Alert archive / North Dakota / Severe Thunderstorm Watches in 2006
Severe Thunderstorm Watch 652
The Storm Prediction Center issued this severe thunderstorm watch at Jul 28, 2006, 8:55 PM CDT for 7 counties in Minnesota; 25 counties in North Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2006, 8:55 PM CDT (01:55 UTC)
- Expired
- Jul 29, 2006, 3:41 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 32 counties
Becker County, MN, Clay County, MN, Grant County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Wilkin County, MN, Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND
The radar
The Bismarck radar (KBIS), 100 km from the middle of the area, began a volume at 01:54 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
- 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
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 9:15 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Oliver | 30 min |
| Jul 28, 9:24 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Sioux | 36 min |
| Jul 28, 9:45 PM CDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder | 30 min |
| Jul 28, 11:31 PM CDT | Severe Thunderstorm Warning | FGF | Mahnomen, Norman | 59 min |
| Jul 29, 12:25 AM CDT | Severe Thunderstorm Warning | BIS | Stutsman | 17 min |
| Jul 29, 12:33 AM CDT | Severe Thunderstorm Warning | FGF | Barnes | 42 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, 1.9 hours before the alert went out and 96 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
- 986 J/kg
- Mixed-layer CIN
- -522 J/kg
- Mixed-layer LCL
- 1656 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 394 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:35 PM CDT | Mesoscale Discussion | SPC | Carlton, Kanabec, Pine | 85 min |
| Jul 28, 9:07 PM CDT | Mesoscale Discussion | SPC | Anoka, Chisago, Isanti, Kanabec, Mille Lacs, Pine and 2 more | 53 min |
| Jul 28, 11:48 PM CDT | Mesoscale Discussion | SPC | Aitkin, Cass, Clearwater, Crow Wing, Douglas, Hubbard and 4 more | 87 min |
| Jul 29, 1:05 AM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 6 more | 55 min |
| Jul 29, 3:18 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 5 more | 5 hr |
| Jul 29, 4:41 AM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 5 more | 64 min |
| Jul 29, 1:51 PM CDT | Mesoscale Discussion | SPC | Big Stone, Grant, Otter Tail, Stevens, Traverse, Wilkin | 84 min |
| Jul 29, 3:40 PM CDT | Tornado Watch | SPC | Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 10 more | 6 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2006Severe Thunderstorm Watches in Minnesota, 2006Every severe thunderstorm watch in 2006
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.