Alert archive / Minnesota / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 502
The Storm Prediction Center issued this severe thunderstorm watch at Jul 22, 2012, 3:25 PM CDT for 24 counties in Minnesota; 4 counties in North Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 22, 2012, 3:25 PM CDT (20:25 UTC)
- Expired
- Jul 22, 2012, 9:49 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 28 counties
Aitkin County, MN, Becker County, MN, Beltrami County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Cook County, MN, Crow Wing County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Saint Louis County, MN, Wadena County, MN, Wilkin County, MN, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND
The radar
The Duluth radar (KDLH), 199 km from the middle of the area, began a volume at 20:24 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
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 3:54 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 66 min |
| Jul 22, 4:46 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching, Saint Louis | 44 min |
| Jul 22, 5:23 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching, Saint Louis | 37 min |
| Jul 22, 5:48 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland | 42 min |
| Jul 22, 5:54 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching, Saint Louis | 66 min |
| Jul 22, 6:06 PM CDT | Tornado Warning | DLH | Saint Louis | 39 min |
| Jul 22, 6:14 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Sargent | 61 min |
| Jul 22, 6:42 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Wilkin | 34 min |
| Jul 22, 6:49 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 41 min |
| Jul 22, 7:10 PM CDT | Severe Thunderstorm Warning | DLH | Itasca | 23 min |
| Jul 22, 7:14 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 31 min |
| Jul 22, 7:28 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 35 min |
| Jul 22, 7:31 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Otter Tail | 29 min |
| Jul 22, 7:40 PM CDT | Severe Thunderstorm Warning | DLH | Lake, Saint Louis | 50 min |
| Jul 22, 8:15 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 18 min |
| Jul 22, 8:19 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Hubbard, Wadena | 37 min |
| Jul 22, 8:44 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 24 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, 8.4 hours before the alert went out and 151 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
- 1489 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:51 PM CDT | Mesoscale Discussion | SPC | Lincoln, Lyon, Murray, Nobles, Pipestone, Redwood and 2 more | 54 min |
| Jul 22, 1:40 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Koochiching and 7 more | 95 min |
| Jul 22, 2:32 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 8 more | 88 min |
| Jul 22, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Traverse | 4 hr |
| Jul 22, 6:55 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 11 more | 95 min |
| Jul 21, 9:27 PM CDT | Mesoscale Discussion | SPC | Adams, Billings, Bowman, Burke, Divide, Dunn and 14 more | 63 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2012Severe Thunderstorm Watches in North Dakota, 2012Every severe thunderstorm watch in 2012
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.