Alert archive / Nebraska / Tornado Watches in 2010

Tornado Watch 281

June 7, 20104 states

The Storm Prediction Center issued this tornado watch at Jun 7, 2010, 3:31 PM MDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2010, 3:31 PM MDT (21:31 UTC)
Expired
Jun 7, 2010, 11:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt

Counties Larimer County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Weld County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Fall River County, SD, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 131 km from the middle of the area, began a volume at 21:30 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
60%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
50%
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
50%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 7, 4:05 PM MDTSevere Thunderstorm WarningCYSAlbany, Converse, Goshen, Niobrara, Platte55 min
Jun 7, 4:08 PM MDTSevere Thunderstorm WarningBOULarimer, Weld12 min
Jun 7, 4:13 PM MDTSevere Thunderstorm WarningCYSNiobrara62 min
Jun 7, 4:57 PM MDTSevere Thunderstorm WarningCYSSioux63 min
Jun 7, 5:12 PM MDTSevere Thunderstorm WarningCYSSioux63 min
Jun 7, 5:27 PM MDTSevere Thunderstorm WarningCYSAlbany, Converse, Niobrara, Platte19 min
Jun 7, 5:57 PM MDTSevere Thunderstorm WarningCYSBox Butte, Sioux63 min
Jun 7, 6:05 PM MDTSevere Thunderstorm WarningCYSGoshen40 min
Jun 7, 6:12 PM MDTSevere Thunderstorm WarningCYSBox Butte, Dawes63 min
Jun 7, 6:22 PM MDTSevere Thunderstorm WarningCYSBanner, Kimball30 min
Jun 7, 6:40 PM MDTSevere Thunderstorm WarningCYSBox Butte, Dawes38 min
Jun 7, 6:43 PM MDTSevere Thunderstorm WarningCYSBox Butte, Morrill, Sioux62 min
Jun 7, 6:46 PM MDTSevere Thunderstorm WarningCYSGoshen39 min
Jun 7, 6:50 PM MDTSevere Thunderstorm WarningCYSAlbany, Converse, Platte33 min
Jun 7, 6:56 PM MDTSevere Thunderstorm WarningCYSBanner, Scotts Bluff, Sioux64 min
Jun 7, 7:02 PM MDTTornado WarningCYSBox Butte, Morrill, Scotts Bluff, Sioux28 min
Jun 7, 7:07 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill37 min
Jun 7, 7:14 PM MDTTornado WarningCYSBox Butte31 min
Jun 7, 7:20 PM MDTTornado WarningCYSScotts Bluff25 min
Jun 7, 7:43 PM MDTTornado WarningCYSBox Butte, Morrill, Scotts Bluff47 min
Jun 7, 8:01 PM MDTFlash Flood WarningCYSBox Butte4 hr
Jun 7, 8:24 PM MDTSevere Thunderstorm WarningCYSBanner, Cheyenne, Kimball, Morrill66 min
Jun 7, 8:35 PM MDTFlash Flood WarningCYSMorrill3 hr
Jun 7, 8:38 PM MDTSevere Thunderstorm WarningBOUWeld52 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

Rapid City, SD (KUNR), launched 12:00Z, 9.5 hours before the alert went out and 233 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, Rapid City, SD at 12:00Z on 2010-06-07Temperature 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, Rapid City, SD at 12:00Z on 2010-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 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
805 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
100 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 6, 6:05 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Las Animas, Otero, Prowers7 hr
Jun 6, 8:03 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Kit Carson, Lincoln, Logan, Morgan and 5 more87 min
Jun 6, 8:29 PM MDTMesoscale DiscussionSPCBaca, Bent, Las Animas, Otero, Prowers91 min
Jun 6, 8:53 PM MDTSevere Thunderstorm WatchSPCCheyenne, Kit Carson, Morgan, Washington, Yuma4 hr
Jun 6, 10:14 PM MDTMesoscale DiscussionSPCKit Carson, Yuma91 min
Jun 7, 1:34 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Broomfield, Denver, Elbert, Logan and 5 more86 min
Jun 7, 1:49 PM MDTMesoscale DiscussionSPCMoffat, Routt86 min
Jun 7, 2:20 PM MDTSevere Thunderstorm WatchSPCGarfield, Moffat, Rio Blanco7 hr
Jun 7, 2:39 PM MDTMesoscale DiscussionSPCLas Animas2 hr
Jun 7, 4:17 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 5 more88 min
Jun 7, 5:10 PM MDTMesoscale DiscussionSPCUinta2 hr

Nearby

Tornado Watches in Nebraska, 2010Tornado Watches in Colorado, 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.