Alert archive / Texas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 96

March 28, 201784 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Mar 28, 2017, 9:28 PM CDT for 84 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Mar 28, 2017, 9:28 PM CDT (02:28 UTC)
Expired: Mar 29, 2017, 5:00 AM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 84 counties

Atascosa County, TX, Bandera County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Collin County, TX, Comal County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Crockett County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Dimmit County, TX, Eastland County, TX, Edwards County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Fisher County, TX, Frio County, TX, Gillespie County, TX, Grayson County, TX, Guadalupe County, TX, Hamilton County, TX, Haskell County, TX, Hays County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, Kaufman County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lamar County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, McLennan County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Real County, TX, Rockwall County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sutton County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Van Zandt County, TX, Williamson County, TX, Wilson County, TX, Wise County, TX, Young County, TX, Zavala County, TX

The radar

The Dyess AFB radar (KDYX), 118 km from the middle of the area, began a volume at 02:32 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Mar 28, 9:29 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	35 min
Mar 28, 9:30 PM CDT	Tornado Warning	SJT	Fisher, Jones, Nolan, Taylor	30 min
Mar 28, 9:41 PM CDT	Severe Thunderstorm Warning	SJT	Coleman, Runnels	49 min
Mar 28, 9:41 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones, Nolan, Taylor	64 min
Mar 28, 10:02 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	58 min
Mar 28, 10:14 PM CDT	Severe Thunderstorm Warning	SJT	Callahan, Haskell, Jones, Shackelford, Taylor, Throckmorton	61 min
Mar 28, 11:04 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	56 min
Mar 28, 11:09 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, Menard	51 min
Mar 28, 11:25 PM CDT	Tornado Warning	EWX	Kinney	35 min
Mar 28, 11:32 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Gillespie, Kerr, Real	58 min
Mar 28, 11:33 PM CDT	Severe Thunderstorm Warning	SJT	Kimble, McCulloch, Mason, Menard, San Saba	57 min
Mar 28, 11:47 PM CDT	Tornado Warning	EWX	Kinney, Uvalde	28 min
Mar 28, 11:55 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick, Uvalde, Zavala	65 min
Mar 29, 12:12 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Real, Uvalde	63 min
Mar 29, 12:25 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 1 more	52 min
Mar 29, 1:04 AM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hamilton	56 min
Mar 29, 1:08 AM CDT	Severe Thunderstorm Warning	FWD	Jack, Wise	52 min
Mar 29, 1:13 AM CDT	Severe Thunderstorm Warning	FWD	Erath, Hood, Somervell	47 min
Mar 29, 1:24 AM CDT	Severe Thunderstorm Warning	FWD	Parker	36 min
Mar 29, 1:25 AM CDT	Tornado Warning	FWD	Erath, Hood, Somervell	35 min
Mar 29, 1:40 AM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hill, Johnson	51 min
Mar 29, 1:49 AM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	41 min
Mar 29, 2:04 AM CDT	Tornado Warning	FWD	Tarrant	26 min
Mar 29, 2:13 AM CDT	Tornado Warning	FWD	Denton, Tarrant	18 min
Mar 29, 2:14 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Hill, Johnson	61 min
Mar 29, 2:26 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas, Denton	49 min
Mar 29, 2:46 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Kaufman, Rockwall	59 min
Mar 29, 2:47 AM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	58 min
Mar 29, 2:52 AM CDT	Severe Thunderstorm Warning	FWD	Collin	53 min
Mar 29, 3:16 AM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman, Rains, Van Zandt	44 min
Mar 29, 3:26 AM CDT	Severe Thunderstorm Warning	FWD	Fannin	34 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 237 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: 822 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1580 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 289 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 14.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 28, 7:45 PM CDT	Mesoscale Discussion	SPC	Armstrong, Briscoe, Carson, Castro, Crosby, Deaf Smith and 9 more	60 min
Mar 28, 9:07 PM CDT	Mesoscale Discussion	SPC	Bandera, Bexar, Blanco, Brown, Burnet, Callahan and 37 more	23 min
Mar 28, 10:21 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	7 hr
Mar 28, 10:25 PM CDT	Mesoscale Discussion	SPC	Archer, Clay, Cooke, Montague, Wichita	65 min
Mar 28, 11:58 PM CDT	Mesoscale Discussion	SPC	Anderson, Bastrop, Bell, Bexar, Blanco, Bosque and 29 more	92 min
Mar 29, 2:54 AM CDT	Mesoscale Discussion	SPC	Collin, Delta, Fannin, Franklin, Grayson, Hopkins and 7 more	96 min
Mar 29, 8:23 AM CDT	Mesoscale Discussion	SPC	Brazoria, Calhoun, Chambers, Fort Bend, Galveston, Hardin and 12 more	67 min
Mar 29, 1:31 PM CDT	Mesoscale Discussion	SPC	Brazoria, Chambers, Galveston, Hardin, Harris, Jasper and 7 more	2 hr
Mar 29, 2:11 PM CDT	Tornado Watch	SPC	Angelina, Chambers, Galveston, Hardin, Jasper, Jefferson and 6 more	7 hr
Mar 29, 4:17 PM CDT	Tornado Watch	SPC	Bowie, Cass, Morris	8 hr
Mar 29, 5:50 PM CDT	Mesoscale Discussion	SPC	Jasper, Newton, Orange	115 min

Nearby

Severe Thunderstorm Watches in Texas, 2017 Every severe thunderstorm watch in 2017

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.