Alert archive / Montana / Mesoscale Discussions in 2014

Mesoscale Discussion 615

May 18, 20144 states

The Storm Prediction Center issued this mesoscale discussion at May 18, 2014, 12:37 PM MDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 18, 2014, 12:37 PM MDT (18:37 UTC)
Expired: May 18, 2014, 2:00 PM MDT
In force: 83 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 48 counties

Beaverhead County, MT, Big Horn County, MT, Broadwater County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Gallatin County, MT, Garfield County, MT, Golden Valley County, MT, Jefferson County, MT, Judith Basin County, MT, Madison County, MT, McCone County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Petroleum County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Rosebud County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Valley County, MT, Wheatland County, MT, Wibaux County, MT, Yellowstone County, MT, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Slope County, ND, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Big Horn County, WY, Campbell County, WY, Crook County, WY, Sheridan County, WY, Weston County, WY

The radar

The Billings radar (KBLX), 97 km from the middle of the area, began a volume at 18:43 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 158May 18, 2:15 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
May 18, 2:13 PM MDT	Severe Thunderstorm Watch	SPC	Big Horn, Carbon, Custer, Fergus, Garfield, Golden Valley and 13 more	7 hr
May 18, 4:57 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Carter, Custer, Daniels, Dawson and 21 more	63 min
May 18, 5:12 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Dawson, Fallon, Powder River, Richland, Roosevelt and 1 more	7 hr

Nearby

Mesoscale Discussions in Montana, 2014 Mesoscale Discussions in South Dakota, 2014 Mesoscale Discussions in Wyoming, 2014 Every mesoscale discussion in 2014

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.