An area of low pressure moved from Kansas City, Missouri to north of Pittsburgh, Pennsylvania. Snow spread into southwest lower Michigan out ahead of the low, starting in South Haven at around 2:00 a.m. on the nineteenth.
The snow quickly spread north and began in Mount Pleasant at around 4:30 a.m.  Heavy Snow occurred across most of the area between 5:00 a.m. and 1:00 pm, with snowfall rates reaching 1 to 2 inches per hour at times.  Thundersnow was even reported at locations across southern lower Michigan, evidence to the instability in place with this system.
Some sleet and freezing rain mixed in along the Interstate 94 corridor. The heaviest snow occurred in a swath from Pentwater south to Holland, east through Newaygo, Grand Rapids, Alma and St. John's. Another maximum of snow was found across south central lower Michigan from Bellevue in Eaton county southeast to Vandercook Lake in Jackson county.

Winter Storm in MECOSTA, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in ISABELLA, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in OCEANA, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Eight to twelve inches of snow was reported.

Winter Storm in NEWAYGO, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to twelve inches of snow was reported.

Winter Storm in OSCEOLA, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in CLARE, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in MUSKEGON, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in OTTAWA, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in KENT, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in GRATIOT, MICHIGAN
From 19-DEC-08 04:30:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in INGHAM, MICHIGAN
From 19-DEC-08 04:30:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in MASON, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in LAKE, MICHIGAN
From 19-DEC-08 05:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

Six to nine inches of snow was reported.

Winter Storm in EATON, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in MONTCALM, MICHIGAN
From 19-DEC-08 04:30:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in CLINTON, MICHIGAN
From 19-DEC-08 04:30:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in KALAMAZOO, MICHIGAN
From 19-DEC-08 03:00:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in ALLEGAN, MICHIGAN
From 19-DEC-08 03:30:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in CALHOUN, MICHIGAN
From 19-DEC-08 03:30:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in IONIA, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 14:00:00 (EST-5)
Reported by: Trained Spotter

A total of eight to twelve inches of snow was reported.

Winter Storm in BARRY, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in JACKSON, MICHIGAN
From 19-DEC-08 04:00:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.

Winter Storm in VAN BUREN, MICHIGAN
From 19-DEC-08 03:00:00 to 19-DEC-08 13:30:00 (EST-5)
Reported by: Trained Spotter

Four to eight inches of snow and ice pellets were reported.