Alert archive / Nebraska / Severe Thunderstorm Watches in 2007

Severe Thunderstorm Watch 583

August 10, 200715 counties in Nebraska; 12 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Aug 10, 2007, 4:03 PM MDT for 15 counties in Nebraska; 12 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 10, 2007, 4:03 PM MDT (22:03 UTC)
Expired
Aug 10, 2007, 10:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 27 counties

Arthur County, NE, Blaine County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Haakon County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 159 km from the middle of the area, began a volume at 22:04 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
50%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 10, 4:54 PM MDTSevere Thunderstorm WarningLBFGarden51 min
Aug 10, 5:15 PM MDTSevere Thunderstorm WarningUNRMellette75 min
Aug 10, 5:38 PM MDTSevere Thunderstorm WarningUNRBennett, Todd48 min
Aug 10, 5:45 PM MDTSevere Thunderstorm WarningLBFGarden45 min
Aug 10, 6:31 PM MDTSevere Thunderstorm WarningLBFArthur, Garden, Grant59 min
Aug 10, 6:45 PM MDTSevere Thunderstorm WarningABRDewey, Stanley, Sully60 min
Aug 10, 6:46 PM MDTSevere Thunderstorm WarningUNRBennett44 min
Aug 10, 7:00 PM MDTSevere Thunderstorm WarningLBFCherry31 min
Aug 10, 7:21 PM MDTSevere Thunderstorm WarningUNRTodd39 min
Aug 10, 7:54 PM MDTSevere Thunderstorm WarningLBFHooker51 min
Aug 10, 8:30 PM MDTSevere Thunderstorm WarningLBFThomas45 min
Aug 10, 8:56 PM MDTSevere Thunderstorm WarningLBFCherry49 min
Aug 10, 8:57 PM MDTSevere Thunderstorm WarningLBFBlaine48 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, 10.1 hours before the alert went out and 161 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 2007-08-10Temperature 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 2007-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
4321 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
83 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
Aug 9, 7:18 PM MDTSevere Thunderstorm WatchSPCAntelope, Cedar, Knox, Madison, Pierce, Stanton and 1 more4 hr
Aug 9, 8:33 PM MDTMesoscale DiscussionSPCAntelope, Boone, Boyd, Burt, Butler, Cedar and 18 more87 min
Aug 9, 9:14 PM MDTSevere Thunderstorm WatchSPCAntelope, Boone, Burt, Butler, Cass, Cedar and 18 more6 hr
Aug 10, 12:45 AM MDTMesoscale DiscussionSPCAntelope, Boone, Boyd, Burt, Butler, Cass and 23 more60 min
Aug 10, 3:25 AM MDTMesoscale DiscussionSPCAntelope, Boyd, Cedar, Colfax, Cuming, Dixon and 8 more35 min
Aug 10, 9:45 AM MDTMesoscale DiscussionSPCBoyd, Brown, Cherry, Grant, Keya Paha, Rock90 min
Aug 10, 11:28 AM MDTSevere Thunderstorm WatchSPCAntelope, Cedar, Dakota, Dixon, Knox, Pierce and 2 more5 hr
Aug 10, 3:33 PM MDTMesoscale DiscussionSPCBlaine, Brown, Cherry, Hooker, Thomas57 min
Aug 10, 1:04 PM MDTMesoscale DiscussionSPCCampbell, Corson, Dewey, Edmunds, McPherson, Potter and 4 more116 min
Aug 10, 2:41 PM MDTSevere Thunderstorm WatchSPCBrown, Campbell, Corson, Dewey, Edmunds, Faulk and 4 more8 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2007Severe Thunderstorm Watches in South Dakota, 2007Every severe thunderstorm watch in 2007

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.