Alert archive / Michigan / Mesoscale Discussions in 2003
Mesoscale Discussion 1936
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2003, 10:59 AM EDT for 27 counties in Michigan. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2003, 10:59 AM EDT (14:59 UTC)
- Expired
- Jul 21, 2003, 1:00 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Allegan County, MI, Barry County, MI, Bay County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gladwin County, MI, Gratiot County, MI, Ionia County, MI, Isabella County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Roscommon County, MI, Saginaw County, MI, Van Buren County, MI, Wexford County, MI
The radar
The Grand Rapids radar (KGRR), 54 km from the middle of the area, began a volume at 15:01 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.0 hours before the alert went out and 216 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
- 425 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 75 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 |
|---|---|---|---|---|
| Jul 20, 10:39 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 12 more | 66 min |
| Jul 21, 12:45 AM EDT | Severe Thunderstorm Watch | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 10 more | 5 hr |
| Jul 21, 4:26 PM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Branch, Calhoun, Cass and 22 more | 94 min |
Nearby
Mesoscale Discussions in Michigan, 2003Every mesoscale discussion 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.