Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 772
The Storm Prediction Center issued this severe thunderstorm watch at Aug 12, 2011, 2:50 PM CDT for 37 counties in Kansas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2011, 2:50 PM CDT (19:50 UTC)
- Expired
- Aug 12, 2011, 10:06 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
All 37 counties
Barber County, KS, Barton County, KS, Butler County, KS, Chautauqua County, KS, Clark County, KS, Comanche County, KS, Cowley County, KS, Edwards County, KS, Elk County, KS, Finney County, KS, Ford County, KS, Gray County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Haskell County, KS, Hodgeman County, KS, Kingman County, KS, Kiowa County, KS, Lane County, KS, Marion County, KS, McPherson County, KS, Meade County, KS, Montgomery County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Rush County, KS, Scott County, KS, Sedgwick County, KS, Seward County, KS, Stafford County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS
The radar
The Dodge City radar (KDDC), 71 km from the middle of the area, began a volume at 19:52 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
- 5%
- Ten or more severe wind reports
- 40%
- 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
- 40%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:42 PM CDT | Severe Thunderstorm Warning | DDC | Hodgeman | 48 min |
| Aug 12, 3:56 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Pawnee | 49 min |
| Aug 12, 4:28 PM CDT | Severe Thunderstorm Warning | DDC | Ford, Hodgeman | 47 min |
| Aug 12, 4:38 PM CDT | Severe Thunderstorm Warning | DDC | Ford, Gray, Hodgeman | 67 min |
| Aug 12, 4:42 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Hodgeman, Pawnee | 48 min |
| Aug 12, 5:22 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Kiowa | 53 min |
| Aug 12, 5:33 PM CDT | Severe Thunderstorm Warning | DDC | Comanche | 57 min |
| Aug 12, 5:44 PM CDT | Severe Thunderstorm Warning | DDC | Barber, Pratt | 46 min |
| Aug 12, 6:08 PM CDT | Severe Thunderstorm Warning | DDC | Kiowa | 37 min |
| Aug 12, 6:14 PM CDT | Severe Thunderstorm Warning | ICT | Harper, Kingman | 76 min |
| Aug 12, 6:27 PM CDT | Severe Thunderstorm Warning | DDC | Barber, Pratt | 63 min |
| Aug 12, 6:54 PM CDT | Severe Thunderstorm Warning | ICT | McPherson, Saline | 66 min |
| Aug 12, 7:15 PM CDT | Severe Thunderstorm Warning | ICT | Harper, Kingman, Sumner | 60 min |
| Aug 12, 7:28 PM CDT | Severe Thunderstorm Warning | ICT | McPherson, Marion | 62 min |
| Aug 12, 7:51 PM CDT | Severe Thunderstorm Warning | ICT | Harvey | 54 min |
| Aug 12, 8:16 PM CDT | Severe Thunderstorm Warning | ICT | Butler, Chase, Marion | 59 min |
| Aug 12, 8:23 PM CDT | Severe Thunderstorm Warning | ICT | Butler, Sedgwick | 52 min |
| Aug 12, 8:58 PM CDT | Severe Thunderstorm Warning | ICT | Butler, Greenwood | 36 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, 7.8 hours before the alert went out and 65 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
- 2073 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 1:45 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more | 2 hr |
| Aug 12, 2:28 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Edwards, Finney, Ford and 13 more | 62 min |
Nearby
Severe Thunderstorm Watches in Kansas, 2011Every severe thunderstorm watch in 2011
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.