Alert archive / Nebraska / Mesoscale Discussions in 2008

Mesoscale Discussion 1829

July 20, 200817 counties in Nebraska; 7 counties in South Dakota; 7 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2008, 3:45 PM MDT for 17 counties in Nebraska; 7 counties in South Dakota; 7 counties in Wyoming. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 20, 2008, 3:45 PM MDT (21:45 UTC)
Expired: Jul 20, 2008, 6:15 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 31 counties

Arthur County, NE, Banner County, NE, Blaine County, NE, Box Butte County, NE, Cherry County, NE, Cheyenne County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Thomas County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Lawrence County, SD, Oglala Lakota County, SD, Pennington County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 157 km from the middle of the area, began a volume at 21:45 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 711Jul 20, 4:20 PM MDT

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
Jul 20, 9:04 AM MDT	Mesoscale Discussion	SPC	Burt, Butler, Cass, Cedar, Colfax, Cuming and 16 more	86 min
Jul 20, 4:22 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Box Butte, Brown, Cherry, Dawes and 13 more	7 hr
Jul 19, 7:17 PM MDT	Mesoscale Discussion	SPC	Campbell	58 min
Jul 20, 12:52 AM MDT	Mesoscale Discussion	SPC	Marshall	83 min

Nearby

Mesoscale Discussions in Nebraska, 2008 Mesoscale Discussions in South Dakota, 2008 Mesoscale Discussions in Wyoming, 2008 Every mesoscale discussion in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.