Alert archive / Kansas / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 287

June 11, 201525 counties in Kansas; 9 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2015, 5:22 PM CDT for 25 counties in Kansas; 9 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2015, 5:22 PM CDT (22:22 UTC)
Expired: Jun 12, 2015, 12:00 AM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 34 counties

Anderson County, KS, Atchison County, KS, Brown County, KS, Chase County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Harper County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Kingman County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Reno County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Jackson County, MO, Platte County, MO, Ray County, MO

The radar

The Topeka radar (KTWX), 82 km from the middle of the area, began a volume at 22:20 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: 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: 30%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 5:48 PM CDT	Severe Thunderstorm Warning	ICT	Marion	27 min
Jun 11, 5:58 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Morris	47 min
Jun 11, 6:23 PM CDT	Severe Thunderstorm Warning	ICT	Reno	40 min
Jun 11, 6:50 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Shawnee	40 min
Jun 11, 6:51 PM CDT	Severe Thunderstorm Warning	TOP	Wabaunsee	39 min
Jun 11, 6:51 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, DeKalb, Gentry	39 min
Jun 11, 7:05 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Wabaunsee	25 min
Jun 11, 7:10 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Shawnee, Wabaunsee	35 min
Jun 11, 7:11 PM CDT	Flash Flood Warning	EAX	Doniphan	6 hr
Jun 11, 7:17 PM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, DeKalb	43 min
Jun 11, 7:21 PM CDT	Tornado Warning	TOP	Brown	8 min
Jun 11, 7:24 PM CDT	Severe Thunderstorm Warning	EAX	Atchison	36 min
Jun 11, 7:38 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Shawnee	30 min
Jun 11, 7:42 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Daviess, DeKalb, Grundy, Livingston	48 min
Jun 11, 8:25 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson	26 min
Jun 11, 8:34 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Doniphan	41 min
Jun 11, 8:49 PM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Clinton, DeKalb, Platte	41 min
Jun 11, 9:22 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Daviess, Grundy, Livingston	38 min
Jun 11, 9:25 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Clinton, Daviess, DeKalb	29 min
Jun 11, 9:52 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Carroll, Livingston	38 min
Jun 11, 10:08 PM CDT	Severe Thunderstorm Warning	ICT	Kingman, Sedgwick, Sumner	35 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 (KFOE), launched 12:00Z, 10.4 hours before the alert went out and 35 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 128 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 907 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 12:56 PM CDT	Mesoscale Discussion	SPC	Grant, Greeley, Hamilton, Haskell, Kearny, Morton and 4 more	94 min
Jun 11, 1:01 PM CDT	Mesoscale Discussion	SPC	Brown, Clay, Dickinson, Geary, Jackson, Marshall and 6 more	119 min
Jun 11, 4:47 PM CDT	Mesoscale Discussion	SPC	Atchison, Barber, Chase, Comanche, Doniphan, Douglas and 18 more	58 min
Jun 11, 4:51 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Haskell and 6 more	54 min
Jun 11, 5:03 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 13 more	9 hr
Jun 11, 1:53 PM CDT	Tornado Watch	SPC	Adair, Andrew, Atchison, Gentry, Grundy, Harrison and 7 more	7 hr
Jun 11, 5:48 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Daviess, DeKalb, Gentry, Grundy and 5 more	87 min

Nearby

Severe Thunderstorm Watches in Kansas, 2015 Severe Thunderstorm Watches in Missouri, 2015 Every severe thunderstorm watch in 2015

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.