Alert archive / North Dakota / Mesoscale Discussions in 2020

Mesoscale Discussion 1322

July 23, 20206 counties in Montana; 8 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2020, 1:59 PM MDT for 6 counties in Montana; 8 counties in North Dakota; 4 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 23, 2020, 1:59 PM MDT (19:59 UTC)
Expired: Jul 23, 2020, 4:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

Counties Carter County, MT, Dawson County, MT, Fallon 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, McKenzie County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Harding County, SD, Meade County, SD, Perkins County, SD

The radar

The Rapid City radar (KUDX), 230 km from the middle of the area, began a volume at 20:01 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 397Jul 23, 2:30 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
Jul 23, 11:39 AM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Deer Lodge, Gallatin, Granite, Jefferson and 6 more	2 hr
Jul 23, 2:27 PM MDT	Severe Thunderstorm Watch	SPC	Daniels, Dawson, Fallon, Prairie, Richland, Roosevelt and 2 more	6 hr
Jul 23, 2:43 PM MDT	Severe Thunderstorm Watch	SPC	Beaverhead, Broadwater, Cascade, Chouteau, Gallatin, Golden Valley and 9 more	4 hr
Jul 23, 4:54 PM MDT	Mesoscale Discussion	SPC	Richland, Roosevelt, Sheridan, Wibaux	2 hr
Jul 23, 5:24 PM MDT	Mesoscale Discussion	SPC	Carbon, Chouteau, Fergus, Golden Valley, Judith Basin, Musselshell and 3 more	2 hr

Nearby

Mesoscale Discussions in North Dakota, 2020 Mesoscale Discussions in Montana, 2020 Mesoscale Discussions in South Dakota, 2020 Every mesoscale discussion in 2020

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.