Alert archive / Wyoming / Mesoscale Discussions in 2017

Mesoscale Discussion 998

June 12, 20176 counties in Montana; 8 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2017, 2:17 PM MDT for 6 counties in Montana; 8 counties in Wyoming. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jun 12, 2017, 2:17 PM MDT (20:17 UTC)
Expired
Jun 12, 2017, 3:45 PM MDT
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
80%

Counties Big Horn County, MT, Carbon County, MT, Gallatin County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT, Big Horn County, WY, Fremont County, WY, Hot Springs County, WY, Johnson County, WY, Natrona County, WY, Park County, WY, Sheridan County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 146 km from the middle of the area, began a volume at 20:16 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.

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 11:23 AM MDTMesoscale DiscussionSPCBeaverhead, Carbon, Gallatin, Jefferson, Madison, Park and 3 more3 hr
Jun 12, 2:45 PM MDTSevere Thunderstorm WatchSPCBig Horn, Carbon, Golden Valley, Musselshell, Park, Powder River and 6 more7 hr
Jun 12, 11:29 AM MDTMesoscale DiscussionSPCConverse, Goshen, Laramie, Niobrara, Platte, Weston2 hr
Jun 12, 1:11 PM MDTTornado Watch PDSSPCAlbany, Converse, Goshen, Laramie, Niobrara, Platte8 hr
Jun 12, 5:05 PM MDTMesoscale DiscussionSPCConverse, Goshen, Laramie, Niobrara, Platte, Weston85 min
Jun 12, 5:35 PM MDTTornado WatchSPCCampbell, Crook, Weston8 hr

Nearby

Mesoscale Discussions in Wyoming, 2017Mesoscale Discussions in Montana, 2017Every mesoscale discussion in 2017

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.