Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 13, NWS Austin/San Antonio, TX

March 25, 20094 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 25, 2009, 6:11 PM CDT for 4 counties in Texas. It was in force for 40 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
Mar 25, 2009, 6:11 PM CDT (23:11 UTC)
Expired
Mar 25, 2009, 6:51 PM CDT
In force
40 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

Counties Bastrop County, TX, Lee County, TX, Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 35 km from the middle of the area, began a volume at 23:11 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
Mar 25, 6:30 PM CDTHAIL 0.75Coupland, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 25, 2:06 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.2 hours before the alert went out and 262 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, Fort Worth, TX at 12:00Z on 2009-03-25Temperature 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, Fort Worth, TX at 12:00Z on 2009-03-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2348 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
248 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.

000 
WUUS54 KEWX 252311
SVREWX
TXC021-287-453-491-260015-
/O.NEW.KEWX.SV.W.0013.090325T2311Z-090326T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
611 PM CDT WED MAR 25 2009

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL BASTROP COUNTY...
  NORTHWESTERN LEE COUNTY...
  EAST CENTRAL TRAVIS COUNTY...
  SOUTHEASTERN WILLIAMSON COUNTY...

* UNTIL 715 PM CDT.

* AT 609 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR HUTTO...OR
  7 MILES EAST OF PFLUGERVILLE...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE TAYLOR...COUPLAND...ELGIN...
  THRALL...FEDOR...LEXINGTON AND TANGLEWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT WEDNESDAY EVENING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3027 9697 3039 9758 3058 9757 3061 9720
      3048 9715 3057 9699 3057 9696 3055 9694
TIME...MOT...LOC 2312Z 275DEG 29KT 3048 9748

$$
2 follow-up statements
000 
WWUS54 KEWX 252340
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
640 PM CDT WED MAR 25 2009

TXC021-287-453-491-260015-
/O.CON.KEWX.SV.W.0013.000000T0000Z-090326T0015Z/
WILLIAMSON TX-TRAVIS TX-LEE TX-BASTROP TX-
640 PM CDT WED MAR 25 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTH CENTRAL BASTROP...NORTHWESTERN LEE...EXTREME EAST CENTRAL
TRAVIS AND SOUTHEASTERN WILLIAMSON COUNTIES...

AT 635 PM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS STORM WAS 
LOCATED NEAR BEYARSVILLE...COUPLAND AND THRALL...OR 10 MILES 
SOUTHEAST OF TAYLOR...MOVING EAST AT 35 MPH.  PENNY SIZE HAIL IS 
BEING REPORTED IN COUPLAND.

SOME LOCATIONS IN THE WARNING AREA INCLUDE KNOBB SPRINGS...BLUE...
FEDOR...LEXINGTON...TANGLEWOOD AND LEO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CDT FOR THE WARNED 
AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES. 

&&

LAT...LON 3027 9697 3037 9745 3059 9737 3061 9720
      3048 9715 3057 9699 3057 9696 3055 9694
TIME...MOT...LOC 2336Z 275DEG 29KT 3050 9730

$$
000 
WWUS54 KEWX 252351
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
651 PM CDT WED MAR 25 2009

TXC021-287-453-491-252358-
/O.CAN.KEWX.SV.W.0013.000000T0000Z-090326T0015Z/
WILLIAMSON TX-TRAVIS TX-LEE TX-BASTROP TX-
651 PM CDT WED MAR 25 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BASTROP...
NORTHWESTERN LEE...EXTREME EAST CENTRAL TRAVIS AND SOUTHEASTERN
WILLIAMSON COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM HAS WEAKENED AND MOVED OFF TO THE EAST.  
SMALL HAIL AND BRIEF HEAVY RAIN ARE STILL POSSIBLE OVER FAR EASTERN 
WILLIAMSON COUNTY FOR THE NEXT FEW MINUTES.  

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT WEDNESDAY EVENING 
FOR MUCH OF SOUTH CENTRAL TEXAS.

LAT...LON 3027 9697 3037 9745 3059 9737 3061 9720
      3048 9715 3057 9699 3057 9696 3055 9694
TIME...MOT...LOC 2348Z 275DEG 29KT 3049 9719

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 25, 3:45 PM CDTSevere Thunderstorm WarningEWXGillespie, Llano60 min
Mar 25, 4:00 PM CDTTornado WarningEWXLlano45 min
Mar 25, 4:37 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Llano38 min
Mar 25, 4:48 PM CDTTornado WarningEWXBlanco, Burnet, Llano42 min
Mar 25, 4:59 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Travis, Williamson46 min
Mar 25, 5:18 PM CDTSevere Thunderstorm WarningEWXBlanco, Gillespie, Kendall42 min
Mar 25, 5:35 PM CDTSevere Thunderstorm WarningEWXTravis, Williamson55 min
Mar 25, 6:05 PM CDTAreal Flood AdvisoryEWXHays, Travis, Williamson100 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.