Alert archive / Montana / Mesoscale Discussions in 2011

Mesoscale Discussion 1626

July 15, 201119 counties in Montana; Sheridan County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2011, 2:39 PM MDT for 19 counties in Montana; Sheridan County, Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 15, 2011, 2:39 PM MDT (20:39 UTC)
Expired: Jul 15, 2011, 4:45 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Big Horn County, MT, Broadwater County, MT, Carbon County, MT, Custer County, MT, Gallatin County, MT, Golden Valley County, MT, Jefferson County, MT, Judith Basin County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Petroleum County, MT, Powder River County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Sheridan County, WY

The radar

The Billings radar (KBLX), 25 km from the middle of the area, began a volume at 20:42 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 648Jul 15, 3:25 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 14, 6:33 PM MDT	Mesoscale Discussion	SPC	Big Horn, Custer, Daniels, Dawson, Garfield, McCone and 11 more	57 min
Jul 14, 10:01 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Custer, Fallon, Powder River	6 hr
Jul 15, 1:54 AM MDT	Mesoscale Discussion	SPC	Carter, Dawson, Fallon, Powder River, Richland, Wibaux	2 hr
Jul 15, 3:26 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carbon, Custer, Golden Valley, Musselshell, Powder River and 4 more	6 hr
Jul 14, 8:05 PM MDT	Mesoscale Discussion	SPC	Laramie	55 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.