  ALL THIS TIME...FLOW
IN BOUNDARY LAYER WILL HAVE BEEN REPLENISHING LOW LEVEL MOISTURE.
BY FRI...LAYER RH WILL BE BACK OVER 50 PCT AND PW WILL BE OVER 1.5
INCHES.  THATS ENOUGH FOR ANOTHER ROUND OF SHOWERS OR TSTMS FOR FRI
AS THE NEXT DISTURBANCES PASS IN THE SWLY FLOW ALOFT.  LOOKS LIKE
THIS WILL CONTINUE INTO THE WEEKEND.

NOT MUCH CHANGE IN TEMPS THRU THE PACKAGE.  DRIER AIR WILL ALLOW
SLIGHTLY COOLER MINS MOST SECTIONS ONIGHT...AND SLIGHTLY WARMER
HIGHS ON WED.  BY THU...WITH THE MOISTURE WILL RETURN...SC TX WILL
RESUME MINS OF 60S TO NEAR 70 AND HIGHS IN THE 80S THRU THE
REMAINDER OF THE PACKAGE.

.EWX...NONE

09/18/DC

PRELIMINARY NUMBERS...
AUS 67/85/67/85/67 00001
DRT 64/91/67/90/68 00001
SAT 68/87/69/86/70 00001

In the hours before

Local storm report, Apr 16, 6:28 PM CDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
628 PM CDT TUE APR 16 2002

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

0530 PM    RANDOLPH AFB              TX   .75 INCH HAIL
04/16/02   BEXAR                          REPORTED BY
                                          METAR

0605 PM    5 E CAMPBELLTON AT        TX   ROTATING WALL CLOUD
           JCT I37 AND FM791             REPORTED BY LAW
04/16/02   ATASCOSA                       ENFORCEMENT

0612 PM    I37 CAMPBELLTON CUTOFF    TX   TWO ROTATING WALL CLOUDS
04/16/02   ATASCOSA                       REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 16, 6:46 PM CDT, 1 hour 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
646 PM CDT TUE APR 16 2002

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

0628 PM    CAMPBELLTON               TX   ROTATING WALL CLOUD
           JCT I37 AND FM1099             REPORTED BY LAW
04/16/02   WILSON                         ENFORCEMENT

DC
Local storm report, Apr 16, 6:47 PM CDT, 1 hour 11 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED FOR COUNTY
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
647 PM CDT TUE APR 16 2002

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

0628 PM    CAMPBELLTON               TX   ROTATING WALL CLOUD
           JCT I37 AND FM1099             REPORTED BY LAW
04/16/02   ATASCOSA                       ENFORCEMENT

DC
Local storm report, Apr 16, 6:59 PM CDT, 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
659 PM CDT TUE APR 16 2002

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

0652 PM    VANCE JACKSON AND LOOP 410
           SAN ANTONIO               TX   .75 INCH HAIL
04/16/02   BEXAR                          REPORTED BY LAW
                                          ENFORCEMENT

DC
Local storm report, Apr 16, 7:11 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
711 PM CDT TUE APR 16 2002

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

0659 PM    SAN ANTONIO AIRPORT       TX   .75 INCH HAIL
04/16/02   BEXAR                          REPORTED BY
METAR

DC
Local storm report, Apr 16, 7:40 PM CDT, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO, TX
740 PM CDT TUE APR 16 2002

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

0720 PM    VANCE JACKSON AND LOOP 410
           SAN ANTONIO               TX   ROTATING CLOUD
04/16/02   BEXAR                          REPORTED BY LAW
                                          ENFORCEMENT

DC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 7:00 PM CDTSevere Thunderstorm WarningEWXBexar30 min
Apr 16, 7:04 PM CDTSevere Thunderstorm WarningEWXWilson56 min
Apr 16, 7:16 PM CDTSevere Thunderstorm WarningEWXAtascosa, Karnes59 min
Apr 16, 7:31 PM CDTSevere Thunderstorm WarningEWXBexar29 min
Apr 16, 7:45 PM CDTSevere Thunderstorm WarningEWXComal, Guadalupe45 min

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.