Alert archive / Kansas / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 211
The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2008, 7:03 PM CDT for 35 counties in Kansas; 6 counties in Missouri; 7 counties in Oklahoma. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2008, 7:03 PM CDT (00:03 UTC)
- Expired
- Apr 22, 2008, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 48 counties
Allen County, KS, Anderson County, KS, Atchison County, KS, Brown County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Labette County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, Montgomery County, KS, Morris County, KS, Nemaha County, KS, Neosho County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Andrew County, MO, Buchanan County, MO, Clinton County, MO, DeKalb County, MO, Holt County, MO, Platte County, MO, Garfield County, OK, Grant County, OK, Kay County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Washington County, OK
The radar
The Topeka radar (KTWX), 53 km from the middle of the area, began a volume at 00:04 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
- 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
- 20%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 9:19 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 26 min |
| Apr 21, 9:46 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua, Cowley, Elk | 32 min |
| Apr 21, 10:03 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 27 min |
| Apr 21, 11:04 PM CDT | Severe Thunderstorm Warning | ICT | Chautauqua | 26 min |
| Apr 21, 11:40 PM CDT | Severe Thunderstorm Warning | TOP | Jefferson | 26 min |
| Apr 22, 12:21 AM CDT | Severe Thunderstorm Warning | EAX | Johnson, Leavenworth, Wyandotte | 39 min |
| Apr 22, 12:23 AM CDT | Severe Thunderstorm Warning | ICT | Labette | 18 min |
| Apr 22, 1:01 AM CDT | Severe Thunderstorm Warning | EAX | Clay, Jackson, Platte | 29 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, 0.1 hours before the alert went out and 69 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
- 1388 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1301 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 10:38 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Brown, Butler, Chase and 29 more | 2 hr |
| Apr 22, 1:14 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Cherokee, Crawford, Franklin and 6 more | 91 min |
| Apr 22, 7:42 AM CDT | Mesoscale Discussion | SPC | Barry, Carter, Christian, Douglas, Greene, Howell and 10 more | 63 min |
| Apr 22, 7:49 AM CDT | Severe Thunderstorm Watch | SPC | Barry, Christian, Dent, Douglas, Greene, Howell and 11 more | 6 hr |
| Apr 22, 9:41 AM CDT | Mesoscale Discussion | SPC | Cape Girardeau, Perry, Scott | 94 min |
| Apr 22, 10:12 AM CDT | Mesoscale Discussion | SPC | Barry, Christian, Douglas, Howell, McDonald, Oregon and 3 more | 93 min |
| Apr 22, 10:47 AM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 5 hr |
| Apr 22, 12:16 PM CDT | Mesoscale Discussion | SPC | Dunklin, Ozark, Pemiscot, Taney | 89 min |
| Apr 22, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Christian, Lawrence, McDonald, Newton, Stone and 1 more | 7 hr |
| Apr 22, 3:30 PM CDT | Mesoscale Discussion | SPC | Barry, Christian, Greene, Lawrence, McDonald, Newton and 2 more | 90 min |
| Apr 22, 6:51 PM CDT | Mesoscale Discussion | SPC | Barry, Christian, Greene, McDonald, Newton, Stone | 114 min |
| Apr 21, 7:34 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Creek, Garfield, Garvin, Kingfisher and 9 more | 86 min |
| Apr 21, 8:56 PM CDT | Tornado Watch | SPC | Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more | 5 hr |
| Apr 21, 10:29 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Coal, Creek, Garvin, Hughes and 11 more | 91 min |
| Apr 22, 2:33 PM CDT | Severe Thunderstorm Watch | SPC | McCurtain | 6 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2008Severe Thunderstorm Watches in Oklahoma, 2008Severe Thunderstorm Watches in Missouri, 2008Every severe thunderstorm watch in 2008
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.