Alert archive / Montana / Mesoscale Discussions in 2011

Mesoscale Discussion 1489

July 3, 201120 counties in Montana; 4 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2011, 6:29 PM MDT for 20 counties in Montana; 4 counties in Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 3, 2011, 6:29 PM MDT (00:29 UTC)
Expired: Jul 3, 2011, 8:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 24 counties

Big Horn County, MT, Blaine County, MT, Carbon County, MT, Custer County, MT, Dawson County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Judith Basin County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Rosebud County, MT, Stillwater County, MT, Treasure County, MT, Valley County, MT, Yellowstone County, MT, Campbell County, WY, Crook County, WY, Johnson County, WY, Sheridan County, WY

The radar

The Billings radar (KBLX), 64 km from the middle of the area, began a volume at 00:29 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 592Jul 3, 8:40 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
Jul 3, 8:02 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 13 more	58 min
Jul 3, 8:41 PM MDT	Severe Thunderstorm Watch	SPC	Daniels, Richland, Roosevelt, Sheridan, Wibaux	3 hr
Jul 3, 10:30 PM MDT	Mesoscale Discussion	SPC	Carter, Custer, Daniels, Dawson, Fallon, McCone and 5 more	90 min

Nearby

Mesoscale Discussions in Montana, 2011 Mesoscale Discussions in Wyoming, 2011 Every mesoscale discussion in 2011

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.