Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, NWS Austin/San Antonio, TX

January 25, 20124 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 25, 2012, 1:33 AM CST for 4 counties in Texas. It was in force for 42 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: Jan 25, 2012, 1:33 AM CST (07:33 UTC)
Expired: Jan 25, 2012, 2:15 AM CST
In force: 42 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Bexar County, TX, Comal County, TX, Guadalupe County, TX, Hays County, TX

The radar

The Austin/San Antonio radar (KEWX), 31 km from the middle of the area, began a volume at 07:34 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

Time	Report	Where	Remark
Jan 25, 2:00 AM CST	FUNNEL CLOUD	1 E Selma, TX	HIGH WINDS NEAR SELMA.

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.

Issued	Product	Office	Lasted
Jan 24, 10:05 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 7.6 hours before the alert went out and 228 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1865 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.7

Open this sounding in Storm Lab

The text

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

114 
WUUS54 KEWX 250733
SVREWX
TXC029-091-187-209-250815-
/O.NEW.KEWX.SV.W.0010.120125T0733Z-120125T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
133 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BEXAR COUNTY...
  EASTERN COMAL COUNTY...
  NORTHWESTERN GUADALUPE COUNTY...
  EXTREME SOUTH CENTRAL HAYS COUNTY...

* UNTIL 215 AM CST.

* AT 130 AM CST...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED NEAR CHINA GROVE...OR 9 MILES
  SOUTHEAST OF SAN ANTONIO...AND MOVING NORTHEAST AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE ST. HEDWIG...WINDCREST...LIVE
  OAK...UNIVERSAL CITY...SCHERTZ...SELMA...CIBOLO...GARDEN RIDGE...
  MARION...MCQUEENEY...NEW BRAUNFELS...GERONIMO...ZORN AND CANYON
  LAKE DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2960 9846 2991 9830 2975 9790 2930 9830
      2939 9849
TIME...MOT...LOC 0733Z 207DEG 40KT 2943 9834

$$

2 follow-up statements

628 
WWUS54 KEWX 250752
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
152 AM CST WED JAN 25 2012

TXC029-091-187-209-250815-
/O.CON.KEWX.SV.W.0010.000000T0000Z-120125T0815Z/
GUADALUPE TX-HAYS TX-BEXAR TX-COMAL TX-
152 AM CST WED JAN 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM CST
FOR EASTERN COMAL...NORTHEASTERN BEXAR...EXTREME SOUTH CENTRAL HAYS
AND NORTHWESTERN GUADALUPE COUNTIES...

AT 144 AM CST...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR RANDOLPH AFB...OR NEAR UNIVERSAL CITY...
MOVING NORTHEAST AT 35 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE GARDEN RIDGE...MARION...
MCQUEENEY...SOLMS...NEW BRAUNFELS...FREIHEIT...GRUENE...
STARTZVILLE...ZORN...SATTLER AND CANYON LAKE DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2960 9846 2991 9830 2975 9790 2930 9830
      2939 9849
TIME...MOT...LOC 0750Z 207DEG 30KT 2960 9824

$$

068 
WWUS54 KEWX 250803
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
203 AM CST WED JAN 25 2012

TXC029-091-187-209-250815-
/O.CON.KEWX.SV.W.0010.000000T0000Z-120125T0815Z/
GUADALUPE TX-HAYS TX-BEXAR TX-COMAL TX-
203 AM CST WED JAN 25 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM CST
FOR SOUTHEASTERN COMAL...EAST CENTRAL BEXAR...EXTREME SOUTH CENTRAL
HAYS AND NORTHWESTERN GUADALUPE COUNTIES...

AT 153 AM CST...NWS METEOROLOGISTS CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR CIBOLO...OR 7 MILES NORTHEAST OF 
UNIVERSAL CITY...MOVING NORTHEAST AT ABOUT 30 MPH.

SOME LOCATIONS IN THE WARNING AREA INCLUDE NEW BRAUNFELS...GRUENE...
FREIHEIT...SATTLER AND ZORN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2964 9837 2988 9824 2975 9790 2942 9821
      2950 9847
TIME...MOT...LOC 0802Z 216DEG 26KT 2968 9815

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 24, 10:38 PM CST	Severe Thunderstorm Warning	EWX	Val Verde	26 min
Jan 24, 10:40 PM CST	Severe Thunderstorm Warning	EWX	Val Verde	35 min
Jan 24, 10:52 PM CST	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	38 min
Jan 24, 11:17 PM CST	Severe Thunderstorm Warning	EWX	Edwards	28 min
Jan 24, 11:29 PM CST	Tornado Warning	EWX	Edwards	16 min
Jan 24, 11:41 PM CST	Severe Thunderstorm Warning	EWX	Edwards	35 min
Jan 24, 11:44 PM CST	Severe Thunderstorm Warning	EWX	Edwards	32 min
Jan 25, 12:20 AM CST	Severe Thunderstorm Warning	EWX	Edwards, Real	40 min
Jan 25, 1:17 AM CST	Areal Flood Advisory	EWX	Bexar	103 min
Jan 25, 2:00 AM CST	Flash Flood Warning	EWX	Bexar	6 hr
Jan 25, 2:06 AM CST	Areal Flood Advisory	EWX	Caldwell, Comal, Guadalupe, Hays	114 min
Jan 25, 2:15 AM CST	Areal Flood Advisory	EWX	Hays, Travis	105 min
Jan 25, 2:47 AM CST	Flash Flood Warning	EWX	Travis	3 hr
Jan 25, 3:33 AM CST	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	42 min
Jan 25, 4:06 AM CST	Areal Flood Advisory	EWX	Bexar, Blanco, Comal, Hays, Kendall	114 min
Jan 25, 4:09 AM CST	Areal Flood Advisory	EWX	Bastrop, Caldwell	111 min
Jan 25, 4:26 AM CST	Flash Flood Warning	EWX	Bastrop	3 hr
Jan 25, 4:26 AM CST	Flash Flood Warning	EWX	Travis, Williamson	3 hr
Jan 25, 4:54 AM CST	Areal Flood Advisory	EWX	Comal, Guadalupe, Hays	2 hr
Jan 25, 5:18 AM CST	Flash Flood Warning	EWX	Bastrop, Caldwell, Hays, Travis	3 hr
Jan 25, 5:49 AM CST	Areal Flood Advisory	EWX	Guadalupe	101 min
Jan 25, 5:54 AM CST	Areal Flood Advisory	EWX	Bastrop, Caldwell	2 hr
Jan 25, 6:07 AM CST	Flash Flood Warning	EWX	Lee	3 hr
Jan 25, 6:23 AM CST	Severe Thunderstorm Warning	EWX	Lee	52 min
Jan 25, 6:26 AM CST	River Flood Warning	EWX	Travis	14 hr
Jan 25, 6:39 AM CST	River Flood Warning	EWX	Bexar	14 hr
Jan 25, 6:46 AM CST	Flash Flood Warning	EWX	Bastrop	3 hr
Jan 25, 6:56 AM CST	River Flood Warning	EWX	Bexar, Wilson	32 hr
Jan 25, 7:04 AM CST	Flash Flood Warning	EWX	Fayette	3 hr
Jan 25, 9:05 AM CST	River Flood Warning	EWX	Caldwell, Gonzales	34 hr
Jan 25, 9:05 AM CST	River Flood Warning	EWX	Gonzales	60 hr
Jan 25, 9:27 AM CST	Flash Flood Warning	EWX	Bastrop	2 hr
Jan 25, 5:49 PM CST	Areal Flood Advisory	EWX	Bastrop	101 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

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.