Alert archive / Kansas / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 508

September 10, 201532 counties in Kansas; 30 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Sep 10, 2015, 2:59 PM CDT for 32 counties in Kansas; 30 counties in Nebraska. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Sep 10, 2015, 2:59 PM CDT (19:59 UTC)
Expired: Sep 10, 2015, 8:10 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 62 counties

Barton County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Decatur County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Graham County, KS, Jewell County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Norton County, KS, Osborne County, KS, Ottawa County, KS, Phillips County, KS, Pottawatomie County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Rooks County, KS, Russell County, KS, Saline County, KS, Sheridan County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Adams County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lincoln County, NE, Merrick County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Saline County, NE, Sherman County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 49 km from the middle of the area, began a volume at 19:59 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: 2%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 80%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Sep 10, 4:08 PM CDT	Severe Thunderstorm Warning	GID	Phillips	22 min
Sep 10, 4:08 PM CDT	Severe Thunderstorm Warning	GLD	Norton	37 min
Sep 10, 4:18 PM CDT	Severe Thunderstorm Warning	GID	Nuckolls	42 min
Sep 10, 4:29 PM CDT	Severe Thunderstorm Warning	GID	Phillips, Rooks	46 min
Sep 10, 4:33 PM CDT	Severe Thunderstorm Warning	GID	Dawson	42 min
Sep 10, 4:38 PM CDT	Severe Thunderstorm Warning	GID	Buffalo	35 min
Sep 10, 5:04 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, Thayer	41 min
Sep 10, 5:14 PM CDT	Severe Thunderstorm Warning	GID	Osborne, Phillips, Rooks	46 min
Sep 10, 5:21 PM CDT	Severe Thunderstorm Warning	GID	Furnas	39 min
Sep 10, 5:24 PM CDT	Severe Thunderstorm Warning	GID	Thayer	51 min
Sep 10, 5:31 PM CDT	Severe Thunderstorm Warning	GID	Osborne, Rooks	44 min
Sep 10, 5:35 PM CDT	Severe Thunderstorm Warning	TOP	Republic	40 min
Sep 10, 5:52 PM CDT	Severe Thunderstorm Warning	GLD	Norton	53 min
Sep 10, 5:54 PM CDT	Severe Thunderstorm Warning	TOP	Washington	51 min
Sep 10, 5:58 PM CDT	Severe Thunderstorm Warning	GID	Webster	47 min
Sep 10, 6:00 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	45 min
Sep 10, 6:02 PM CDT	Severe Thunderstorm Warning	GLD	Decatur, Norton	43 min
Sep 10, 6:03 PM CDT	Severe Thunderstorm Warning	GID	Phillips, Smith	42 min
Sep 10, 6:08 PM CDT	Severe Thunderstorm Warning	ICT	Russell	52 min
Sep 10, 6:10 PM CDT	Severe Thunderstorm Warning	GID	Phillips	50 min
Sep 10, 6:14 PM CDT	Severe Thunderstorm Warning	TOP	Republic, Washington	46 min
Sep 10, 6:15 PM CDT	Severe Thunderstorm Warning	GID	Osborne	30 min
Sep 10, 6:16 PM CDT	Severe Thunderstorm Warning	GID	Nuckolls, Thayer	44 min
Sep 10, 6:27 PM CDT	Severe Thunderstorm Warning	GID	Jewell, Smith	48 min
Sep 10, 6:28 PM CDT	Severe Thunderstorm Warning	GID	Phillips, Rooks	47 min
Sep 10, 6:36 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Marshall, Riley, Washington	39 min
Sep 10, 6:39 PM CDT	Severe Thunderstorm Warning	GLD	Graham, Norton	35 min
Sep 10, 6:42 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Cloud, Ottawa	48 min
Sep 10, 6:43 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	32 min
Sep 10, 6:44 PM CDT	Severe Thunderstorm Warning	TOP	Washington	31 min
Sep 10, 6:48 PM CDT	Severe Thunderstorm Warning	GID	Phillips, Rooks	27 min
Sep 10, 6:49 PM CDT	Severe Thunderstorm Warning	TOP	Republic	26 min
Sep 10, 6:51 PM CDT	Severe Thunderstorm Warning	GID	Jewell	39 min
Sep 10, 6:56 PM CDT	Severe Thunderstorm Warning	ICT	Barton, Russell	49 min
Sep 10, 6:57 PM CDT	Severe Thunderstorm Warning	GID	Thayer	15 min
Sep 10, 7:00 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	30 min
Sep 10, 7:03 PM CDT	Severe Thunderstorm Warning	GID	Rooks	24 min
Sep 10, 7:06 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	24 min
Sep 10, 7:12 PM CDT	Severe Thunderstorm Warning	TOP	Cloud, Republic	48 min
Sep 10, 7:12 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Wabaunsee	48 min
Sep 10, 7:17 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary	43 min
Sep 10, 7:27 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	48 min
Sep 10, 7:31 PM CDT	Severe Thunderstorm Warning	ICT	Barton, Ellsworth, Rice	59 min
Sep 10, 7:33 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Wabaunsee	42 min
Sep 10, 7:42 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Cloud, Dickinson, Ottawa	48 min
Sep 10, 7:48 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Pottawatomie, Riley, Wabaunsee	42 min
Sep 10, 7:52 PM CDT	Severe Thunderstorm Warning	TOP	Shawnee, Wabaunsee	38 min
Sep 10, 7:56 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Riley, Wabaunsee	49 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.0 hours before the alert went out and 160 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: 492 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: -2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 10, 12:56 AM CDT	Mesoscale Discussion	SPC	Marshall, Republic, Washington	2 hr
Sep 10, 1:23 PM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 20 more	97 min
Sep 10, 3:58 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Crawford, Douglas and 7 more	3 hr
Sep 10, 5:06 PM CDT	Mesoscale Discussion	SPC	Grant, Haskell, Meade, Morton, Seward, Stanton and 1 more	2 hr
Sep 10, 5:27 PM CDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Decatur, Dickinson and 35 more	93 min
Sep 10, 5:44 PM CDT	Severe Thunderstorm Watch	SPC	Edwards, Ellis, Finney, Ford, Grant, Gray and 17 more	4 hr

Nearby

Severe Thunderstorm Watches in Kansas, 2015 Severe Thunderstorm Watches in Nebraska, 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.