Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 12, NWS Austin/San Antonio, TX

January 25, 2012Lee County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 25, 2012, 6:23 AM CST for Lee County, Texas. It was in force for 52 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: Jan 25, 2012, 6:23 AM CST (12:23 UTC)
Expired: Jan 25, 2012, 7:15 AM CST
In force: 52 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

County Lee County, TX

The radar

The Ft Hood radar (KGRK), 62 km from the middle of the area, began a volume at 12:23 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.

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 25, 3:17 AM CST	Tornado Watch	SPC	11 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 0.4 hours before the alert went out and 296 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: 1968 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 518 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 280 m²/s²
0-3 km storm-relative helicity: 344 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 21.9

Open this sounding in Storm Lab

The text

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

347 
WUUS54 KEWX 251223
SVREWX
TXC287-251315-
/O.NEW.KEWX.SV.W.0012.120125T1223Z-120125T1315Z/

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL LEE COUNTY...

* UNTIL 715 AM CST.

* AT 618 AM CST...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES WEST OF
  DIME BOX...OR 8 MILES SOUTHEAST OF LEXINGTON...AND MOVING NORTHEAST
  AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE IMPACT MAINLY RURAL AREAS OF
  THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3024 9687 3034 9704 3053 9691 3045 9686
      3036 9676
TIME...MOT...LOC 1223Z 215DEG 31KT 3037 9689

$$

1 follow-up statement

551 
WWUS54 KEWX 251309
SVSEWX

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

TXC287-251319-
/O.EXP.KEWX.SV.W.0012.000000T0000Z-120125T1315Z/
LEE TX-
709 AM CST WED JAN 25 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LEE COUNTY WILL EXPIRE
AT 715 AM CST...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM CST WEDNESDAY MORNING
FOR SOUTH CENTRAL TEXAS.

LAT...LON 3024 9687 3034 9704 3053 9691 3045 9686
      3036 9676
TIME...MOT...LOC 1309Z 215DEG 31KT 3069 9663

$$

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, 1:33 AM CST	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Hays	42 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, 6:26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.