Alert archive / North Dakota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 475
The Storm Prediction Center issued this severe thunderstorm watch at Jul 2, 2007, 10:13 PM MDT for 19 counties in North Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 2, 2007, 10:13 PM MDT (04:13 UTC)
- Expired
- Jul 3, 2007, 3:00 AM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Billings County, ND, Bottineau County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Stark County, ND, Ward County, ND, Williams County, ND
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
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
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 |
|---|---|---|---|---|
| Jul 2, 11:01 PM MDT | Severe Thunderstorm Warning | BIS | Williams | 52 min |
| Jul 3, 12:37 AM MDT | Severe Thunderstorm Warning | BIS | Billings, Dunn, McLean, Mercer, Mountrail, Ward | 53 min |
| Jul 3, 1:41 AM MDT | Severe Thunderstorm Warning | BIS | McHenry, McLean, Mercer, Pierce, Sheridan | 64 min |
| Jul 3, 2:46 AM MDT | Severe Thunderstorm Warning | BIS | Pierce, Wells | 59 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 00:00Z, 4.2 hours before the alert went out and 194 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
- 1417 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1562 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:45 PM MDT | Mesoscale Discussion | SPC | Burke, Divide, Mountrail, Renville, Ward, Williams | 90 min |
| Jul 2, 9:55 PM MDT | Mesoscale Discussion | SPC | Benson, Billings, Bottineau, Burke, Burleigh, Divide and 22 more | 65 min |
| Jul 3, 12:58 AM MDT | Mesoscale Discussion | SPC | Adams, Barnes, Benson, Billings, Bottineau, Bowman and 31 more | 2 hr |
| Jul 3, 1:21 AM MDT | Severe Thunderstorm Watch | SPC | Adams, Barnes, Benson, Bowman, Burleigh, Cass and 24 more | 7 hr |
| Jul 3, 4:41 AM MDT | Mesoscale Discussion | SPC | Adams, Barnes, Bowman, Cass, Dickey, Emmons and 15 more | 2 hr |
| Jul 3, 5:39 AM MDT | Mesoscale Discussion | SPC | Richland | 2 hr |
Nearby
Severe Thunderstorm Watches in North 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.