Alert archive / Michigan / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 170
The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2004, 12:55 PM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2004, 12:55 PM CDT (17:55 UTC)
- Expired
- May 9, 2004, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 57 counties
Cook County, IL, DuPage County, IL, Lake County, IL, Will County, IL, Elkhart County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Porter County, IN, Saint Joseph County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Bay County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Mecosta County, MI, Midland County, MI, Monroe County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Ottawa County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Kenosha County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Washington County, WI
The radar
The Grand Rapids radar (KGRR), 36 km from the middle of the area, began a volume at 17:55 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.
Warnings issued inside it
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 1:28 PM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Milwaukee, Walworth, Waukesha | 47 min |
| May 9, 1:43 PM CDT | Severe Thunderstorm Warning | IWX | Cass | 47 min |
| May 9, 1:49 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Milwaukee, Racine | 56 min |
| May 9, 2:01 PM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Racine, Waukesha | 29 min |
| May 9, 2:17 PM CDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 58 min |
| May 9, 2:38 PM CDT | Severe Thunderstorm Warning | GRR | Barry, Eaton | 52 min |
| May 9, 3:23 PM CDT | Severe Thunderstorm Warning | GRR | Van Buren | 52 min |
| May 9, 3:28 PM CDT | Severe Thunderstorm Warning | GRR | Barry | 47 min |
| May 9, 3:44 PM CDT | Severe Thunderstorm Warning | GRR | Clinton | 46 min |
| May 9, 3:48 PM CDT | Severe Thunderstorm Warning | GRR | Ingham | 57 min |
| May 9, 4:03 PM CDT | Severe Thunderstorm Warning | DTX | Livingston | 72 min |
| May 9, 4:11 PM CDT | Severe Thunderstorm Warning | DTX | Washtenaw | 79 min |
| May 9, 4:13 PM CDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 62 min |
| May 9, 4:15 PM CDT | Severe Thunderstorm Warning | GRR | Allegan, Ottawa | 45 min |
| May 9, 4:17 PM CDT | Severe Thunderstorm Warning | GRR | Newaygo | 28 min |
| May 9, 4:23 PM CDT | Severe Thunderstorm Warning | DTX | Oakland | 97 min |
| May 9, 4:58 PM CDT | Severe Thunderstorm Warning | GRR | Kent | 47 min |
| May 9, 5:01 PM CDT | Severe Thunderstorm Warning | DTX | Monroe | 59 min |
| May 9, 5:29 PM CDT | Severe Thunderstorm Warning | GRR | Ionia, Montcalm | 61 min |
| May 9, 5:33 PM CDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 42 min |
| May 9, 5:49 PM CDT | Severe Thunderstorm Warning | GRR | Calhoun | 56 min |
| May 9, 6:12 PM CDT | Severe Thunderstorm Warning | GRR | Gratiot | 33 min |
| May 9, 6:16 PM CDT | Severe Thunderstorm Warning | LOT | Will | 44 min |
| May 9, 6:17 PM CDT | Severe Thunderstorm Warning | DTX | Saginaw | 73 min |
| May 9, 6:27 PM CDT | Severe Thunderstorm Warning | GRR | Jackson | 63 min |
| May 9, 6:36 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Will | 39 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, 5.9 hours before the alert went out and 209 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
- 834 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 68 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 |
|---|---|---|---|---|
| May 8, 9:55 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, Lake, McHenry, Stephenson, Winnebago | 2 hr |
| May 9, 1:22 AM CDT | Mesoscale Discussion | SPC | Hancock | 23 min |
| May 9, 11:48 AM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 4 more | 2 hr |
| May 9, 2:46 PM CDT | Mesoscale Discussion | SPC | Cook, Lake | 89 min |
| May 9, 4:46 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Grundy, Henry and 10 more | 59 min |
| May 9, 5:17 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Lake, Will | 88 min |
| May 9, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Grundy, Kankakee, Kendall, LaSalle and 3 more | 4 hr |
| May 8, 7:16 PM CDT | Mesoscale Discussion | SPC | Elkhart, Kosciusko, LaGrange, Marshall, Noble, Saint Joseph and 1 more | 119 min |
| May 9, 9:35 AM CDT | Mesoscale Discussion | SPC | Steuben | 55 min |
| May 8, 8:46 PM CDT | Mesoscale Discussion | SPC | Clinton, Eaton, Genesee, Gratiot, Ingham, Ionia and 8 more | 119 min |
| May 9, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Gogebic, Ontonagon | 8 hr |
| May 9, 3:29 PM CDT | Mesoscale Discussion | SPC | Buffalo, Chippewa, Clark, Dunn, Eau Claire, Pepin and 4 more | 91 min |
| May 9, 3:55 PM CDT | Tornado Watch | SPC | Barron, Buffalo, Dunn, Pepin, Pierce, Saint Croix | 5 hr |
| May 9, 5:38 PM CDT | Mesoscale Discussion | SPC | Barron, Buffalo, Burnett, Chippewa, Clark, Douglas and 12 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Michigan, 2004Severe Thunderstorm Watches in Indiana, 2004Severe Thunderstorm Watches in Wisconsin, 2004Every severe thunderstorm watch in 2004
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.