Alert archive / North Dakota / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 463
The Storm Prediction Center issued this severe thunderstorm watch at Aug 17, 2014, 2:52 PM MDT for 27 counties in North Dakota; Campbell County, Corson County, Walworth County, South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2014, 2:52 PM MDT (20:52 UTC)
- Expired
- Aug 17, 2014, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 30 counties
Adams County, ND, Benson County, ND, Bottineau County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Campbell County, SD, Corson County, SD, Walworth County, SD
The radar
The Bismarck radar (KBIS), 13 km from the middle of the area, began a volume at 20:55 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
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 50%
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 17, 4:45 PM MDT | Severe Thunderstorm Warning | BIS | Pierce, Rolette | 21 min |
| Aug 17, 6:07 PM MDT | Severe Thunderstorm Warning | FGF | Benson | 23 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.9 hours before the alert went out and 13 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
- 154 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 634 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 1:20 PM MDT | Mesoscale Discussion | SPC | Adams, Bottineau, Bowman, Dunn, Grant, Hettinger and 9 more | 85 min |
| Aug 17, 5:39 PM MDT | Mesoscale Discussion | SPC | Benson, Burleigh, Cavalier, Eddy, Emmons, Foster and 11 more | 66 min |
| Aug 17, 12:56 PM MDT | Mesoscale Discussion | SPC | Bennett, Custer, Jackson, Meade, Mellette, Oglala Lakota and 2 more | 64 min |
| Aug 17, 1:21 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Butte, Custer, Haakon, Harding, Jackson and 8 more | 8 hr |
| Aug 17, 4:09 PM MDT | Mesoscale Discussion | SPC | Bennett, Butte, Haakon, Jackson, Jones, Meade and 7 more | 96 min |
| Aug 17, 5:43 PM MDT | Mesoscale Discussion | SPC | Bennett, Meade, Oglala Lakota, Pennington | 62 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.