Alert archive / Texas / Tornado Warnings in 2018

Tornado Warning 2, NWS Austin/San Antonio, TX

April 6, 2018Burnet County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Apr 6, 2018, 7:50 PM CDT for Burnet County, Texas. It was in force for 25 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: Apr 6, 2018, 7:50 PM CDT (00:50 UTC)
Expired: Apr 6, 2018, 8:15 PM CDT
In force: 25 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.5 in

County Burnet County, TX

The radar

The Ft Hood radar (KGRK), 60 km from the middle of the area, began a volume at 00:49 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
Apr 6, 7:51 PM CDT	TORNADO	8 Nw Briggs, TX	TRAINED SPOTTER REPORTS TORNADO NW OF BRIGGS JUST NORTH OF US 183 IN NORTHEASTERN BURNET COUNTY.

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.8 hours before the alert went out and 217 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: 690 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1896 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

558 
WFUS54 KEWX 070050
TOREWX
TXC053-070115-
/O.NEW.KEWX.TO.W.0002.180407T0050Z-180407T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Austin/San Antonio TX
750 PM CDT FRI APR 6 2018

The National Weather Service in Austin San Antonio has issued a

* Tornado Warning for...
  Northeastern Burnet County in south central Texas...

* Until 815 PM CDT

* At 750 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Watson, or 10 miles southeast of Lampasas, moving
  southeast at 30 mph.

  HAZARD...Tornado and ping pong ball size hail. 

  SOURCE...Weather spotters reported funnel cloud. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Briggs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3097 9786 3085 9790 3098 9809 3103 9805
TIME...MOT...LOC 0050Z 292DEG 25KT 3099 9803 

TORNADO...RADAR INDICATED
HAIL...1.50IN

$$

PLATT

2 follow-up statements

606 
WWUS54 KEWX 070056
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
756 PM CDT FRI APR 6 2018

TXC053-070115-
/O.CON.KEWX.TO.W.0002.000000T0000Z-180407T0115Z/
Burnet TX-
756 PM CDT FRI APR 6 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
NORTHEASTERN BURNET COUNTY...
        
At 755 PM CDT, a confirmed tornado was located 4 miles northwest of 
Watson, or 9 miles southeast of Lampasas, moving east at 25 mph.

HAZARD...Damaging tornado and ping pong ball size hail. 

SOURCE...Radar confirmed tornado. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Briggs and Watson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3097 9786 3085 9790 3097 9808 3102 9804
TIME...MOT...LOC 0055Z 291DEG 23KT 3098 9801 

TORNADO...OBSERVED
HAIL...1.50IN

$$

PLATT

715 
WWUS54 KEWX 070117
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
817 PM CDT FRI APR 6 2018

TXC053-070126-
/O.EXP.KEWX.TO.W.0002.000000T0000Z-180407T0115Z/
Burnet TX-
817 PM CDT FRI APR 6 2018

...THE TORNADO WARNING FOR NORTHEASTERN BURNET COUNTY HAS EXPIRED...
        
The storm which prompted the tornado warning has weakened below 
severe limits, and has exited the warned area. Therefore, the 
warning has been allowed to expire.  However small hail and gusty 
winds are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Austin San Antonio.

LAT...LON 3097 9786 3085 9790 3097 9808 3102 9804
TIME...MOT...LOC 0116Z 292DEG 25KT 3093 9787 

$$

PLATT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 7:29 PM CDT	Special Weather Statement	EWX	Burnet	46 min
Apr 6, 7:34 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	41 min
Apr 6, 8:16 PM CDT	Special Weather Statement	EWX	Williamson	44 min
Apr 6, 8:51 PM CDT	Special Weather Statement	EWX	Williamson	24 min
Apr 6, 11:12 PM CDT	Special Weather Statement	EWX	Williamson	48 min
Apr 6, 11:32 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	43 min
Apr 7, 12:16 AM CDT	Special Weather Statement	EWX	Bastrop	44 min

Nearby

Tornado Warnings in Texas, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.