Alert archive / Texas / Severe Thunderstorm Watches in 2018
Severe Thunderstorm Watch 19
The Storm Prediction Center issued this severe thunderstorm watch at Mar 26, 2018, 12:37 PM CDT for 17 counties in Oklahoma; 23 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 26, 2018, 12:37 PM CDT (17:37 UTC)
- Expired
- Mar 26, 2018, 9:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 60 kt
All 40 counties
Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Cooke County, TX, Fisher County, TX, Haskell County, TX, Howard County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX
The radar
The Altus AFB radar (KFDR), 80 km from the middle of the area, began a volume at 17:37 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
- 5%
- 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
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 1:10 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 50 min |
| Mar 26, 1:26 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 49 min |
| Mar 26, 1:51 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford | 39 min |
| Mar 26, 2:09 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 51 min |
| Mar 26, 2:20 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 40 min |
| Mar 26, 2:23 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Throckmorton | 37 min |
| Mar 26, 2:41 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor | 49 min |
| Mar 26, 2:43 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Nolan | 32 min |
| Mar 26, 2:48 PM CDT | Severe Thunderstorm Warning | OUN | Cotton | 25 min |
| Mar 26, 3:24 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Wichita | 24 min |
| 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, 5:19 PM CDT | Severe Thunderstorm Warning | FWD | Young | 56 min |
| Mar 26, 5:28 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 32 min |
| Mar 26, 6:08 PM CDT | Severe Thunderstorm Warning | MAF | Mitchell | 28 min |
| Mar 26, 6:14 PM CDT | Severe Thunderstorm Warning | FWD | Jack, Young | 46 min |
| Mar 26, 6:26 PM CDT | Severe Thunderstorm Warning | SJT | Fisher, Nolan | 49 min |
| Mar 26, 6:44 PM CDT | Severe Thunderstorm Warning | FWD | Jack, Montague, Wise | 46 min |
| Mar 26, 6:53 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 52 min |
| Mar 26, 6:54 PM CDT | Severe Thunderstorm Warning | OUN | Archer | 36 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, 7:45 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, 8:34 PM CDT | Severe Thunderstorm Warning | FWD | Stephens, Young | 56 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 12:00Z, 5.6 hours before the alert went out and 163 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
- 215 J/kg
- Mixed-layer CIN
- -417 J/kg
- Mixed-layer LCL
- 624 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.9
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 | Love | 59 min |
| Mar 26, 12:07 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Grady, Jefferson, Stephens, Tillman | 2 hr |
| Mar 26, 3:31 PM CDT | Mesoscale Discussion | SPC | Cotton | 59 min |
| Mar 26, 6:53 PM CDT | Mesoscale Discussion | SPC | Carter, Cotton, Jefferson, Love, Marshall | 2 hr |
| Mar 26, 2:11 PM CDT | Mesoscale Discussion | SPC | Coke, Crockett, Glasscock, Irion, Pecos, Reagan and 4 more | 2 hr |
| Mar 26, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | Callahan, Coke, Crane, Crockett, Fisher, Glasscock and 19 more | 11 hr |
| Mar 26, 5:44 PM CDT | Mesoscale Discussion | SPC | Coke, Crane, Crockett, Glasscock, Irion, Midland and 9 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2018Severe Thunderstorm Watches in Oklahoma, 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.