A pair of low pressure systems moving along a stalled out frontal boundary produced moderate to heavy freezing rain over portions of Upper Michigan from the 26th into the 27th.

Winter Weather in SOUTHERN HOUGHTON, MICHIGAN
From 26-APR-17 20:00:00 to 27-APR-17 23:59:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Intermittent light freezing rain from the evening of the 26th through the 27th coated trees and other surfaces with a light glaze of ice.  Side roads were reported to be slippery.

Winter Weather in MARQUETTE, MICHIGAN
From 27-APR-17 02:00:00 to 27-APR-17 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Observers throughout the county reported a light glaze of ice on trees, cars and sidewalks on the 27th.

Winter Weather in BARAGA, MICHIGAN
From 27-APR-17 02:00:00 to 27-APR-17 12:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The observer at Three Lakes measured between 0.1 and 0.2 of an inch of ice accumulation from freezing rain.  Roads and sidewalks were reported to be very slippery.

Winter Weather in ALGER, MICHIGAN
From 27-APR-17 02:00:00 to 27-APR-17 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There were public reports of light icing on trees in Kiva and Eben Junction from light freezing rain.

Winter Weather in IRON, MICHIGAN
From 27-APR-17 01:00:00 to 27-APR-17 12:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

The spotter near Peavy Falls Dam observed a glaze of ice on trees and the ground.

Ice Storm in GOGEBIC, MICHIGAN
From 26-APR-17 01:00:00 to 27-APR-17 14:00:00 (CST-6)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Social Media

There were several public reports of moderate to heavy ice accumulation from freezing rain over the higher terrain around Bessemer and Wakefield. The coating of ice caused treacherous road conditions and extensive tree damage over the higher elevations of the county, mainly north of Bessemer and Wakefield.

Ice Storm in KEWEENAW, MICHIGAN
From 26-APR-17 20:00:00 to 27-APR-17 23:59:00 (EST-5)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Keweenaw County Road Commission estimated between half an inch to an inch of ice accumulation from freezing rain starting from the evening of the 26th and continuing
through the 27th.  The ice damaged large trees and coated roads and power lines.  Schools were closed throughout the county on the 27th.

Winter Weather in NORTHERN HOUGHTON, MICHIGAN
From 26-APR-17 20:00:00 to 27-APR-17 23:59:00 (EST-5)
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Social Media

There were public reports of one quarter to one half inch of ice accumulation from freezing rain over portions of northern Houghton County from the evening of the 26th through the 27th. The icing caused some tree damage over higher elevations and coated roads making travel very hazardous.  Many Houghton County area schools were closed on the 27th due to the icy roads.

Ice Storm in ONTONAGON, MICHIGAN
From 26-APR-17 02:00:00 to 27-APR-17 15:00:00 (EST-5)
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Officials at the Porcupine Mountains State Park reported that higher elevations of the park received over an inch of ice accumulation from freezing rain which was then covered by 2-4 inches of wet snow.  The combination of the ice and snow toppled thousands of large trees which caused extensive damage to 35-50 miles of hiking trails within the park.
Light to moderate accumulations of ice and snow were reported at lower elevations which led to minor tree damage and slippery conditions on area roads and sidewalks.