Alert archive / Texas / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 53
The Storm Prediction Center issued this severe thunderstorm watch at Mar 17, 2020, 4:41 PM CDT for 37 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 17, 2020, 4:41 PM CDT (21:41 UTC)
- Expired
- Mar 18, 2020, 12:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 37 counties
Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Dawson County, TX, Edwards 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, Martin County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Pecos 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, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 68 km from the middle of the area, began a volume at 21:42 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
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 5:58 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 62 min |
| Mar 17, 6:29 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford, Throckmorton | 31 min |
| Mar 17, 6:41 PM CDT | Severe Thunderstorm Warning | MAF | Pecos, Terrell | 49 min |
| Mar 17, 7:43 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 19 min |
| Mar 17, 7:49 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford, Throckmorton | 56 min |
| Mar 17, 8:38 PM CDT | Tornado Warning | SJT | Shackelford, Throckmorton | 37 min |
| Mar 17, 10:54 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Sterling, Tom Green | 51 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
Midland Regional, TX (KMAF), launched 12:00Z, 9.7 hours before the alert went out and 164 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.
- Mixed-layer CAPE
- 553 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 8:44 AM CDT | Severe Thunderstorm Watch | SPC | Cottle, Crosby, Dickens, Floyd, Garza, Hale and 9 more | 4 hr |
| Mar 17, 9:12 AM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 25 more | 93 min |
| Mar 17, 11:49 AM CDT | Mesoscale Discussion | SPC | Cottle, Crosby, Dickens, Floyd, Foard, Hale and 7 more | 86 min |
| Mar 17, 1:02 PM CDT | Severe Thunderstorm Watch | SPC | Baylor, Cottle, Dickens, Foard, Haskell, Kent and 5 more | 6 hr |
| Mar 17, 2:55 PM CDT | Mesoscale Discussion | SPC | Andrews, Crane, Ector, Terrell, Upton, Winkler | 3 hr |
| Mar 17, 3:01 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Fisher, Haskell, Jones, Kent and 11 more | 119 min |
Nearby
Severe Thunderstorm Watches in Texas, 2020Every severe thunderstorm watch in 2020
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.