Alert archive / Michigan / Mesoscale Discussions in 2004
Mesoscale Discussion 1938
The Storm Prediction Center issued this mesoscale discussion at Aug 9, 2004, 9:14 PM EST for 16 counties in Indiana; 47 counties in Michigan; Williams County, Ohio. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2004, 9:14 PM EST (02:14 UTC)
- Expired
- Aug 9, 2004, 10:15 PM EST
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 64 counties
Allen County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Whitley County, IN, Allegan County, MI, Alpena County, MI, Antrim County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Charlevoix County, MI, Cheboygan County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Eaton County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kalkaska County, MI, Kent County, MI, Lake County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Montmorency County, MI, Newaygo County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Ottawa County, MI, Presque Isle County, MI, Roscommon County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Wexford County, MI, Williams County, OH
The radar
The Grand Rapids radar (KGRR), 35 km from the middle of the area, began a volume at 02:14 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.
The nearest sounding before it
Detroit, MI (KDTX), launched 00:00Z, 2.2 hours before the alert went out and 180 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
- 102 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1368 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:22 PM EST | Mesoscale Discussion | SPC | Benton, Carroll, Cass, Clinton, DeKalb, Elkhart and 15 more | 53 min |
| Aug 10, 12:10 PM EST | Severe Thunderstorm Watch | SPC | Ashtabula, Columbiana, Jefferson, Mahoning, Trumbull | 7 hr |
| Aug 10, 2:17 PM EST | Mesoscale Discussion | SPC | Athens, Belmont, Gallia, Guernsey, Hocking, Jackson and 8 more | 88 min |
| Aug 10, 3:16 PM EST | Mesoscale Discussion | SPC | Columbiana, Jefferson | 89 min |
Nearby
Mesoscale Discussions in Michigan, 2004Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Ohio, 2004Every mesoscale discussion 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.