Alert archive / Montana / Mesoscale Discussions in 2013

Mesoscale Discussion 1121

June 18, 201316 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2013, 1:55 PM MDT for 16 counties in Montana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 18, 2013, 1:55 PM MDT (19:55 UTC)
Expired: Jun 18, 2013, 4:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 60%

Counties Beaverhead County, MT, Broadwater County, MT, Cascade County, MT, Deer Lodge County, MT, Flathead County, MT, Glacier County, MT, Granite County, MT, Jefferson County, MT, Lake County, MT, Lewis and Clark County, MT, Missoula County, MT, Pondera County, MT, Powell County, MT, Silver Bow County, MT, Teton County, MT, Toole County, MT

The radar

The Missoula radar (KMSX), 75 km from the middle of the area, began a volume at 19:55 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 326Jun 18, 2:40 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
Jun 18, 2:37 PM MDT	Severe Thunderstorm Watch	SPC	Broadwater, Cascade, Chouteau, Deer Lodge, Flathead, Glacier and 14 more	7 hr
Jun 18, 5:20 PM MDT	Mesoscale Discussion	SPC	Broadwater, Cascade, Chouteau, Flathead, Glacier, Granite and 9 more	85 min

Nearby

Mesoscale Discussions in Montana, 2013 Every mesoscale discussion in 2013

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.