Alert archive / North Dakota / Tornado Watches in 2015
Tornado Watch 380
The Storm Prediction Center issued this tornado watch at Jun 30, 2015, 4:29 PM MDT for 10 counties in Montana; 16 counties in North Dakota; 10 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 30, 2015, 4:29 PM MDT (22:29 UTC)
- Expired
- Jun 30, 2015, 11:47 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 36 counties
Daniels County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McKenzie County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Butte County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD
The radar
The Glasgow radar (KGGW), 208 km from the middle of the area, began a volume at 22:31 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 4:44 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 61 min |
| Jun 30, 4:52 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 23 min |
| Jun 30, 4:58 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Valley | 41 min |
| Jun 30, 5:02 PM MDT | Flash Flood Warning | GGW | Richland | 3 hr |
| Jun 30, 5:18 PM MDT | Severe Thunderstorm Warning | BIS | Golden Valley, Slope | 57 min |
| Jun 30, 5:25 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley, McKenzie | 65 min |
| Jun 30, 6:00 PM MDT | Severe Thunderstorm Warning | GGW | Wibaux | 42 min |
| Jun 30, 6:11 PM MDT | Severe Thunderstorm Warning | BIS | Bowman, Slope | 64 min |
| Jun 30, 6:19 PM MDT | Severe Thunderstorm Warning | GGW | McCone, Richland, Roosevelt | 56 min |
| Jun 30, 6:30 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley | 47 min |
| Jun 30, 6:42 PM MDT | Tornado Warning | BIS | Bowman | 33 min |
| Jun 30, 6:59 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Bowman | 61 min |
| Jun 30, 7:08 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Dunn, McKenzie | 56 min |
| Jun 30, 7:11 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland | 46 min |
| Jun 30, 7:16 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 59 min |
| Jun 30, 7:22 PM MDT | Severe Thunderstorm Warning | BIS | Bowman, Slope | 41 min |
| Jun 30, 7:26 PM MDT | Tornado Warning | UNR | Harding | 49 min |
| Jun 30, 7:27 PM MDT | Tornado Warning | BIS | Bowman | 14 min |
| Jun 30, 8:13 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding, Perkins | 62 min |
| Jun 30, 8:56 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Perkins | 64 min |
| Jun 30, 9:35 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson, Meade, Pennington, Perkins, Ziebach | 85 min |
| Jun 30, 9:37 PM MDT | Severe Thunderstorm Warning | BIS | Grant | 38 min |
| Jun 30, 10:17 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Sioux | 58 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.5 hours before the alert went out and 208 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
- 2626 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 429 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 2:49 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, McCone, Prairie and 3 more | 86 min |
Nearby
Tornado Watches in North Dakota, 2015Tornado Watches in Montana, 2015Tornado Watches in South Dakota, 2015Every tornado watch in 2015
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.