Alert archive / Michigan / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 314
The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2017, 2:30 PM EDT for 13 counties in Michigan. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 11, 2017, 2:30 PM EDT (18:30 UTC)
- Expired
- Jun 11, 2017, 5:59 PM EDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Alpena County, MI, Antrim County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Emmet County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Montmorency County, MI, Otsego County, MI, Presque Isle County, MI, Schoolcraft County, MI
The radar
The NCL Michigan radar (KAPX), 106 km from the middle of the area, began a volume at 18:30 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
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 |
|---|---|---|---|---|
| Jun 11, 3:12 PM EDT | Severe Thunderstorm Warning | MQT | Delta, Schoolcraft | 51 min |
| Jun 11, 3:39 PM EDT | Severe Thunderstorm Warning | APX | Charlevoix, Chippewa, Mackinac | 50 min |
| Jun 11, 3:51 PM EDT | Severe Thunderstorm Warning | APX | Leelanau | 33 min |
| Jun 11, 4:20 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Emmet, Mackinac | 55 min |
| Jun 11, 4:48 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Chippewa, Mackinac | 48 min |
| Jun 11, 5:03 PM EDT | Severe Thunderstorm Warning | APX | Cheboygan, Presque Isle | 45 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
Alpena, MI (KAPX), launched 12:00Z, 6.5 hours before the alert went out and 224 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
- 1296 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 9:12 PM EDT | Mesoscale Discussion | SPC | Baraga, Gogebic, Houghton, Keweenaw, Ontonagon | 2 hr |
| Jun 11, 10:30 AM EDT | Mesoscale Discussion | SPC | Iron | 60 min |
| Jun 11, 11:39 AM EDT | Severe Thunderstorm Watch | SPC | Delta, Dickinson, Gogebic, Iron, Menominee | 5 hr |
| Jun 11, 1:00 PM EDT | Mesoscale Discussion | SPC | Dickinson, Menominee | 2 hr |
| Jun 11, 3:46 PM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Charlevoix, Cheboygan, Chippewa and 11 more | 119 min |
| Jun 11, 7:20 PM EDT | Mesoscale Discussion | SPC | Iron | 2 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 2017Every severe thunderstorm watch in 2017
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.