Alert archive / North Dakota / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 489
The Storm Prediction Center issued this severe thunderstorm watch at Aug 15, 2015, 6:13 PM CDT for 8 counties in Minnesota; 22 counties in North Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2015, 6:13 PM CDT (23:13 UTC)
- Expired
- Aug 15, 2015, 11:53 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 65 kt
All 30 counties
Clay County, MN, Kittson County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 67 km from the middle of the area, began a volume at 23:14 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 8:05 PM CDT | Severe Thunderstorm Warning | BIS | Stutsman | 25 min |
| Aug 15, 8:10 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 50 min |
| Aug 15, 8:56 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass | 64 min |
| Aug 15, 9:48 PM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Ransom, Richland | 57 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 15, 3:38 PM CDT | Mesoscale Discussion | SPC | Benson, Cavalier, Dickey, Eddy, Emmons, Foster and 11 more | 67 min |
Nearby
Severe Thunderstorm Watches in North Dakota, 2015Severe Thunderstorm Watches in Minnesota, 2015Every severe thunderstorm 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; radar from the NEXRAD Level II archive.