Alert archive / Michigan / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 694
The Storm Prediction Center issued this severe thunderstorm watch at Jul 16, 2008, 4:33 PM EDT for 45 counties in Michigan. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 16, 2008, 4:33 PM EDT (20:33 UTC)
- Expired
- Jul 16, 2008, 11:30 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 45 counties
Alcona County, MI, Allegan County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Kent County, MI, Lake County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Ottawa County, MI, Roscommon County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Wexford County, MI
The radar
The NCL Michigan radar (KAPX), 116 km from the middle of the area, began a volume at 20:35 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
- 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
36 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 4:54 PM EDT | Severe Thunderstorm Warning | GRR | Lake | 51 min |
| Jul 16, 5:05 PM EDT | Severe Thunderstorm Warning | APX | Missaukee, Roscommon | 40 min |
| Jul 16, 5:10 PM EDT | Severe Thunderstorm Warning | GRR | Isabella | 50 min |
| Jul 16, 5:16 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Lapeer | 74 min |
| Jul 16, 5:20 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Mecosta | 40 min |
| Jul 16, 5:25 PM EDT | Severe Thunderstorm Warning | APX | Alcona, Iosco, Ogemaw, Oscoda | 65 min |
| Jul 16, 5:31 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 44 min |
| Jul 16, 5:42 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Lake, Mecosta, Osceola | 63 min |
| Jul 16, 5:43 PM EDT | Severe Thunderstorm Warning | APX | Gladwin, Ogemaw, Roscommon | 35 min |
| Jul 16, 5:53 PM EDT | Severe Thunderstorm Warning | GRR | Isabella, Mecosta | 67 min |
| Jul 16, 6:02 PM EDT | Severe Thunderstorm Warning | DTX | Midland, Saginaw | 88 min |
| Jul 16, 6:08 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella | 52 min |
| Jul 16, 6:17 PM EDT | Severe Thunderstorm Warning | DTX | Saint Clair | 42 min |
| Jul 16, 6:22 PM EDT | Flash Flood Warning | APX | Ogemaw | 3 hr |
| Jul 16, 6:27 PM EDT | Severe Thunderstorm Warning | GRR | Muskegon, Oceana | 78 min |
| Jul 16, 6:32 PM EDT | Severe Thunderstorm Warning | GRR | Clare, Isabella | 49 min |
| Jul 16, 6:40 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Montcalm | 50 min |
| Jul 16, 6:42 PM EDT | Severe Thunderstorm Warning | DTX | Bay, Saginaw | 93 min |
| Jul 16, 6:46 PM EDT | Severe Thunderstorm Warning | DTX | Sanilac | 38 min |
| Jul 16, 6:51 PM EDT | Severe Thunderstorm Warning | DTX | Genesee, Lapeer | 84 min |
| Jul 16, 6:52 PM EDT | Severe Thunderstorm Warning | APX | Gladwin | 53 min |
| Jul 16, 6:55 PM EDT | Severe Thunderstorm Warning | DTX | Saginaw | 95 min |
| Jul 16, 6:57 PM EDT | Severe Thunderstorm Warning | GRR | Allegan, Barry, Kent, Ottawa | 78 min |
| Jul 16, 6:58 PM EDT | Flash Flood Warning | GRR | Isabella | 3 hr |
| Jul 16, 7:11 PM EDT | Flash Flood Warning | DTX | Lapeer | 6 hr |
| Jul 16, 7:13 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Newaygo | 47 min |
| Jul 16, 7:18 PM EDT | Flash Flood Warning | DTX | Midland | 2 hr |
| Jul 16, 7:33 PM EDT | Severe Thunderstorm Warning | GRR | Kent | 42 min |
| Jul 16, 8:02 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Tuscola | 88 min |
| Jul 16, 8:13 PM EDT | Severe Thunderstorm Warning | DTX | Shiawassee | 92 min |
| Jul 16, 8:22 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot, Isabella, Mecosta, Montcalm | 68 min |
| Jul 16, 8:38 PM EDT | Severe Thunderstorm Warning | GRR | Barry, Calhoun, Eaton, Kalamazoo | 82 min |
| Jul 16, 8:42 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Ingham | 42 min |
| Jul 16, 8:50 PM EDT | Severe Thunderstorm Warning | DTX | Genesee | 55 min |
| Jul 16, 10:00 PM EDT | Severe Thunderstorm Warning | DTX | Oakland | 49 min |
| Jul 16, 10:07 PM EDT | Severe Thunderstorm Warning | DTX | Lapeer, Macomb, Saint Clair | 59 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
Detroit, MI (KDTX), launched 12:00Z, 8.6 hours before the alert went out and 174 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
- 973 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 59 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 16, 1:42 PM EDT | Mesoscale Discussion | SPC | Antrim, Arenac, Bay, Benzie, Clare, Clinton and 30 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 2008Every severe thunderstorm watch in 2008
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.