Alert archive / Wyoming / Mesoscale Discussions in 2015

Mesoscale Discussion 1697

August 17, 2015Big Horn County, Carbon County, Powder River County, Montana; 10 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2015, 1:10 PM MDT for Big Horn County, Carbon County, Powder River County, Montana; 10 counties in Wyoming. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 17, 2015, 1:10 PM MDT (19:10 UTC)
Expired: Aug 17, 2015, 3:45 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Big Horn County, MT, Carbon County, MT, Powder River County, MT, Big Horn County, WY, Campbell County, WY, Converse County, WY, Crook County, WY, Hot Springs County, WY, Johnson County, WY, Park County, WY, Sheridan County, WY, Washakie County, WY, Weston County, WY

The radar

The Billings radar (KBLX), 186 km from the middle of the area, began a volume at 19:14 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 491Aug 17, 2:45 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
Aug 17, 2:47 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carbon, Carter, Custer, Powder River, Rosebud	7 hr
Aug 17, 1:59 PM MDT	Mesoscale Discussion	SPC	Laramie	2 hr

Nearby

Mesoscale Discussions in Wyoming, 2015 Mesoscale Discussions in Montana, 2015 Every 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.