Alert archive / Wyoming / Mesoscale Discussions in 2017
Mesoscale Discussion 719
The Storm Prediction Center issued this mesoscale discussion at May 15, 2017, 3:07 PM MDT for 4 states. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2017, 3:07 PM MDT (21:07 UTC)
- Expired
- May 15, 2017, 5:00 PM MDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 22 counties
Carter County, MT, Custer County, MT, Powder River County, MT, Prairie County, MT, Box Butte County, NE, Dawes County, NE, Scotts Bluff County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Lawrence County, SD, Oglala Lakota County, SD, Pennington County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 163 km from the middle of the area, began a volume at 21:11 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 nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.1 hours before the alert went out and 301 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1899 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- -80 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 4:40 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Fallon, Powder River | 7 hr |
| May 15, 2:44 PM MDT | Severe Thunderstorm Watch | SPC | Dundy, Hitchcock, Red Willow | 7 hr |
| May 15, 4:58 PM MDT | Mesoscale Discussion | SPC | Adams, Boone, Buffalo, Clay, Custer, Dawson and 23 more | 2 hr |
| May 15, 5:53 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Clay, Custer, Dawson, Fillmore and 20 more | 6 hr |
| May 15, 8:15 AM MDT | Mesoscale Discussion | SPC | Hutchinson, Lincoln, McCook, Minnehaha, Turner | 90 min |
Nearby
Mesoscale Discussions in Wyoming, 2017Mesoscale Discussions in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.