Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 3, NWS Austin/San Antonio, TX

March 18, 2002Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 18, 2002, 10:56 PM CST for Val Verde County, Texas. It was in force for 94 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
Mar 18, 2002, 10:56 PM CST (04:56 UTC)
Expired
Mar 19, 2002, 12:30 AM CST
In force
94 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 4.9 hours before the alert went out and 48 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 2002-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1079 joules per kilogram.LCLLFCEL10008507005003002001001 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 2002-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939587897Sfc1 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
1079 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
865 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 190456
SVRSAT
TXC465-190630-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1053 PM CST MON MAR 18 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  VAL VERDE

* UNTIL 1230 AM CST

* AT 1053 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 36 MILES SOUTH OF VAL VERDE COUNTY...OR ABOUT
  25 MILES WEST OF DEL RIO...MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
 NEAR COMSTOCK AT 1115 PM

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS LOW WATER CROSSINGS...
DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED
ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND
RIVERS MAY ALSO RISE. SEEK HIGHER GROUND IF THREATENED BY FLOOD
WATERS.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM HIGH AREAS...METAL OBJECTS...AND TALL ISOLATED TREES. MOVE
INDOORS IF POSSIBLE BUT STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING THE TELEPHONE UNLESS IT IS AN EMERGENCY.


LAT...LON 2947 10141 2934 10127 2997 10071 3009 10118

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 1:40 PM CSTSevere Thunderstorm WarningEWXVal Verde35 min
Mar 19, 1:59 PM CSTSevere Thunderstorm WarningEWXVal Verde61 min
Mar 19, 2:54 PM CSTSevere Thunderstorm WarningEWXVal Verde51 min
Mar 19, 3:05 PM CSTTornado WarningEWXVal Verde25 min
Mar 19, 3:19 PM CSTTornado WarningEWXEdwards26 min
Mar 19, 3:28 PM CSTTornado WarningEWXVal Verde32 min
Mar 19, 3:42 PM CSTTornado WarningEWXEdwards, Kinney33 min
Mar 19, 4:07 PM CSTTornado WarningEWXKinney, Val Verde53 min
Mar 19, 4:18 PM CSTTornado WarningEWXEdwards27 min
Mar 19, 4:42 PM CSTSevere Thunderstorm WarningEWXReal63 min
Mar 19, 5:29 PM CSTTornado WarningEWXMaverick61 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.