Alert archive / Nebraska / Tornado Watches in 2010

Tornado Watch 385

June 22, 201018 counties in Nebraska; 12 counties in South Dakota; Goshen County, Laramie County, Wyoming

The Storm Prediction Center issued this tornado watch at Jun 22, 2010, 4:03 PM MDT for 18 counties in Nebraska; 12 counties in South Dakota; Goshen County, Laramie County, Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 22, 2010, 4:03 PM MDT (22:03 UTC)
Expired
Jun 22, 2010, 11:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 32 counties

Arthur County, NE, Banner County, NE, Box Butte County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, McPherson County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD, Goshen County, WY, Laramie County, WY

The radar

The Rapid City radar (KUDX), 131 km from the middle of the area, began a volume at 22:03 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
40%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
70%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 22, 4:12 PM MDTSevere Thunderstorm WarningCYSLaramie48 min
Jun 22, 4:31 PM MDTSevere Thunderstorm WarningCYSBanner44 min
Jun 22, 4:58 PM MDTTornado WarningCYSBanner47 min
Jun 22, 5:24 PM MDTSevere Thunderstorm WarningUNRBennett, Todd66 min
Jun 22, 5:32 PM MDTTornado WarningCYSBanner, Cheyenne, Morrill43 min
Jun 22, 5:36 PM MDTSevere Thunderstorm WarningLBFSheridan39 min
Jun 22, 5:54 PM MDTSevere Thunderstorm WarningUNRBennett66 min
Jun 22, 6:07 PM MDTTornado WarningUNRTodd38 min
Jun 22, 6:14 PM MDTSevere Thunderstorm WarningLBFSheridan46 min
Jun 22, 6:27 PM MDTTornado WarningLBFCherry, Sheridan33 min
Jun 22, 6:27 PM MDTSevere Thunderstorm WarningUNRBennett, Todd63 min
Jun 22, 6:33 PM MDTSevere Thunderstorm WarningUNRMellette57 min
Jun 22, 6:36 PM MDTSevere Thunderstorm WarningUNRButte, Custer, Lawrence, Meade, Pennington84 min
Jun 22, 6:40 PM MDTSevere Thunderstorm WarningUNRTodd65 min
Jun 22, 6:41 PM MDTSevere Thunderstorm WarningLBFCherry49 min
Jun 22, 7:19 PM MDTSevere Thunderstorm WarningCYSSioux35 min
Jun 22, 7:19 PM MDTSevere Thunderstorm WarningUNRButte, Harding, Meade, Perkins56 min
Jun 22, 7:27 PM MDTSevere Thunderstorm WarningLBFCherry48 min
Jun 22, 7:29 PM MDTSevere Thunderstorm WarningUNRMellette, Todd61 min
Jun 22, 7:45 PM MDTSevere Thunderstorm WarningLBFCherry45 min
Jun 22, 7:49 PM MDTSevere Thunderstorm WarningUNRBennett, Custer, Fall River, Jackson, Pennington86 min
Jun 22, 7:57 PM MDTSevere Thunderstorm WarningUNRButte, Custer, Meade, Pennington93 min
Jun 22, 8:09 PM MDTSevere Thunderstorm WarningUNRMeade, Perkins66 min
Jun 22, 8:20 PM MDTSevere Thunderstorm WarningUNRMeade55 min
Jun 22, 8:46 PM MDTSevere Thunderstorm WarningUNRBennett, Haakon, Jackson, Meade, Pennington, Perkins and 1 more59 min
Jun 22, 10:46 PM MDTSevere Thunderstorm WarningLBFKeith, Perkins44 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

Denver, CO (KDNR), launched 12:00Z, 10.1 hours before the alert went out and 343 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, Denver, CO at 12:00Z on 2010-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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, Denver, CO at 12:00Z on 2010-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939587897Sfc1 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
2264 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
142 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 21, 6:42 PM MDTMesoscale DiscussionSPCBanner, Box Butte, Dawes, Scotts Bluff, Sioux93 min
Jun 21, 9:32 PM MDTSevere Thunderstorm WatchSPCAdams, Buffalo, Chase, Clay, Custer, Dawson and 28 more6 hr
Jun 21, 10:15 PM MDTMesoscale DiscussionSPCCass, Douglas, Gage, Jefferson, Johnson, Lancaster and 8 more90 min
Jun 22, 12:01 AM MDTSevere Thunderstorm WatchSPCAdams, Antelope, Boone, Burt, Butler, Cass and 36 more6 hr
Jun 22, 2:36 PM MDTSevere Thunderstorm WatchSPCDundy, Hitchcock, Red Willow7 hr
Jun 22, 2:37 PM MDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Burt, Butler and 39 more23 min
Jun 22, 3:07 PM MDTMesoscale DiscussionSPCArthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 9 more83 min
Jun 22, 5:17 PM MDTMesoscale DiscussionSPCAdams, Franklin, Frontier, Furnas, Gosper, Harlan and 6 more88 min
Jun 22, 5:30 PM MDTTornado WatchSPCAdams, Antelope, Blaine, Boone, Boyd, Brown and 58 more6 hr
Jun 21, 8:54 PM MDTSevere Thunderstorm WatchSPCBrown, Butte, Campbell, Corson, Custer, Dewey and 13 more7 hr
Jun 22, 12:42 AM MDTMesoscale DiscussionSPCBrown, Campbell, Edmunds, Faulk, McPherson, Potter and 1 more63 min
Jun 22, 1:13 AM MDTSevere Thunderstorm WatchSPCBrown, Campbell, Clark, Codington, Day, Deuel and 13 more5 hr
Jun 22, 12:57 PM MDTMesoscale DiscussionSPCLawrence63 min
Jun 22, 1:18 PM MDTSevere Thunderstorm WatchSPCButte, Custer, Fall River, Harding, Lawrence, Meade and 2 more7 hr
Jun 22, 4:52 PM MDTMesoscale DiscussionSPCCuster, Fall River, Lawrence83 min

Nearby

Tornado Watches in Nebraska, 2010Tornado Watches in South Dakota, 2010Tornado Watches in Wyoming, 2010Every tornado watch in 2010

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.