Alert archive / Indiana / Mesoscale Discussions in 2008
Mesoscale Discussion 1
The Storm Prediction Center issued this mesoscale discussion at Dec 31, 2007, 6:25 PM CST for Iroquois County, Kankakee County, Illinois; 14 counties in Indiana; 7 counties in Michigan. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 31, 2007, 6:25 PM CST (00:25 UTC)
- Expired
- Dec 31, 2007, 9:30 PM CST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Iroquois County, IL, Kankakee County, IL, Elkhart County, IN, Fulton County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, White County, IN, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Kalamazoo County, MI, Saint Joseph County, MI
The radar
The Northern Indiana radar (KIWX), 88 km from the middle of the area, began a volume at 00:26 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, 0.4 hours before the alert went out and 303 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
- 1619 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Dec 31, 9:28 PM CST | Mesoscale Discussion | SPC | Elkhart, LaGrange, Saint Joseph, Steuben | 4 hr |
Nearby
Mesoscale Discussions in Indiana, 2008Mesoscale Discussions in Michigan, 2008Mesoscale Discussions in Illinois, 2008Every mesoscale discussion 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.