Alert archive / Montana / Mesoscale Discussions in 2011

Mesoscale Discussion 1598

July 12, 2011Clark County, Lemhi County, Idaho; 28 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2011, 5:30 PM MDT for Clark County, Lemhi County, Idaho; 28 counties in Montana. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued: Jul 12, 2011, 5:30 PM MDT (23:30 UTC)
Expired: Jul 12, 2011, 6:30 PM MDT
In force: 60 min
Issued by: the Storm Prediction Center

All 30 counties

Clark County, ID, Lemhi County, ID, Beaverhead County, MT, Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Deer Lodge County, MT, Fergus County, MT, Gallatin County, MT, Golden Valley County, MT, Granite County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Madison County, MT, Meagher County, MT, Missoula County, MT, Park County, MT, Pondera County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Teton County, MT, Toole County, MT, Wheatland County, MT

The radar

The Great Falls radar (KTFX), 157 km from the middle of the area, began a volume at 23:33 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 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 12, 1:38 PM MDT	Severe Thunderstorm Watch	SPC	Lemhi	7 hr
Jul 12, 12:56 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Cascade, Deer Lodge, Flathead, Gallatin and 16 more	64 min

Nearby

Mesoscale Discussions in Montana, 2011 Mesoscale Discussions in Idaho, 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.