Alert archive / South Dakota / Mesoscale Discussions in 2004

Mesoscale Discussion 1744

July 20, 200410 counties in Nebraska; 20 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2004, 6:30 PM CDT for 10 counties in Nebraska; 20 counties in South Dakota. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jul 20, 2004, 6:30 PM CDT (23:30 UTC)
Expired: Jul 20, 2004, 8:00 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 30 counties

Antelope County, NE, Boyd County, NE, Cedar County, NE, Dixon County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Wayne County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 123 km from the middle of the area, began a volume at 23:32 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 660Jul 20, 9:00 PM CDT

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, 2:16 PM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Boyd, Burt, Cedar, Colfax and 17 more	119 min
Jul 20, 2:40 PM CDT	Tornado Watch	SPC	Antelope, Boyd, Cedar, Cuming, Dixon, Garfield and 9 more	6 hr
Jul 20, 3:28 PM CDT	Mesoscale Discussion	SPC	Campbell, Corson, Dewey, Harding, Perkins, Potter and 2 more	2 hr
Jul 20, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	Campbell, Corson, Dewey, Harding, McPherson, Perkins and 3 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2004 Mesoscale Discussions in Nebraska, 2004 Every mesoscale discussion in 2004

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.