Alert archive / North Dakota / Mesoscale Discussions in 2018
Mesoscale Discussion 591
The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 1:47 PM MDT for 4 counties in Montana; 16 counties in North Dakota; Butte County, Harding County, Perkins County, South Dakota. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- May 31, 2018, 1:47 PM MDT (19:47 UTC)
- Expired
- May 31, 2018, 3:45 PM MDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 23 counties
Carter County, MT, Dawson County, MT, Fallon County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Butte County, SD, Harding County, SD, Perkins County, SD
The radar
The Bismarck radar (KBIS), 154 km from the middle of the area, began a volume at 19:50 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.8 hours before the alert went out and 159 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
- 1005 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 38 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 31, 12:33 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Broadwater, Deer Lodge, Gallatin, Granite, Jefferson and 5 more | 117 min |
| May 31, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | Beaverhead, Big Horn, Broadwater, Carbon, Carter, Cascade and 25 more | 8 hr |
| May 31, 5:27 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Custer, Gallatin, Golden Valley, Madison and 10 more | 93 min |
| May 31, 2:17 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Burleigh, Dunn, Golden Valley and 15 more | 7 hr |
| May 31, 3:55 PM MDT | Mesoscale Discussion | SPC | Butte, Custer, Harding, Lawrence, Meade, Pennington and 1 more | 2 hr |
Nearby
Mesoscale Discussions in North Dakota, 2018Mesoscale Discussions in Montana, 2018Mesoscale Discussions in South Dakota, 2018Every mesoscale discussion in 2018
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.