Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 22, NWS Austin/San Antonio, TX

March 19, 2012Frio County, Medina County, Zavala County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 19, 2012, 5:50 PM CDT for Frio County, Medina County, Zavala County, Texas. It was in force for 55 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 19, 2012, 5:50 PM CDT (22:50 UTC)
Expired: Mar 19, 2012, 6:45 PM CDT
In force: 55 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Frio County, TX, Medina County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 105 km from the middle of the area, began a volume at 22:51 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
Mar 19, 6:39 PM CDT	HAIL 1.75	6 Ese Frio Town, TX	INTERSECTION OF US57 AND FM140 WALL CLOUD WENT OVER HOUSE

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
Mar 19, 2:39 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.8 hours before the alert went out and 161 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: 2784 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 528 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 18.4

Open this sounding in Storm Lab

The text

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

130 
WUUS54 KEWX 192250
SVREWX
TXC163-325-507-192345-
/O.NEW.KEWX.SV.W.0022.120319T2250Z-120319T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
550 PM CDT MON MAR 19 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FRIO COUNTY...
  SOUTHWESTERN MEDINA COUNTY...
  NORTHEASTERN ZAVALA COUNTY...

* UNTIL 645 PM CDT.

* AT 546 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM
  WAS LOCATED 9 MILES WEST OF BLUFF...OR 11 MILES EAST OF
  BATESVILLE...AND MOVING NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE FRIO TOWN...PEARSALL...MOORE
  AND YANCEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT MONDAY EVENING
FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 2937 9911 2896 9887 2877 9944 2894 9956
TIME...MOT...LOC 2250Z 234DEG 22KT 2891 9942

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 19, 2:30 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	45 min
Mar 19, 3:06 PM CDT	Tornado Warning	EWX	Edwards, Val Verde	39 min
Mar 19, 4:52 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	53 min
Mar 19, 5:18 PM CDT	Tornado Warning	EWX	Edwards	42 min
Mar 19, 5:29 PM CDT	Severe Thunderstorm Warning	EWX	Medina, Uvalde	49 min
Mar 19, 5:53 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	32 min
Mar 19, 6:03 PM CDT	Tornado Warning	EWX	Llano	27 min
Mar 19, 6:07 PM CDT	Tornado Warning	EWX	Frio, Medina	38 min
Mar 19, 6:10 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr, Medina, Uvalde	50 min
Mar 19, 6:23 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	67 min
Mar 19, 6:33 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr, Real	57 min
Mar 19, 6:45 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina	60 min
Mar 19, 6:54 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr	55 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.