Alert archive / Montana / Mesoscale Discussions in 2015

Mesoscale Discussion 1668

August 12, 20158 counties in Montana; 7 counties in North Dakota; Butte County, Harding County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2015, 3:46 PM MDT for 8 counties in Montana; 7 counties in North Dakota; Butte County, Harding County, South Dakota. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Aug 12, 2015, 3:46 PM MDT (21:46 UTC)
Expired
Aug 12, 2015, 4:45 PM MDT
In force
59 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Hettinger County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Harding County, SD

The radar

The Rapid City radar (KUDX), 238 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 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.

IssuedProductOfficeCountiesLasted
Aug 12, 12:52 PM MDTMesoscale DiscussionSPCCass, Grand Forks, Nelson, Pembina, Steele, Traill and 1 more113 min
Aug 12, 2:33 PM MDTSevere Thunderstorm WatchSPCGrand Forks, Pembina, Traill, Walsh9 hr
Aug 12, 4:41 PM MDTMesoscale DiscussionSPCGrand Forks, Pembina, Traill, Walsh2 hr

Nearby

Mesoscale Discussions in Montana, 2015Mesoscale Discussions in North Dakota, 2015Mesoscale Discussions in South Dakota, 2015Every mesoscale discussion in 2015

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.