Alert archive / Kansas / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 603
The Storm Prediction Center issued this severe thunderstorm watch at Jul 5, 2011, 8:02 PM CDT for 34 counties in Kansas; Buchanan County, Platte County, Missouri. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 5, 2011, 8:02 PM CDT (01:02 UTC)
- Expired
- Jul 6, 2011, 3:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 70 kt
All 36 counties
Allen County, KS, Anderson County, KS, Atchison County, KS, Butler County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Ottawa County, KS, Riley County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Buchanan County, MO, Platte County, MO
The radar
The Topeka radar (KTWX), 30 km from the middle of the area, began a volume at 01:06 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
- 2%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 20%
- 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
- 95%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 9:59 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 38 min |
| Jul 5, 10:19 PM CDT | Severe Thunderstorm Warning | ICT | Marion | 38 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, 1.0 hours before the alert went out and 82 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
- 1259 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 1708 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:07 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Cheyenne, Clay, Cloud, Decatur and 26 more | 113 min |
| Jul 5, 8:23 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 2 hr |
| Jul 5, 10:41 PM CDT | Mesoscale Discussion | SPC | Chase, Cheyenne, Clay, Cloud, Coffey, Decatur and 33 more | 2 hr |
| Jul 6, 3:38 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Greeley, Sherman, Wallace | 67 min |
| Jul 6, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Gove, Greeley, Logan, Rawlins and 5 more | 8 hr |
| Jul 6, 6:16 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Sherman | 119 min |
| Jul 6, 1:38 PM CDT | Mesoscale Discussion | SPC | Barry, Benton, Bollinger, Butler, Camden, Carter and 44 more | 97 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.