Alert archive / North Dakota / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 478
The Storm Prediction Center issued this severe thunderstorm watch at Aug 30, 2014, 6:27 PM MDT for 12 counties in North Dakota; 11 counties in South Dakota. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2014, 6:27 PM MDT (00:27 UTC)
- Expired
- Aug 30, 2014, 10:44 PM MDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 23 counties
Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Grant County, ND, Hettinger County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Stanley County, SD, Ziebach County, SD
The radar
The Bismarck radar (KBIS), 180 km from the middle of the area, began a volume at 00:29 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
- 5%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 6:42 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 63 min |
| Aug 30, 7:12 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Dunn, McKenzie | 25 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:00 PM MDT | Mesoscale Discussion | SPC | Burleigh, Emmons, Kidder, Logan, McIntosh, McLean and 6 more | 90 min |
| Aug 31, 1:20 PM MDT | Mesoscale Discussion | SPC | Clay, Lincoln, Minnehaha, Union | 85 min |
| Aug 31, 2:31 PM MDT | Tornado Watch | SPC | Union | 5 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2014Severe Thunderstorm Watches in South Dakota, 2014Every severe thunderstorm watch 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.