Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 390
The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2011, 4:11 AM CDT for 23 counties in Kansas; 17 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 28, 2011, 4:11 AM CDT (09:11 UTC)
- Expired
- May 28, 2011, 8:53 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 40 counties
Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Harvey County, KS, Kingman County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Neosho County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Sedgwick County, KS, Stafford County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Laclede County, MO, Maries County, MO, Miller County, MO, Morgan County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Vernon County, MO
The radar
The Topeka radar (KTWX), 90 km from the middle of the area, began a volume at 09:13 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- 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
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 4:13 AM CDT | Severe Thunderstorm Warning | SGF | Cedar, St. Clair, Vernon | 47 min |
| May 28, 4:19 AM CDT | Severe Thunderstorm Warning | SGF | Polk | 26 min |
| May 28, 4:27 AM CDT | Severe Thunderstorm Warning | ICT | Butler, Greenwood | 48 min |
| May 28, 4:32 AM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey | 43 min |
| May 28, 4:45 AM CDT | Severe Thunderstorm Warning | ICT | Kingman, Reno, Sedgwick | 45 min |
| May 28, 5:06 AM CDT | Severe Thunderstorm Warning | TOP | Anderson | 39 min |
| May 28, 5:12 AM CDT | Severe Thunderstorm Warning | EAX | Linn | 33 min |
| May 28, 5:13 AM CDT | Severe Thunderstorm Warning | ICT | Greenwood, Woodson | 32 min |
| May 28, 5:41 AM CDT | Severe Thunderstorm Warning | SGF | Dallas, Polk | 49 min |
| May 28, 7:16 AM CDT | Severe Thunderstorm Warning | EAX | Bates, Henry | 29 min |
| May 28, 7:20 AM CDT | Severe Thunderstorm Warning | SGF | St. Clair | 40 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 00:00Z, 9.2 hours before the alert went out and 102 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
- 651 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 165 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 |
|---|---|---|---|---|
| May 28, 2:50 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Barton, Bourbon, Butler and 44 more | 85 min |
| May 28, 6:06 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chase, Coffey, Crawford and 6 more | 84 min |
| May 28, 6:34 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chautauqua, Coffey and 11 more | 116 min |
| May 28, 12:15 PM CDT | Mesoscale Discussion | SPC | Adair, Audrain, Boone, Caldwell, Carroll, Chariton and 22 more | 90 min |
| May 28, 5:39 PM CDT | Mesoscale Discussion | SPC | Lincoln, Saint Charles, Saint Louis, Warren, City of Saint Louis | 66 min |
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.