Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 1447

June 24, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2005, 4:15 PM MDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2005, 4:15 PM MDT (22:15 UTC)
Expired: Jun 24, 2005, 5:45 PM MDT
In force: 90 min
Issued by: the Storm Prediction Center

All 38 counties

Big Horn County, MT, Powder River County, MT, Arthur County, NE, Banner County, NE, Box Butte 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, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Lawrence County, SD, Oglala Lakota County, SD, Albany County, WY, Big Horn County, WY, Campbell County, WY, Carbon County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Washakie County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 177 km from the middle of the area, began a volume at 22:18 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 520Jun 24, 5:10 PM MDT

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.3 hours before the alert went out and 203 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1357 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 1:05 PM MDT	Mesoscale Discussion	SPC	Big Horn	85 min
Jun 24, 1:35 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Powder River	7 hr
Jun 24, 5:10 PM MDT	Severe Thunderstorm Watch	SPC	Carter	6 hr
Jun 23, 6:52 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Brown, Chase, Cherry, Custer and 21 more	83 min
Jun 23, 10:42 PM MDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Boyd, Brown and 35 more	63 min
Jun 24, 3:02 PM MDT	Mesoscale Discussion	SPC	Dundy, Furnas, Hitchcock, Red Willow	88 min

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Wyoming, 2005 Mesoscale Discussions in South Dakota, 2005 Every mesoscale discussion in 2005

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.