Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 7, NWS Austin/San Antonio, TX

February 21, 2003Bandera County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Feb 21, 2003, 3:51 AM CST for Bandera County, Kerr County, Texas. It was in force for 54 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
Feb 21, 2003, 3:51 AM CST (09:51 UTC)
Expired
Feb 21, 2003, 4:45 AM CST
In force
54 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Bandera County, TX, Kerr 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 nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 9.9 hours before the alert went out and 150 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 2003-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2003-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

399 
WUUS54 KEWX 210951
SVRSAT
TXC019-265-211045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
351 AM CST FRI FEB 21 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  KERR
  BANDERA

* UNTIL 445 AM CST

* AT 351 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER VANDERPOOL...MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  4 MILES SOUTHEAST OF INGRAM AT 425 AM
  OVER KERRVILLE AT 430 AM

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.


LAT...LON 2984 9961 3014 9931 3013 9920 3000 9904
          2965 9953 2972 9961

$$

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 Feb 21, 2:22 AM CST, 1 hour 29 minutes earlier.

Area forecast discussion, Feb 21, 2:22 AM CST, 1 hour 29 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
222 AM CST FRI FEB 21 2003

ACTIVITY ON THE INCREASE AGAIN AS THE UPPER LOW CONTINUES TO DIG
SOUTHEAST TOWARD THE BIG BEND.  DYNAMICS FOR SEVERE WEATHER AND
HEAVY RAIN TODAY WILL COME TO AN END AS THE UPPER LOW SWEEPS ACROSS
SOUTH TEXAS THIS AFTERNOON. TEMPS TODAY WILL VARY LITTLE DUE TO
RAINS.  CLEARING SKIES TONIGHT WILL ALLOW TEMPS TO DROP TO NEAR
NORMAL VALUES. MUCH DRIER ATMOS SATURDAY AND A BIT OF DOWNSLOPING
WINDS OVER WESTERN COUNTIES WILL ALLOW TEMPS TO RISE TO NORMAL OR
ABOVE NORMAL.  SOME INCOMING CIRRUS SUNDAY WITH THE NEXT STORM
SYSTEM SWINGING THROUGH THE CENTRAL U.S.  A BACKDOOR TYPE FRONT WILL
MOVE INTO SOUTH TEXAS MONDAY SETTING UP ANOTHER ROUND OF SHOWERS AND
THUNDERSTORMS BY MID WEEK.

PRELIM NUMBERS...
AUS 55 43 66 43 66    +500
SAT 58 45 66 45 68    +500
DRT 58 49 74 46 71    +200

.EWX...FLASH FLOOD WATCH THOROUGH FRIDAY AFTERNOON FOR ALL OF
SOUTH CENTRAL TEXAS.

06/08
Hazardous weather outlook, Feb 20, 6:00 AM CST, 21 hours 51 minutes before
TXZ171>173-183>194-202>209-217>225-228-211200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 AM CST THU FEB 20 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY...EXCESSIVE RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE
EXPECTED OVER ALL OF SOUTH CENTRAL TEXAS TODAY.  AS A WINTER STORM
SYSTEM APPROACHES SOUTH TEXAS TONIGHT, AN ADDITIONAL 2 TO 3 INCHES
OF RAIN IS POSSIBLE AND FLASH FLOODING BECOMES LIKELY.  ALSO THERE
IS A SLIGHT RISK OF SEVERE THUNDERSTORMS WITH LARGE HAIL.

.DAYS TWO THROUGH SEVEN...
AN ADDITIONAL ONE INCH OF RAIN FRIDAY IS POSSIBLE BEFORE THE WINTER
STORM EXITS SOUTH TEXAS.  FLASH FLOODING AND A FEW SEVERE
THUNDERSTORMS WILL REMAIN UNTIL AROUND NOON FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 8:06 PM CSTFlash Flood WarningEWXBurnet3 hr
Feb 20, 8:31 PM CSTFlash Flood WarningEWXFayette89 min
Feb 21, 3:47 AM CSTFlash Flood WarningEWXBandera, Gillespie, Kendall, Kerr3 hr
Feb 21, 4:39 AM CSTFlash Flood WarningEWXBlanco, Burnet3 hr
Feb 21, 4:47 AM CSTSevere Thunderstorm WarningEWXKendall, Kerr58 min
Feb 21, 6:01 AM CSTFlash Flood WarningEWXHays, Travis, Williamson4 hr
Feb 21, 6:38 AM CSTFlash Flood WarningEWXGillespie67 min

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.