Alert archive / Texas / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 20
The Storm Prediction Center issued this severe thunderstorm watch at Mar 26, 2018, 2:56 PM CDT for 25 counties in Texas. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 26, 2018, 2:56 PM CDT (19:56 UTC)
- Expired
- Mar 27, 2018, 2:00 AM CDT
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 25 counties
Callahan County, TX, Coke County, TX, Crane County, TX, Crockett County, TX, Fisher County, TX, Glasscock County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones 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, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Upton County, TX
The radar
The San Angelo radar (KSJT), 50 km from the middle of the area, began a volume at 19:58 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- 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
- 50%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 3:24 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones | 33 min |
| Mar 26, 4:12 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Throckmorton | 48 min |
| Mar 26, 4:43 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 47 min |
| Mar 26, 4:56 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 34 min |
| Mar 26, 5:28 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 32 min |
| Mar 26, 5:51 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 35 min |
| Mar 26, 6:08 PM CDT | Severe Thunderstorm Warning | MAF | Mitchell | 28 min |
| Mar 26, 6:16 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Sterling | 44 min |
| Mar 26, 6:26 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Nolan | 49 min |
| Mar 26, 6:53 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 52 min |
| Mar 26, 7:00 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan, Sterling | 45 min |
| Mar 26, 7:13 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Haskell, Jones | 47 min |
| Mar 26, 7:17 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Jones, Nolan, Taylor | 33 min |
| Mar 26, 7:28 PM CDT | Severe Thunderstorm Warning | MAF | Crane, Upton | 62 min |
| Mar 26, 7:45 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan, Taylor | 45 min |
| Mar 26, 8:04 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Shackelford, Throckmorton | 26 min |
| Mar 26, 8:30 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 45 min |
| Mar 26, 8:43 PM CDT | Severe Thunderstorm Warning | MAF | Reagan, Upton | 62 min |
| Mar 26, 9:45 PM CDT | Severe Thunderstorm Warning | MAF | Reagan | 60 min |
| Mar 26, 11:32 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Irion, Tom Green | 58 min |
| Mar 27, 12:12 AM CDT | Severe Thunderstorm Warning | SJT | Callahan, Taylor | 48 min |
| Mar 27, 12:39 AM CDT | Severe Thunderstorm Warning | MAF | Pecos, Terrell | 23 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, 7.9 hours before the alert went out and 129 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
- 478 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1612 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 7:31 PM CDT | Mesoscale Discussion | SPC | Cooke, Montague | 59 min |
| Mar 26, 12:07 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Fisher, Haskell, Jones and 11 more | 2 hr |
| Mar 26, 12:37 PM CDT | Severe Thunderstorm Watch | SPC | Archer, Baylor, Callahan, Clay, Cooke, Fisher and 17 more | 8 hr |
| Mar 26, 2:11 PM CDT | Mesoscale Discussion | SPC | Coke, Crockett, Glasscock, Irion, Pecos, Reagan and 4 more | 2 hr |
| Mar 26, 3:31 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Fisher, Haskell, Wichita | 59 min |
| Mar 26, 5:44 PM CDT | Mesoscale Discussion | SPC | Coke, Crane, Crockett, Glasscock, Irion, Midland and 9 more | 2 hr |
| Mar 26, 6:53 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Clay, Cooke, Fisher and 16 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2018Every severe thunderstorm watch 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.