Alert archive / Texas / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 486
The Storm Prediction Center issued this severe thunderstorm watch at Sep 17, 2017, 2:41 PM MDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 17, 2017, 2:41 PM MDT (20:41 UTC)
- Expired
- Sep 17, 2017, 10:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 61 counties
Baca County, CO, Bent County, CO, Huerfano County, CO, Las Animas County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO, Chaves County, NM, Colfax County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Harding County, NM, Lea County, NM, Mora County, NM, Quay County, NM, Roosevelt County, NM, San Miguel County, NM, Union County, NM, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dallam County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hartley County, TX, Hockley County, TX, Hutchinson County, TX, Kent County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Moore County, TX, Motley County, TX, Ochiltree County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX
The radar
The Amarillo radar (KAMA), 127 km from the middle of the area, began a volume at 20:43 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
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 2:58 PM MDT | Severe Thunderstorm Warning | ABQ | Colfax, Harding, Mora | 30 min |
| Sep 17, 2:59 PM MDT | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham, Potter, Randall | 61 min |
| Sep 17, 3:07 PM MDT | Severe Thunderstorm Warning | LUB | Parmer | 23 min |
| Sep 17, 3:22 PM MDT | Severe Thunderstorm Warning | AMA | Deaf Smith | 53 min |
| Sep 17, 3:32 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas | 43 min |
| Sep 17, 3:53 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas | 37 min |
| Sep 17, 3:58 PM MDT | Severe Thunderstorm Warning | LUB | Hockley, Lamb | 32 min |
| Sep 17, 4:08 PM MDT | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham | 67 min |
| Sep 17, 4:24 PM MDT | Severe Thunderstorm Warning | AMA | Hartley, Moore, Oldham, Potter | 66 min |
| Sep 17, 4:26 PM MDT | Severe Thunderstorm Warning | LUB | Hale, Hockley, Lamb, Lubbock | 49 min |
| Sep 17, 4:42 PM MDT | Severe Thunderstorm Warning | PUB | Baca, Las Animas | 37 min |
| Sep 17, 4:46 PM MDT | Severe Thunderstorm Warning | AMA | Hartley, Oldham | 59 min |
| Sep 17, 5:16 PM MDT | Severe Thunderstorm Warning | ABQ | Quay | 14 min |
| Sep 17, 5:17 PM MDT | Severe Thunderstorm Warning | AMA | Deaf Smith, Oldham | 41 min |
| Sep 17, 6:17 PM MDT | Severe Thunderstorm Warning | LUB | Crosby, Dickens, Floyd, Motley | 43 min |
| Sep 17, 6:50 PM MDT | Severe Thunderstorm Warning | ABQ | Colfax, Union | 40 min |
| Sep 17, 7:23 PM MDT | Severe Thunderstorm Warning | ABQ | Union | 52 min |
| Sep 17, 7:29 PM MDT | Severe Thunderstorm Warning | ABQ | Union | 46 min |
| Sep 17, 7:58 PM MDT | Severe Thunderstorm Warning | LUB | Cottle, Motley | 62 min |
| Sep 17, 8:09 PM MDT | Severe Thunderstorm Warning | ABQ | Union | 51 min |
| Sep 17, 8:20 PM MDT | Severe Thunderstorm Warning | AMA | Cimarron | 55 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 8.7 hours before the alert went out and 128 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
- 240 J/kg
- Mixed-layer CIN
- -249 J/kg
- Mixed-layer LCL
- 1391 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 4:44 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Crowley, Las Animas, Otero | 91 min |
| Sep 16, 6:32 PM MDT | Mesoscale Discussion | SPC | Brown, Dickinson, Geary, Harvey, Jackson, McPherson and 6 more | 118 min |
| Sep 17, 1:28 PM MDT | Mesoscale Discussion | SPC | Chaves, Colfax, Curry, De Baca, Guadalupe, Harding and 5 more | 2 hr |
| Sep 17, 1:16 PM MDT | Mesoscale Discussion | SPC | Atoka, Beckham, Caddo, Canadian, Carter, Cleveland and 32 more | 119 min |
Nearby
Severe Thunderstorm Watches in Texas, 2017Severe Thunderstorm Watches in New Mexico, 2017Severe Thunderstorm Watches in Colorado, 2017Every 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.