Alert archive / Montana / Mesoscale Discussions in 2008

Mesoscale Discussion 1808

July 18, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2008, 3:32 PM MDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2008, 3:32 PM MDT (21:32 UTC)
Expired: Jul 18, 2008, 5:00 PM MDT
In force: 88 min
Issued by: the Storm Prediction Center

All 23 counties

Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Golden Valley County, MT, Musselshell County, MT, Powder River County, MT, Rosebud County, MT, Stillwater County, MT, Treasure County, MT, Yellowstone County, MT, Bowman County, ND, Slope County, ND, Butte County, SD, Harding County, SD, Lawrence County, SD, Big Horn County, WY, Campbell County, WY, Crook County, WY, Johnson County, WY, Sheridan County, WY, Washakie County, WY

The radar

The Billings radar (KBLX), 185 km from the middle of the area, began a volume at 21:35 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 700Jul 18, 4:30 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 18, 12:04 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Carter, Custer, Golden Valley, Musselshell and 7 more	56 min
Jul 18, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 6 more	7 hr
Jul 18, 4:32 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Corson, Custer, Dewey, Fall River, Haakon and 9 more	10 hr

Nearby

Mesoscale Discussions in Montana, 2008 Mesoscale Discussions in Wyoming, 2008 Mesoscale Discussions in South Dakota, 2008 Every mesoscale discussion in 2008

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.