Alert archive / Montana / Mesoscale Discussions in 2018

Mesoscale Discussion 533

May 26, 201810 counties in Montana; 9 counties in North Dakota; Harding County, Perkins County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 26, 2018, 4:46 PM MDT for 10 counties in Montana; 9 counties in North Dakota; Harding County, Perkins County, South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 26, 2018, 4:46 PM MDT (22:46 UTC)
Expired: May 26, 2018, 6:45 PM MDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 21 counties

Custer County, MT, Dawson County, MT, Fallon County, MT, Garfield County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Valley County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Harding County, SD, Perkins County, SD

The radar

The Glasgow radar (KGGW), 193 km from the middle of the area, began a volume at 22:48 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 122May 26, 5:35 PM MDT

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 2:21 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Big Horn, Broadwater, Carbon, Cascade, Custer and 33 more	114 min
May 26, 5:36 PM MDT	Severe Thunderstorm Watch	SPC	Dawson, Fallon, Garfield, McCone, Prairie, Richland and 3 more	9 hr

Nearby

Mesoscale Discussions in Montana, 2018 Mesoscale Discussions in North Dakota, 2018 Mesoscale Discussions in South Dakota, 2018 Every mesoscale discussion in 2018

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.