Alert archive / North Dakota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 497
The Storm Prediction Center issued this severe thunderstorm watch at Jul 9, 2007, 1:01 PM MDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2007, 1:01 PM MDT (19:01 UTC)
- Expired
- Jul 9, 2007, 8:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 37 counties
Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Mountrail County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Butte County, SD, Custer County, SD, Haakon County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Campbell County, WY, Crook County, WY, Weston County, WY
The radar
The Glasgow radar (KGGW), 217 km from the middle of the area, began a volume at 19:03 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
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
45 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:34 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 56 min |
| Jul 9, 1:58 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Prairie | 62 min |
| Jul 9, 2:09 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 66 min |
| Jul 9, 2:25 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 65 min |
| Jul 9, 2:48 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Wibaux | 57 min |
| Jul 9, 2:50 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 55 min |
| Jul 9, 3:00 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 60 min |
| Jul 9, 3:06 PM MDT | Severe Thunderstorm Warning | BIS | Hettinger, Slope | 54 min |
| Jul 9, 3:08 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 36 min |
| Jul 9, 3:22 PM MDT | Severe Thunderstorm Warning | GGW | Sheridan | 38 min |
| Jul 9, 3:24 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 31 min |
| Jul 9, 3:24 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley | 43 min |
| Jul 9, 3:36 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 54 min |
| Jul 9, 3:43 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 62 min |
| Jul 9, 3:50 PM MDT | Severe Thunderstorm Warning | BIS | Bowman, Slope | 40 min |
| Jul 9, 3:51 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 42 min |
| Jul 9, 3:53 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 67 min |
| Jul 9, 3:56 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 64 min |
| Jul 9, 3:59 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger, Slope | 46 min |
| Jul 9, 4:04 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 56 min |
| Jul 9, 4:27 PM MDT | Severe Thunderstorm Warning | BIS | Bowman | 33 min |
| Jul 9, 4:46 PM MDT | Severe Thunderstorm Warning | BIS | Adams | 59 min |
| Jul 9, 4:47 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 58 min |
| Jul 9, 4:50 PM MDT | Severe Thunderstorm Warning | GGW | Richland | 25 min |
| Jul 9, 4:51 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 54 min |
| Jul 9, 5:11 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, McLean, Mountrail | 49 min |
| Jul 9, 5:11 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 34 min |
| Jul 9, 5:19 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 56 min |
| Jul 9, 5:24 PM MDT | Severe Thunderstorm Warning | BIS | Mountrail | 51 min |
| Jul 9, 5:24 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Hettinger, Stark | 45 min |
| Jul 9, 5:26 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 19 min |
| Jul 9, 5:36 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 54 min |
| Jul 9, 5:39 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 66 min |
| Jul 9, 5:43 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Sioux | 32 min |
| Jul 9, 5:59 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 61 min |
| Jul 9, 6:05 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 25 min |
| Jul 9, 6:08 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 45 min |
| Jul 9, 6:24 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 66 min |
| Jul 9, 6:43 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Ziebach | 62 min |
| Jul 9, 6:47 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 58 min |
| Jul 9, 6:59 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 46 min |
| Jul 9, 7:00 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 33 min |
| Jul 9, 7:25 PM MDT | Severe Thunderstorm Warning | UNR | Haakon | 65 min |
| Jul 9, 7:53 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 67 min |
| Jul 9, 7:57 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 18 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, 7.0 hours before the alert went out and 297 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
- 1063 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 103 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 |
|---|---|---|---|---|
| Jul 9, 12:31 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Daniels, Dawson, Fallon, McCone and 5 more | 89 min |
| Jul 9, 3:40 PM MDT | Mesoscale Discussion | SPC | Carter, Fallon, Wibaux | 95 min |
| Jul 9, 4:15 PM MDT | Severe Thunderstorm Watch | SPC | Benson, Bottineau, Burleigh, Cavalier, Dickey, Eddy and 22 more | 8 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2007Severe Thunderstorm Watches in Montana, 2007Severe Thunderstorm Watches in South Dakota, 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.