Alert archive / Texas / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 472
The Storm Prediction Center issued this severe thunderstorm watch at Aug 27, 2017, 3:27 PM CDT for 15 counties in Kansas; 8 counties in Oklahoma; 16 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2017, 3:27 PM CDT (20:27 UTC)
- Expired
- Aug 27, 2017, 11:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 39 counties
Clark County, KS, Comanche County, KS, Edwards County, KS, Finney County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Kiowa County, KS, Meade County, KS, Pawnee County, KS, Seward County, KS, Stevens County, KS, Beaver County, OK, Beckham County, OK, Ellis County, OK, Harper County, OK, Roger Mills County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX
The radar
The Dodge City radar (KDDC), 132 km from the middle of the area, began a volume at 20:30 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
- 40%
- 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 3:44 PM CDT | Severe Thunderstorm Warning | DDC | Finney, Ford, Gray, Hodgeman | 61 min |
| Aug 27, 4:45 PM CDT | Severe Thunderstorm Warning | DDC | Finney, Gray, Haskell | 60 min |
| Aug 27, 5:35 PM CDT | Severe Thunderstorm Warning | DDC | Haskell, Seward | 41 min |
| Aug 27, 6:11 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 30 min |
| Aug 27, 6:38 PM CDT | Severe Thunderstorm Warning | DDC | Grant, Morton, Stevens | 52 min |
| Aug 27, 7:14 PM CDT | Severe Thunderstorm Warning | DDC | Morton, Stevens | 46 min |
| Aug 27, 7:25 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron, Texas | 65 min |
| Aug 27, 7:44 PM CDT | Severe Thunderstorm Warning | AMA | Texas | 46 min |
| Aug 27, 8:30 PM CDT | Severe Thunderstorm Warning | AMA | Cimarron, Texas | 60 min |
| Aug 27, 9:19 PM CDT | Severe Thunderstorm Warning | AMA | Dallam, Hartley, Moore, Sherman | 56 min |
| Aug 27, 9:50 PM CDT | Severe Thunderstorm Warning | AMA | Hartley, Moore, Oldham, Potter | 55 min |
| Aug 27, 10:37 PM CDT | Severe Thunderstorm Warning | AMA | Oldham, Potter | 9 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
Dodge City, (KDDC), launched 12:00Z, 8.5 hours before the alert went out and 136 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
- 1325 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 1142 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 5:13 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellsworth, Geary and 16 more | 62 min |
| Aug 27, 1:57 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Finney, Ford, Grant, Gray and 7 more | 3 hr |
| Aug 26, 9:37 PM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 14 more | 113 min |
| Aug 27, 1:50 AM CDT | Tornado Watch | SPC | Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris and 5 more | 11 hr |
| Aug 27, 4:04 AM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Fort Bend, Galveston, Harris, Jefferson and 2 more | 56 min |
| Aug 27, 10:54 AM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 14 more | 3 hr |
| Aug 27, 12:40 PM CDT | Tornado Watch | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 3 more | 13 hr |
| Aug 27, 3:07 PM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 5 more | 113 min |
| Aug 27, 6:04 PM CDT | Mesoscale Discussion | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 3 more | 116 min |
Nearby
Severe Thunderstorm Watches in Texas, 2017Severe Thunderstorm Watches in Kansas, 2017Severe Thunderstorm Watches in Oklahoma, 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.