Alert archive / South Dakota / Mesoscale Discussions in 2009

Mesoscale Discussion 1813

August 7, 20097 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2009, 4:06 PM MDT for 7 counties in South Dakota. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 7, 2009, 4:06 PM MDT (22:06 UTC)
Expired: Aug 7, 2009, 5:30 PM MDT
In force: 84 min
Issued by: the Storm Prediction Center

Counties Butte County, SD, Custer County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD

The radar

The Rapid City radar (KUDX), 61 km from the middle of the area, began a volume at 22:09 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 673Aug 7, 4:55 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
Aug 6, 7:34 PM MDT	Mesoscale Discussion	SPC	Bennett, Custer, Jackson, Meade, Oglala Lakota, Pennington	86 min
Aug 6, 8:15 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Jackson, Mellette, Todd, Tripp	6 hr
Aug 7, 11:50 AM MDT	Mesoscale Discussion	SPC	Butte, Harding	115 min
Aug 7, 2:55 PM MDT	Mesoscale Discussion	SPC	Clay, Lincoln, Union, Yankton	95 min
Aug 7, 4:56 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Custer, Fall River, Haakon, Harding and 6 more	6 hr

Nearby

Mesoscale Discussions in South Dakota, 2009 Every mesoscale discussion in 2009

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.