Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 2, NWS Austin/San Antonio, TX

February 25, 2018Frio County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Feb 25, 2018, 4:43 AM CST for Frio County, Texas. It was in force for 47 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: Feb 25, 2018, 4:43 AM CST (10:43 UTC)
Expired: Feb 25, 2018, 5:30 AM CST
In force: 47 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Frio County, TX

The radar

The Laughlin AFB radar (KDFX), 117 km from the middle of the area, began a volume at 10:44 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 nearest sounding before it

Del Rio, TX (KDLF), launched 00:00Z, 10.7 hours before the alert went out and 170 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: 448 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1512 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -99 m²/s²
0-3 km storm-relative helicity: -16 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -2.3

Open this sounding in Storm Lab

The text

As transmitted.

873 
WUUS54 KEWX 251043
SVREWX
TXC163-251130-
/O.NEW.KEWX.SV.W.0002.180225T1043Z-180225T1130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
443 AM CST SUN FEB 25 2018

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Southwestern Frio County in south central Texas...

* Until 530 AM CST

* At 443 AM CST, a severe thunderstorm was located over Divot, or
  near Dilley, moving northeast at 50 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees. 

* Locations impacted include...
  Pearsall, Dilley, Divot, Derby and Bluff. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2864 9937 2884 9937 2899 9918 2869 9900
      2864 9918
TIME...MOT...LOC 1043Z 243DEG 45KT 2874 9925 

HAIL...1.50IN
WIND...60MPH
 
$$

TB3

3 follow-up statements

220 
WWUS54 KEWX 251101
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
501 AM CST SUN FEB 25 2018

TXC163-251130-
/O.CON.KEWX.SV.W.0002.000000T0000Z-180225T1130Z/
Frio TX-
501 AM CST SUN FEB 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM CST
FOR CENTRAL FRIO COUNTY...

At 500 AM CST, a severe thunderstorm was located near Pearsall,
moving northeast at 40 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Pearsall, Derby and Bluff. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

LAT...LON 2868 9914 2888 9930 2899 9918 2869 9900
TIME...MOT...LOC 1100Z 243DEG 45KT 2883 9906 

HAIL...1.25IN
WIND...60MPH
 
$$

TB3

459 
WWUS54 KEWX 251108
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
508 AM CST SUN FEB 25 2018

TXC163-251130-
/O.CON.KEWX.SV.W.0002.000000T0000Z-180225T1130Z/
Frio TX-
508 AM CST SUN FEB 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM CST
FOR SOUTH CENTRAL FRIO COUNTY...

At 508 AM CST, a severe thunderstorm was located near Goldfinch, or 8
miles east of Pearsall, moving northeast at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Derby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

LAT...LON 2868 9912 2886 9914 2887 9911 2869 9900
TIME...MOT...LOC 1108Z 243DEG 45KT 2888 9895 

HAIL...1.00IN
WIND...60MPH
 
$$

TB3

699 
WWUS54 KEWX 251121
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
521 AM CST SUN FEB 25 2018

TXC163-251130-
/O.EXP.KEWX.SV.W.0002.000000T0000Z-180225T1130Z/
Frio TX-
521 AM CST SUN FEB 25 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL FRIO COUNTY WILL
EXPIRE AT 530 AM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

Remember, a Severe Thunderstorm Warning still remains in effect for
southeast Frio county until 545 AM CST.

LAT...LON 2868 9912 2886 9914 2887 9911 2869 9900
TIME...MOT...LOC 1120Z 243DEG 45KT 2895 9880 

$$

TB3

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 24, 6:21 PM CST	Special Weather Statement	EWX	Burnet	39 min
Feb 25, 12:11 AM CST	Special Weather Statement	EWX	DeWitt	34 min
Feb 25, 12:50 AM CST	Special Weather Statement	EWX	Lavaca	40 min
Feb 25, 1:48 AM CST	Special Weather Statement	EWX	Wilson	42 min
Feb 25, 2:31 AM CST	Special Weather Statement	EWX	DeWitt	44 min
Feb 25, 3:42 AM CST	Special Weather Statement	EWX	Zavala	48 min
Feb 25, 4:30 AM CST	Severe Thunderstorm Warning	EWX	Frio, Zavala	30 min
Feb 25, 4:55 AM CST	Special Weather Statement	EWX	Medina	50 min
Feb 25, 5:04 AM CST	Severe Thunderstorm Warning	EWX	Atascosa, Frio	41 min
Feb 25, 5:30 AM CST	Severe Thunderstorm Warning	EWX	Bandera, Medina	45 min
Feb 25, 5:41 AM CST	Severe Thunderstorm Warning	EWX	Atascosa	49 min
Feb 25, 6:10 AM CST	Severe Thunderstorm Warning	EWX	Atascosa, Karnes, Wilson	50 min
Feb 25, 6:13 AM CST	Special Weather Statement	EWX	Bandera	47 min
Feb 25, 6:35 AM CST	Special Weather Statement	EWX	Caldwell	40 min
Feb 25, 6:43 AM CST	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes, Wilson	32 min
Feb 25, 6:55 AM CST	Special Weather Statement	EWX	Llano	50 min
Feb 25, 7:07 AM CST	Special Weather Statement	EWX	DeWitt	23 min
Feb 25, 11:11 AM CST	Special Weather Statement	EWX	Williamson	34 min
Feb 25, 11:44 AM CST	Special Weather Statement	EWX	Guadalupe	31 min
Feb 25, 11:54 AM CST	Special Weather Statement	EWX	Williamson	36 min
Feb 25, 12:13 PM CST	Special Weather Statement	EWX	Caldwell	32 min
Feb 25, 12:49 PM CST	Special Weather Statement	EWX	Bastrop	41 min
Feb 25, 12:50 PM CST	Special Weather Statement	EWX	Karnes	40 min
Feb 25, 1:31 PM CST	Special Weather Statement	EWX	Fayette	44 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.