Alert archive / Minnesota / Severe Thunderstorm Watches in 2011
Severe Thunderstorm Watch 653
The Storm Prediction Center issued this severe thunderstorm watch at Jul 17, 2011, 4:34 PM CDT for 25 counties in Minnesota; 5 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2011, 4:34 PM CDT (21:34 UTC)
- Expired
- Jul 18, 2011, 12:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 30 counties
Aitkin County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Itasca County, MN, Kanabec County, MN, Kandiyohi County, MN, Koochiching County, MN, Lake County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pine County, MN, Pope County, MN, Renville County, MN, Saint Louis County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 82 km from the middle of the area, began a volume at 21:35 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 4:52 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 38 min |
| Jul 17, 5:01 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 44 min |
| Jul 17, 5:15 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 30 min |
| Jul 17, 5:41 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 21 min |
| Jul 17, 5:45 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Douglas | 30 min |
| Jul 17, 6:14 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron | 46 min |
| Jul 17, 6:30 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 30 min |
| Jul 17, 6:52 PM CDT | Flash Flood Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 3 hr |
| Jul 17, 7:01 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer, Washburn | 44 min |
| Jul 17, 7:06 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 24 min |
| Jul 17, 7:38 PM CDT | Severe Thunderstorm Warning | DLH | Price, Sawyer, Washburn | 52 min |
| Jul 17, 9:08 PM CDT | Severe Thunderstorm Warning | MPX | Douglas, Pope, Stevens | 67 min |
| Jul 17, 9:49 PM CDT | Severe Thunderstorm Warning | MPX | Pope, Stevens | 56 min |
| Jul 17, 10:26 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Pope, Stearns, Stevens, Swift | 64 min |
| Jul 17, 11:23 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Renville, Swift | 52 min |
| Jul 17, 11:54 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, McLeod, Meeker, Renville, Sibley | 51 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
International Fa, MN (KINL), launched 12:00Z, 9.6 hours before the alert went out and 133 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
- 1146 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 1112 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 9:25 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Kittson, Lake of the Woods and 7 more | 95 min |
| Jul 16, 11:37 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 9 more | 23 min |
| Jul 17, 9:15 AM CDT | Mesoscale Discussion | SPC | Becker, Clay, Clearwater, Kittson, Mahnomen, Marshall and 4 more | 2 hr |
| Jul 17, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 8 more | 7 hr |
| Jul 17, 10:24 AM CDT | Mesoscale Discussion | SPC | Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 5 more | 66 min |
| Jul 17, 12:49 PM CDT | Tornado Watch | SPC | Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 3 more | 3 hr |
| Jul 17, 1:42 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Beltrami, Benton, Cass, Clay and 18 more | 93 min |
| Jul 17, 3:37 PM CDT | Tornado Watch | SPC | Becker, Clay, Grant, Otter Tail, Wadena, Wilkin | 6 hr |
| Jul 17, 6:34 PM CDT | Mesoscale Discussion | SPC | Big Stone, Traverse | 56 min |
| Jul 17, 6:11 PM CDT | Mesoscale Discussion | SPC | Ashland, Florence, Forest, Iron, Lincoln, Oneida and 4 more | 64 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2011Severe Thunderstorm Watches in Wisconsin, 2011Every severe thunderstorm watch in 2011
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.