Alert archive / Michigan / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 927
The Storm Prediction Center issued this severe thunderstorm watch at Sep 24, 2003, 1:20 PM EST for 23 counties in Indiana; 29 counties in Michigan; Defiance County, Williams County, Ohio. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 24, 2003, 1:20 PM EST (18:20 UTC)
- Expired
- Sep 24, 2003, 8:00 PM EST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Adams County, IN, Allen County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry 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, 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, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Saginaw County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Defiance County, OH, Williams County, OH
The radar
The Northern Indiana radar (KIWX), 55 km from the middle of the area, began a volume at 18:22 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 24, 4:23 PM EST | Severe Thunderstorm Warning | GRR | Barry | 37 min |
| Sep 24, 6:36 PM EST | Severe Thunderstorm Warning | DTX | Lenawee, Monroe, Washtenaw | 54 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, 6.3 hours before the alert went out and 210 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
- 1911 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 250 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 |
|---|---|---|---|---|
| Sep 23, 11:41 PM EST | Mesoscale Discussion | SPC | Benton, Lake, Newton | 2 hr |
| Sep 24, 12:41 PM EST | Mesoscale Discussion | SPC | Benton, Carroll, Cass, Elkhart, Fountain, Fulton and 19 more | 2 hr |
| Sep 24, 2:58 PM EST | Mesoscale Discussion | SPC | Elkhart, LaGrange, LaPorte, Saint Joseph, Steuben | 62 min |
| Sep 24, 3:26 PM EST | Mesoscale Discussion | SPC | Boone, Brown, Clay, Clinton, Daviess, Delaware and 28 more | 94 min |
| Sep 24, 5:37 PM EST | Mesoscale Discussion | SPC | Allen, Cass, DeKalb, Elkhart, Fulton, Huntington and 16 more | 83 min |
| Sep 24, 11:34 AM EST | Mesoscale Discussion | SPC | Antrim, Cheboygan, Clare, Crawford, Emmet, Grand Traverse and 11 more | 116 min |
Nearby
Severe Thunderstorm Watches in Michigan, 2003Severe Thunderstorm Watches in Indiana, 2003Severe Thunderstorm Watches in Ohio, 2003Every severe thunderstorm watch in 2003
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.