Alert archive / Minnesota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 655
The Storm Prediction Center issued this severe thunderstorm watch at Aug 27, 2007, 2:29 PM CDT for 21 counties in Minnesota; 16 counties in North Dakota. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2007, 2:29 PM CDT (19:29 UTC)
- Expired
- Aug 27, 2007, 10:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 37 counties
Aitkin County, MN, Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Mahnomen County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Red Lake County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 63 km from the middle of the area, began a volume at 19:30 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
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 2:40 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 48 min |
| Aug 27, 2:54 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 51 min |
| Aug 27, 3:05 PM CDT | Severe Thunderstorm Warning | FGF | Barnes | 55 min |
| Aug 27, 3:40 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail, Wadena | 50 min |
| Aug 27, 3:50 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 55 min |
| Aug 27, 3:51 PM CDT | Severe Thunderstorm Warning | MPX | Morrison | 24 min |
| Aug 27, 3:54 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure | 66 min |
| Aug 27, 3:57 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 63 min |
| Aug 27, 4:54 PM CDT | Severe Thunderstorm Warning | DLH | Itasca | 51 min |
| Aug 27, 4:58 PM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 47 min |
| Aug 27, 5:05 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 25 min |
| Aug 27, 5:15 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 30 min |
| Aug 27, 5:28 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 62 min |
| Aug 27, 5:33 PM CDT | Severe Thunderstorm Warning | DLH | Cass | 57 min |
| Aug 27, 5:45 PM CDT | Severe Thunderstorm Warning | FGF | Becker | 30 min |
| Aug 27, 5:46 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 59 min |
| Aug 27, 6:44 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Itasca | 46 min |
| Aug 27, 7:06 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 54 min |
| Aug 27, 7:56 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin | 49 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
Aberdeen, SD (KABR), launched 12:00Z, 7.5 hours before the alert went out and 247 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
- 3393 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 503 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 12.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 8:04 PM CDT | Mesoscale Discussion | SPC | Kittson, Marshall, Pennington, Polk, Red Lake, Roseau | 116 min |
| Aug 26, 10:25 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Koochiching, Mahnomen and 4 more | 65 min |
| Aug 27, 1:43 AM CDT | Mesoscale Discussion | SPC | Anoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 12 more | 92 min |
| Aug 27, 7:10 AM CDT | Mesoscale Discussion | SPC | Wilkin | 95 min |
| Aug 27, 10:14 AM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Itasca and 8 more | 91 min |
| Aug 27, 12:55 PM CDT | Mesoscale Discussion | SPC | Becker, Clay, Mahnomen, Norman, Otter Tail, Wilkin | 65 min |
| Aug 27, 5:34 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Carlton, Cass, Clay, Clearwater and 8 more | 116 min |
| Aug 27, 6:19 PM CDT | Severe Thunderstorm Watch | SPC | Carlton, Cook, Lake, Pine, Saint Louis | 7 hr |
| Aug 26, 11:07 PM CDT | Mesoscale Discussion | SPC | Adams, Burleigh, Emmons, Grant, Hettinger, Kidder and 2 more | 113 min |
| Aug 27, 3:02 AM CDT | Mesoscale Discussion | SPC | Dickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 2 more | 88 min |
| Aug 27, 3:14 AM CDT | Severe Thunderstorm Watch | SPC | Barnes, Burleigh, Cass, Dickey, Emmons, Griggs and 10 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 2007Severe 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; radar from the NEXRAD Level II archive.