Alert archive / South Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 532

April 21, 200738 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Apr 21, 2007, 7:56 PM CDT for 38 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 21, 2007, 7:56 PM CDT (00:56 UTC)
Expired: Apr 21, 2007, 10:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 38 counties

Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Mellette County, SD, Miner County, SD, Potter County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 124 km from the middle of the area, began a volume at 00:57 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.

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
Apr 21, 8:16 PM CDT	Mesoscale Discussion	SPC	Aurora, Beadle, Brown, Brule, Buffalo, Campbell and 32 more	119 min
Apr 21, 10:34 PM CDT	Severe Thunderstorm Watch	SPC	Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 15 more	3 hr
Apr 22, 1:56 PM CDT	Tornado Watch	SPC	Bon Homme, Clay, Union, Yankton	7 hr
Apr 22, 5:59 PM CDT	Mesoscale Discussion	SPC	Bon Homme, Clay, Lincoln, Turner, Yankton	2 hr

Nearby

Mesoscale Discussions in South Dakota, 2007 Every mesoscale discussion 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; radar from the NEXRAD Level II archive.