Alert archive / Texas / Tornado Watches in 2019

Tornado Watch 202

May 20, 201939 counties in Texas

The Storm Prediction Center issued this tornado watch at May 20, 2019, 9:52 PM CDT for 39 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2019, 9:52 PM CDT (02:52 UTC)
Expired: May 21, 2019, 4:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 39 counties

Borden County, TX, Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Ector County, TX, Fisher County, TX, Garza County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Lynn County, TX, Martin County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX

The radar

The San Angelo radar (KSJT), 91 km from the middle of the area, began a volume at 02:52 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: 50%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 70%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 20, 9:52 PM CDT	Tornado Warning	SJT	Haskell	23 min
May 20, 9:59 PM CDT	Tornado Warning Considerable damage threat	SJT	Fisher, Jones	31 min
May 20, 10:06 PM CDT	Tornado Warning	SJT	Fisher	24 min
May 20, 10:13 PM CDT	Severe Thunderstorm Warning	MAF	Borden, Dawson, Ector, Glasscock, Howard, Martin and 1 more	62 min
May 20, 10:17 PM CDT	Flash Flood Warning	MAF	Ector, Martin, Midland	3 hr
May 20, 10:17 PM CDT	Tornado Warning	SJT	Haskell, Jones	28 min
May 20, 10:18 PM CDT	Tornado Warning	LUB	Stonewall	12 min
May 20, 10:18 PM CDT	Tornado Warning	MAF	Midland	27 min
May 20, 10:23 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	22 min
May 20, 10:39 PM CDT	Tornado Warning	SJT	Haskell	36 min
May 20, 10:45 PM CDT	Severe Thunderstorm Warning	MAF	Borden, Howard, Mitchell, Scurry	60 min
May 20, 10:53 PM CDT	Tornado Warning	MAF	Borden, Scurry	22 min
May 20, 10:59 PM CDT	Severe Thunderstorm Warning	SJT	Haskell	46 min
May 20, 11:11 PM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Midland	34 min
May 20, 11:18 PM CDT	Severe Thunderstorm Warning	SJT	Fisher, Jones	57 min
May 20, 11:27 PM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Midland, Upton	48 min
May 20, 11:35 PM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Midland, Reagan, Upton	40 min
May 20, 11:40 PM CDT	Severe Thunderstorm Warning	LUB	Dickens, Kent, King, Stonewall	50 min
May 20, 11:58 PM CDT	Flash Flood Warning	MAF	Borden, Glasscock, Howard, Martin, Mitchell, Scurry	3 hr
May 21, 12:12 AM CDT	Severe Thunderstorm Warning	MAF	Glasscock, Reagan, Upton	48 min
May 21, 12:17 AM CDT	Flash Flood Warning	SJT	Fisher, Haskell, Jones, Nolan, Taylor	4 hr
May 21, 12:27 AM CDT	Severe Thunderstorm Warning	SJT	Coke, Sterling	48 min
May 21, 12:49 AM CDT	Tornado Warning	SJT	Crockett	26 min
May 21, 12:53 AM CDT	Tornado Warning	MAF	Reagan	23 min
May 21, 1:33 AM CDT	Tornado Warning	SJT	Crockett, Irion, Schleicher	12 min
May 21, 1:39 AM CDT	Tornado Warning	SJT	Crockett, Irion, Schleicher	21 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

Del Rio, TX (KDLF), launched 00:00Z, 2.9 hours before the alert went out and 314 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: 3800 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1510 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 325 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 25.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 8:22 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Foard, Hardeman, Knox and 3 more	53 min
May 20, 8:53 PM CDT	Mesoscale Discussion	SPC	Borden, Dawson, Fisher, Garza, Glasscock, Haskell and 15 more	97 min
May 20, 10:07 PM CDT	Tornado Watch	SPC	Archer, Baylor, Clay, Knox, Wichita, Wilbarger	9 hr
May 20, 11:31 PM CDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Coleman, Crane, Crockett and 25 more	59 min
May 20, 11:41 PM CDT	Mesoscale Discussion	SPC	Borden, Callahan, Coke, Coleman, Crane, Crockett and 25 more	64 min
May 21, 2:24 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Brown, Callahan, Clay, Coleman and 23 more	96 min
May 21, 7:26 AM CDT	Mesoscale Discussion	SPC	Bowie, Fannin, Lamar, Red River	94 min

Nearby

Tornado Watches in Texas, 2019 Every tornado watch in 2019

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.