Alert archive / Minnesota / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 414
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2007, 1:09 AM CDT for 5 counties in Minnesota. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2007, 1:09 AM CDT (06:09 UTC)
- Expired
- Jun 18, 2007, 4:00 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
Counties Aitkin County, MN, Cass County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN
The radar
The Duluth radar (KDLH), 179 km from the middle of the area, began a volume at 06:10 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
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 1:24 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca, Koochiching | 61 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 00:00Z, 6.2 hours before the alert went out and 115 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
- 573 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 326 m²/s²
- 0-3 km storm-relative helicity
- 494 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:59 PM CDT | Mesoscale Discussion | SPC | Beltrami, Clay, Clearwater, Itasca, Kittson, Koochiching and 9 more | 91 min |
| Jun 17, 10:43 PM CDT | Mesoscale Discussion | SPC | Becker, Big Stone, Clay, Clearwater, Grant, Kittson and 9 more | 62 min |
| Jun 18, 12:03 AM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more | 3 hr |
| Jun 18, 12:44 AM CDT | Mesoscale Discussion | SPC | Aitkin, Beltrami, Benton, Carlton, Cass, Clearwater and 14 more | 61 min |
| Jun 18, 12:46 PM CDT | Severe Thunderstorm Watch | SPC | Dodge, Fillmore, Goodhue, Houston, Mower, Olmsted and 2 more | 7 hr |
| Jun 18, 3:27 PM CDT | Mesoscale Discussion | SPC | Fillmore, Houston, Mower, Olmsted, Wabasha, Winona | 93 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 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.