Alert archive / North Dakota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 450
The Storm Prediction Center issued this severe thunderstorm watch at Jun 25, 2007, 4:48 PM MDT for 4 counties in Montana; 9 counties in North Dakota; 6 counties in South Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 25, 2007, 4:48 PM MDT (22:48 UTC)
- Expired
- Jun 26, 2007, 1:00 AM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
Counties Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, Mercer County, ND, Slope County, ND, Stark County, ND, Butte County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD
The radar
The Rapid City radar (KUDX), 224 km from the middle of the area, began a volume at 22:50 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- 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
- 60%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 5:10 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 65 min |
| Jun 25, 5:47 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 44 min |
| Jun 25, 7:16 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 59 min |
| Jun 25, 10:30 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Lawrence | 60 min |
| Jun 25, 10:58 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 62 min |
| Jun 25, 11:16 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley | 59 min |
| Jun 26, 12:01 AM MDT | Severe Thunderstorm Warning | UNR | Meade | 46 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, 10.8 hours before the alert went out and 317 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
- 1254 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 100 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 24, 6:48 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Carter, Custer, Dawson, Fallon and 14 more | 87 min |
| Jun 24, 9:47 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Dawson, Fallon, Fergus, Garfield and 8 more | 58 min |
| Jun 24, 10:36 PM MDT | Severe Thunderstorm Watch | SPC | Custer, Dawson, Fallon, Garfield, McCone, Petroleum and 7 more | 7 hr |
| Jun 25, 9:12 AM MDT | Mesoscale Discussion | SPC | Daniels, Phillips, Sheridan, Valley | 93 min |
| Jun 24, 6:11 PM MDT | Mesoscale Discussion | SPC | Adams | 2 hr |
| Jun 24, 6:30 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Golden Valley, Grant, Hettinger and 3 more | 4 hr |
| Jun 24, 7:11 PM MDT | Mesoscale Discussion | SPC | Benson, Burleigh, Cavalier, Eddy, McHenry, McLean and 10 more | 64 min |
| Jun 24, 8:30 PM MDT | Mesoscale Discussion | SPC | Adams, Grant, Hettinger, Sioux, Stark | 90 min |
| Jun 25, 2:31 AM MDT | Mesoscale Discussion | SPC | Bottineau, Cavalier, Dunn, McHenry, McLean, Mountrail and 6 more | 89 min |
| Jun 25, 2:59 PM MDT | Mesoscale Discussion | SPC | Burleigh, Emmons, Grant, Kidder, Logan, Morton and 4 more | 91 min |
| Jun 25, 5:57 PM MDT | Mesoscale Discussion | SPC | Benson, Cavalier, Eddy, Nelson, Pembina, Ramsey and 3 more | 2 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2007Severe Thunderstorm Watches in South Dakota, 2007Severe Thunderstorm Watches in Montana, 2007Every severe thunderstorm watch in 2007
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.