Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 20
The Storm Prediction Center issued this severe thunderstorm watch at Feb 27, 2011, 1:12 PM CST for 28 counties in Kansas; 21 counties in Missouri. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 27, 2011, 1:12 PM CST (19:12 UTC)
- Expired
- Feb 27, 2011, 10:03 PM CST
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 49 counties
Allen County, KS, Anderson County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Douglas County, KS, Franklin County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Jefferson County, KS, Johnson County, KS, Kingman County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Reno County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Woodson County, KS, Wyandotte County, KS, Bates County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Henry County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Pettis County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO
The radar
The Pleasant Hill radar (KEAX), 58 km from the middle of the area, began a volume at 19:14 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
- 10%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 1:36 PM CST | Severe Thunderstorm Warning | ICT | Butler, Chase, Marion, Sedgwick | 54 min |
| Feb 27, 2:07 PM CST | Severe Thunderstorm Warning | ICT | Butler, Chase, Greenwood | 53 min |
| Feb 27, 2:32 PM CST | Severe Thunderstorm Warning | TOP | Lyon, Osage | 28 min |
| Feb 27, 3:07 PM CST | Severe Thunderstorm Warning | TOP | Anderson, Coffey, Franklin, Osage | 23 min |
| Feb 27, 3:20 PM CST | Severe Thunderstorm Warning | TOP | Anderson, Franklin | 25 min |
| Feb 27, 3:26 PM CST | Severe Thunderstorm Warning | EAX | Linn, Miami | 34 min |
| Feb 27, 3:51 PM CST | Severe Thunderstorm Warning | EAX | Cass | 39 min |
| Feb 27, 4:04 PM CST | Flash Flood Warning | TOP | Douglas, Franklin | 116 min |
| Feb 27, 4:38 PM CST | Severe Thunderstorm Warning | ICT | Kingman | 26 min |
| Feb 27, 4:49 PM CST | Severe Thunderstorm Warning | ICT | Harvey, Reno, Sedgwick | 41 min |
| Feb 27, 4:50 PM CST | Severe Thunderstorm Warning | EAX | Johnson, Lafayette, Pettis, Saline | 25 min |
| Feb 27, 4:59 PM CST | Severe Thunderstorm Warning | ICT | Harper, Sumner | 36 min |
| Feb 27, 5:25 PM CST | Severe Thunderstorm Warning | ICT | Butler, Chase, Marion | 47 min |
| Feb 27, 5:57 PM CST | Severe Thunderstorm Warning | EAX | Randolph | 18 min |
| Feb 27, 6:05 PM CST | Severe Thunderstorm Warning | ICT | Greenwood | 41 min |
| Feb 27, 6:31 PM CST | Severe Thunderstorm Warning | ICT | Butler, Sedgwick | 24 min |
| Feb 27, 6:41 PM CST | Severe Thunderstorm Warning | ICT | Woodson | 16 min |
| Feb 27, 6:53 PM CST | Severe Thunderstorm Warning | ICT | Sedgwick, Sumner | 20 min |
| Feb 27, 7:05 PM CST | Severe Thunderstorm Warning | TOP | Anderson | 25 min |
| Feb 27, 7:15 PM CST | Severe Thunderstorm Warning | EAX | Linn | 30 min |
| Feb 27, 8:18 PM CST | Severe Thunderstorm Warning | ICT | Greenwood | 42 min |
| Feb 27, 8:34 PM CST | Severe Thunderstorm Warning | ICT | Elk, Greenwood, Wilson | 13 min |
| Feb 27, 8:35 PM CST | Severe Thunderstorm Warning | ICT | Woodson | 40 min |
| Feb 27, 8:52 PM CST | Severe Thunderstorm Warning | ICT | Allen | 31 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
Topeka, KS (KTOP), launched 12:00Z, 7.2 hours before the alert went out and 64 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 382 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 505 m²/s²
- 0-3 km storm-relative helicity
- 498 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 |
|---|---|---|---|---|
| Feb 27, 12:46 PM CST | Mesoscale Discussion | SPC | Anderson, Butler, Chase, Coffey, Douglas, Franklin and 20 more | 59 min |
| Feb 27, 2:12 PM CST | Mesoscale Discussion | SPC | Bourbon, Chautauqua, Cherokee, Cowley, Crawford, Labette and 3 more | 93 min |
| Feb 27, 2:46 PM CST | Tornado Watch | SPC | Chautauqua, Cowley, Elk, Labette, Montgomery, Neosho and 2 more | 8 hr |
| Feb 27, 3:24 PM CST | Mesoscale Discussion | SPC | Anderson, Butler, Chase, Coffey, Douglas, Franklin and 20 more | 66 min |
| Feb 27, 5:49 PM CST | Mesoscale Discussion | SPC | Chautauqua, Cowley, Elk, Montgomery, Wilson | 56 min |
| Feb 27, 12:44 PM CST | Mesoscale Discussion | SPC | Pemiscot | 91 min |
| Feb 27, 4:57 PM CST | Mesoscale Discussion | SPC | Barry, Bollinger, Butler, Cape Girardeau, Carter, Christian and 29 more | 2 hr |
| Feb 27, 5:10 PM CST | Mesoscale Discussion | SPC | Audrain, Boone, Macon, Marion, Monroe, Pike and 3 more | 35 min |
| Feb 27, 5:33 PM CST | Severe Thunderstorm Watch | SPC | Audrain, Boone, Knox, Lewis, Marion, Monroe and 3 more | 4 hr |
| Feb 27, 5:50 PM CST | Mesoscale Discussion | SPC | Harrison, Mercer, Putnam | 6 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2011Severe Thunderstorm Watches in Missouri, 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.