Alert archive / Montana / Mesoscale Discussions in 2009

Mesoscale Discussion 1806

August 6, 20099 counties in Idaho; 20 counties in Montana; Park County, Teton County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2009, 6:28 PM MDT for 9 counties in Idaho; 20 counties in Montana; Park County, Teton County, Wyoming. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 6, 2009, 6:28 PM MDT (00:28 UTC)
Expired: Aug 6, 2009, 8:00 PM MDT
In force: 92 min
Issued by: the Storm Prediction Center

All 31 counties

Bannock County, ID, Bingham County, ID, Bonneville County, ID, Caribou County, ID, Clark County, ID, Fremont County, ID, Jefferson County, ID, Madison County, ID, Teton County, ID, Big Horn County, MT, Broadwater County, MT, Carbon County, MT, Fergus County, MT, Gallatin County, MT, Garfield County, MT, Golden Valley County, MT, Judith Basin County, MT, Madison County, MT, McCone County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Petroleum County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Park County, WY, Teton County, WY

The radar

The Billings radar (KBLX), 64 km from the middle of the area, began a volume at 00:31 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 670Aug 6, 7:35 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 6, 7:39 PM MDT	Severe Thunderstorm Watch	SPC	Garfield, McCone, Petroleum, Phillips, Valley	5 hr
Aug 6, 9:55 PM MDT	Mesoscale Discussion	SPC	Garfield, Petroleum, Phillips, Valley	65 min
Aug 7, 11:50 AM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Carter, Custer, Fallon, Gallatin and 10 more	115 min
Aug 7, 2:38 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	7 hr
Aug 7, 5:55 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Carter, Custer, Powder River, Rosebud and 2 more	95 min
Aug 7, 5:37 PM MDT	Mesoscale Discussion	SPC	Goshen, Laramie, Platte	113 min

Nearby

Mesoscale Discussions in Montana, 2009 Mesoscale Discussions in Idaho, 2009 Mesoscale Discussions in Wyoming, 2009 Every mesoscale discussion in 2009

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.