Alert archive / North Dakota / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 907
The Storm Prediction Center issued this severe thunderstorm watch at Sep 22, 2008, 7:35 PM CDT for 6 counties in Minnesota; 26 counties in North Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 22, 2008, 7:35 PM CDT (00:35 UTC)
- Expired
- Sep 23, 2008, 4:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 32 counties
Kittson County, MN, Marshall County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 81 km from the middle of the area, began a volume at 00:38 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
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 7:39 PM CDT | Severe Thunderstorm Warning | BIS | Foster, Stutsman, Wells | 66 min |
| Sep 22, 8:29 PM CDT | Flash Flood Warning | FGF | Eddy | 12 hr |
| Sep 22, 8:33 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy, Nelson | 57 min |
| Sep 22, 8:45 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Nelson, Ramsey | 60 min |
| Sep 22, 8:51 PM CDT | Flash Flood Warning | FGF | Benson, Nelson, Ramsey | 12 hr |
| Sep 22, 10:51 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 39 min |
| Sep 22, 11:26 PM CDT | Severe Thunderstorm Warning | BIS | Wells | 29 min |
| Sep 22, 11:55 PM CDT | Flash Flood Warning | BIS | Wells | 3 hr |
| Sep 23, 12:31 AM CDT | Severe Thunderstorm Warning | BIS | Kidder, Stutsman | 44 min |
| Sep 23, 12:41 AM CDT | Flash Flood Warning | BIS | Foster, Wells | 3 hr |
| Sep 23, 12:52 AM CDT | Flash Flood Warning | FGF | Benson, Eddy, Ramsey, Towner | 8 hr |
| Sep 23, 1:54 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Grand Forks, Griggs, Nelson, Ramsey, Steele and 1 more | 66 min |
| Sep 23, 2:14 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 39 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, 0.6 hours before the alert went out and 259 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
- 1686 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 150 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 |
|---|---|---|---|---|
| Sep 22, 10:21 PM CDT | Mesoscale Discussion | SPC | Kittson, Marshall, Pennington, Polk, Red Lake, Roseau | 54 min |
| Sep 23, 1:37 AM CDT | Mesoscale Discussion | SPC | Kittson, Marshall, Norman, Pennington, Polk, Red Lake and 1 more | 23 min |
| Sep 23, 1:45 PM CDT | Mesoscale Discussion | SPC | Anoka, Blue Earth, Carlton, Carver, Chisago, Dakota and 19 more | 2 hr |
| Sep 22, 10:58 PM CDT | Mesoscale Discussion | SPC | Sargent | 62 min |
| Sep 23, 1:13 PM CDT | Mesoscale Discussion | SPC | Benson, Burleigh, Eddy, Emmons, Foster, Griggs and 16 more | 2 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2008Severe Thunderstorm Watches in Minnesota, 2008Every severe thunderstorm watch in 2008
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.