Alert archive / Kansas / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 522

June 20, 201131 counties in Kansas; 14 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2011, 8:38 AM CDT for 31 counties in Kansas; 14 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 20, 2011, 8:38 AM CDT (13:38 UTC)
Expired
Jun 20, 2011, 3:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 45 counties

Decatur County, KS, Ellis County, KS, Finney County, KS, Gove County, KS, Graham County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Morton County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Scott County, KS, Seward County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Stanton County, KS, Stevens County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Adams County, NE, Buffalo County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Harlan County, NE, Hitchcock County, NE, Kearney County, NE, Phelps County, NE, Red Willow County, NE, Webster County, NE

The radar

The Goodland radar (KGLD), 117 km from the middle of the area, began a volume at 13:40 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
30%
Ten or more severe hail reports
70%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:49 AM CDTSevere Thunderstorm WarningDDCHamilton56 min
Jun 20, 8:49 AM CDTSevere Thunderstorm WarningDDCGrant, Hamilton, Kearny, Morton, Stanton, Stevens41 min
Jun 20, 9:29 AM CDTSevere Thunderstorm WarningDDCFinney, Grant, Hamilton, Haskell, Kearny, Stanton46 min
Jun 20, 9:35 AM CDTSevere Thunderstorm WarningDDCFinney, Hamilton, Kearny55 min
Jun 20, 9:46 AM CDTSevere Thunderstorm WarningGLDRawlins, Thomas59 min
Jun 20, 10:09 AM CDTSevere Thunderstorm WarningGLDWichita44 min
Jun 20, 10:14 AM CDTSevere Thunderstorm WarningDDCFinney, Gray, Kearny, Scott46 min
Jun 20, 10:44 AM CDTSevere Thunderstorm WarningGLDRawlins61 min
Jun 20, 11:21 AM CDTSevere Thunderstorm WarningGLDGove25 min
Jun 20, 12:47 PM CDTSevere Thunderstorm WarningGLDGove, Graham, Sheridan58 min
Jun 20, 12:56 PM CDTTornado WarningGLDGove, Graham, Sheridan52 min
Jun 20, 1:26 PM CDTTornado WarningGLDDecatur, Graham, Norton, Sheridan64 min
Jun 20, 1:35 PM CDTSevere Thunderstorm WarningGLDCheyenne, Rawlins30 min
Jun 20, 1:43 PM CDTFlash Flood WarningGLDLogan, Sherman, Thomas, Wallace6 hr
Jun 20, 2:03 PM CDTTornado WarningGLDGraham, Norton27 min
Jun 20, 2:09 PM CDTSevere Thunderstorm WarningGLDCheyenne, Rawlins51 min
Jun 20, 2:20 PM CDTTornado WarningGIDPhillips40 min
Jun 20, 2:26 PM CDTTornado WarningGLDNorton34 min
Jun 20, 2:57 PM CDTTornado WarningGIDPhillips33 min
Jun 20, 2:57 PM CDTTornado WarningGLDNorton18 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

Dodge City, (KDDC), launched 12:00Z, 1.6 hours before the alert went out and 120 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-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2011-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2011-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 255 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3175 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
255 m²/s²
0-3 km storm-relative helicity
238 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.

IssuedProductOfficeCountiesLasted
Jun 20, 8:05 AM CDTMesoscale DiscussionSPCCheyenne, Decatur, Finney, Gove, Graham, Grant and 15 more55 min
Jun 20, 10:42 AM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 18 more63 min
Jun 20, 12:22 PM CDTMesoscale DiscussionSPCDecatur, Gove, Graham, Logan, Norton, Phillips and 6 more83 min
Jun 20, 1:00 PM CDTTornado Watch PDSSPCDecatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more10 hr
Jun 20, 1:34 PM CDTMesoscale DiscussionSPCButler, Chase, Clay, Cowley, Dickinson, Ellsworth and 15 more116 min
Jun 20, 2:19 PM CDTMesoscale DiscussionSPCNorton, Phillips, Smith86 min
Jun 20, 2:52 PM CDTMesoscale DiscussionSPCDecatur, Rawlins, Thomas53 min
Jun 20, 3:08 PM CDTTornado WatchSPCAtchison, Brown, Butler, Chase, Chautauqua, Clay and 34 more7 hr
Jun 20, 3:59 PM CDTMesoscale DiscussionSPCJewell61 min
Jun 20, 6:17 PM CDTMesoscale DiscussionSPCBrown, Butler, Chase, Chautauqua, Clay, Coffey and 28 more58 min
Jun 19, 8:24 PM CDTMesoscale DiscussionSPCAdams, Blaine, Boone, Buffalo, Chase, Clay and 35 more96 min
Jun 19, 9:16 PM CDTMesoscale DiscussionSPCBurt, Cass, Dodge, Douglas, Lancaster, Nemaha and 4 more59 min
Jun 19, 9:49 PM CDTTornado WatchSPCAdams, Antelope, Boone, Buffalo, Burt, Butler and 46 more6 hr
Jun 20, 12:45 AM CDTSevere Thunderstorm WatchSPCChase, Dundy, Frontier, Hayes, Hitchcock, Red Willow2 hr
Jun 20, 3:27 AM CDTMesoscale DiscussionSPCBurt, Butler, Cass, Colfax, Cuming, Dodge and 11 more33 min
Jun 20, 3:46 AM CDTSevere Thunderstorm WatchSPCBurt, Butler, Cass, Colfax, Cuming, Dodge and 10 more5 hr
Jun 20, 6:53 PM CDTTornado WatchSPCAntelope, Boone, Boyd, Burt, Butler, Cass and 29 more6 hr

Nearby

Severe Thunderstorm Watches in Kansas, 2011Severe Thunderstorm Watches in Nebraska, 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.