Alert archive / Colorado / Mesoscale Discussions in 2010

Mesoscale Discussion 649

May 21, 20104 states

The Storm Prediction Center issued this mesoscale discussion at May 21, 2010, 1:30 PM MDT for 4 states. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: May 21, 2010, 1:30 PM MDT (19:30 UTC)
Expired: May 21, 2010, 2:30 PM MDT
In force: 60 min
Issued by: the Storm Prediction Center

All 33 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Larimer County, CO, Logan County, CO, Morgan County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Oglala Lakota County, SD, Pennington County, SD, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

The radar

The Cheyenne radar (KCYS), 114 km from the middle of the area, began a volume at 19:30 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.

The watches that followed

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

Tornado Watch 200May 21, 2:25 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
May 21, 2:26 PM MDT	Tornado Watch	SPC	Larimer, Logan, Morgan, Weld	8 hr
May 21, 5:12 PM MDT	Mesoscale Discussion	SPC	Larimer, Weld	2 hr

Nearby

Mesoscale Discussions in Colorado, 2010 Mesoscale Discussions in Nebraska, 2010 Mesoscale Discussions in Wyoming, 2010 Every mesoscale discussion 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; radar from the NEXRAD Level II archive.