Great Lakes Ice Forecasts - Text

Ice Analysis

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Great Lakes Ice Outlook (CLEICELIO)

Issued Monday Wednesday Friday (product only valid when ice is present on the Great Lakes)

Freeze-Up/Break-Up Outlook (NWS CLE)

Canadian Daily Ice Forecast 

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FICN19 CWIS 011545
Ice forecasts for the Great Lakes issued by Environment Canada at
12:00 p.m. EDT Sunday 1 May 2022 for today tonight and Monday.
The next scheduled forecasts will be issued at 12:00 p.m. Monday.

Western Lake Superior.
Open water except 2 tenths thick lake ice in and near Thunder Bay.
Consolidated very thick lake ice in Black Bay and Nipigon Bay.

Eastern Lake Superior
Whitefish Bay.
Open water.

Southern Lake Huron
Lake St. Clair
Lake Erie
Lake Ontario.
Ice free.

Northern Lake Huron
Georgian Bay.
Open water.

North Channel.
Open water except CONSOLIDATED rotten thick lake ice along parts on
the coast in the extreme eastern section.

Green Bay
Northern Lake Michigan.
Open water.

Southern Lake Michigan.
Ice free.

The Lake Michigan ice description has been pared by the U.S.
National Ice Center.

End

 
 
 
 
 

Freezing Degree Day Information

	CLEWRKLIO DEF 
TTAA00 KCLE 311715
 
FREEZING DEGREE DAY ACCUMULATIONS AT SELECTED STATIONS
COMPARED TO NORMAL CALCULATED ON Tue May 31:
 
LOCATION           DATE   NORMAL CURRENT
----------------------------------------
    
   DULUTH,   MN  MAY   30  574  413    
MARQUETTE,   MI  MAY   30  995  716    
SAU_S_MAR,   MI  MAY   30  565  123    
 GREENBAY,   WI  MAY   30   30    0    
MILWAUKEE,   WI  MAY   30    0    0    
  CHICAGO,   IL  MAY   30    0    0    
 MUSKEGON,   MI  MAY   30    0    0    
   ALPENA,   MI  MAY   30  113    0    
  DETROIT,   MI  MAY   30    0    0    
   TOLEDO,   OH  MAY   30    0    0    
CLEVELAND,   OH  MAY   30    0    0    
  BUFFALO,   NY  MAY   30    0    0    
 
 

National Ice Center 30 day ice outlook

					
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FECN19 CWIS 291800
THIRTY-DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED BY ENVIRONMENT CANADA ON 29 APRIL 2022 FOR MAY. THE NEXT SCHEDULED BULLETIN WILL BE ISSUED ON 13 MAY 2022.

Lake Superior

Average air temperatures for April were below normal for Lake Superior. Temperatures are expected to be near to below normal for May.

Thunder Bay.
April 29-May 3:
- Open water except 1-3 tenths thick and very thick lake ice along the western shore. 7-8 tenths thick and very thick lake ice in the northeastern section. Consolidated rotten thick and very thick lake ice in the extreme northeastern section
May 4-8:
- Open water except 1-3 tenths thick and very thick lake ice in the northeastern section. Consolidated rotten thick and very thick lake ice in the extreme northeastern section
May 9-11:
- Open water except 7-8 tenths very thick lake ice in the extreme northeastern section.
May 12-31:
- Open water.

Nipigon and Black Bays.
April 29-May 5:
- Consolidated rotten very thick lake ice.
May 6-10:
- 4-6 tenths very thick lake ice except consolidated rotten very thick lake ice in northern Black Bay and western Nipigon Bay.
May 11-15:
- Open water except 7-8 tenths very thick lake ice in northern Black Bay and western Nipigon Bay.
May 16-31:
- Open water.

From Grand Marais Minnesota to the entrance to Nipigon Bay.
April 29-May 5:
- Open water except 1-3 tenths very thick lake ice near the entrance to Thunder Bay, Black Bay and Nipigon Bay.
May 6-31:
- Open water.

From Grand Marais to Duluth.
May 1-31:
- Open water.

Southern Lake Superior west of Keweenaw Peninsula.
April 29-May 5:
- Open water except 1-3 tenths thick lake ice along the shore between Duluth and the Apostle Islands. 4-6 tenths thick and very thick lake ice in Chequamegon Bay.
May 6-31:
- Open water.

Southern Lake Superior east of the Keweenaw Peninsula.
April 29-May 31:
- Open water.

Whitefish Bay.
April 29-May 5:
- 1-3 tenths thick lake ice in the northeastern section.
May 6-31:
- Open water.

From Whitefish Bay northwards to Michipicoten Bay.
April 29-May 1:
- Open water except 1-3 tenths thick lake ice in the eastern section.
May 2-31:
- Open water.

From Michipicoten Bay to the entrance to Nipigon Bay.
April 29-May 31:
- Open water.

Elsewhere in Lake Superior.
April 29-May 31:
- Open water to ice free.

Lake Michigan

Average air temperatures for April were near to below normal for Lake Michigan. Air temperatures are forecast to continue to be near normal to below for May.

Green Bay.
Northeastern Lake Michigan.
Elsewhere in Lake Michigan.
April 29-May 31:
- Open water to ice free.

Lake Huron and Georgian Bay

Average air temperatures for April were near normal for Lake Huron and Georgian Bay. Air temperatures are forecast to be near to below normal for May. 

North Channel.
April 29-May 3:
- Open water except 1-3 tenths thick lake ice in the western section. 4-6 tenths thick lake ice in the eastern section. 
May 4-6:
- Open water except 1-3 tenths thick lake ice in the eastern section.
May 7-31:
- Open water

St Mary’s River.
April 29-May 3:
- 1-3 tenths thick lake ice.
May 4-31:
- Open water.

South of Manitoulin Island westward to north-western Lake Huron
North-western Lake Huron near the Straits of Mackinac
From north-western Lake Huron to Saginaw Bay
Saginaw Bay
The southern and eastern shore of Lake Huron
Georgian Bay
Elsewhere in Lake Huron.
April 29-May 31:
- Open water to ice free

Lake Erie and Lake St. Clair

Average air temperatures for April were near normal for Lake Erie and Lake St. Clair. Air temperatures are forecast to be near normal May. 

Lake St Clair and the Western Basin.
The rest of Lake Erie.
April 29-May 31:
- Open water to ice free.

Lake Ontario

Average air temperatures for April were near normal for Lake Ontario. Air temperatures are forecast to be near normal for May. 

Northeastern Lake Ontario
Bay of Quinte.
St Lawrence River.
Elsewhere in Lake Ontario.
April 29-May 31:
- Open water to ice free.

END

 
 
 
 
 

Canadian 30-day ice outlook

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FECN19 CWIS 291800
THIRTY-DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED BY ENVIRONMENT CANADA ON 29 APRIL 2022 FOR MAY. THE NEXT SCHEDULED BULLETIN WILL BE ISSUED ON 13 MAY 2022.

Lake Superior

Average air temperatures for April were below normal for Lake Superior. Temperatures are expected to be near to below normal for May.

Thunder Bay.
April 29-May 3:
- Open water except 1-3 tenths thick and very thick lake ice along the western shore. 7-8 tenths thick and very thick lake ice in the northeastern section. Consolidated rotten thick and very thick lake ice in the extreme northeastern section
May 4-8:
- Open water except 1-3 tenths thick and very thick lake ice in the northeastern section. Consolidated rotten thick and very thick lake ice in the extreme northeastern section
May 9-11:
- Open water except 7-8 tenths very thick lake ice in the extreme northeastern section.
May 12-31:
- Open water.

Nipigon and Black Bays.
April 29-May 5:
- Consolidated rotten very thick lake ice.
May 6-10:
- 4-6 tenths very thick lake ice except consolidated rotten very thick lake ice in northern Black Bay and western Nipigon Bay.
May 11-15:
- Open water except 7-8 tenths very thick lake ice in northern Black Bay and western Nipigon Bay.
May 16-31:
- Open water.

From Grand Marais Minnesota to the entrance to Nipigon Bay.
April 29-May 5:
- Open water except 1-3 tenths very thick lake ice near the entrance to Thunder Bay, Black Bay and Nipigon Bay.
May 6-31:
- Open water.

From Grand Marais to Duluth.
May 1-31:
- Open water.

Southern Lake Superior west of Keweenaw Peninsula.
April 29-May 5:
- Open water except 1-3 tenths thick lake ice along the shore between Duluth and the Apostle Islands. 4-6 tenths thick and very thick lake ice in Chequamegon Bay.
May 6-31:
- Open water.

Southern Lake Superior east of the Keweenaw Peninsula.
April 29-May 31:
- Open water.

Whitefish Bay.
April 29-May 5:
- 1-3 tenths thick lake ice in the northeastern section.
May 6-31:
- Open water.

From Whitefish Bay northwards to Michipicoten Bay.
April 29-May 1:
- Open water except 1-3 tenths thick lake ice in the eastern section.
May 2-31:
- Open water.

From Michipicoten Bay to the entrance to Nipigon Bay.
April 29-May 31:
- Open water.

Elsewhere in Lake Superior.
April 29-May 31:
- Open water to ice free.

Lake Michigan

Average air temperatures for April were near to below normal for Lake Michigan. Air temperatures are forecast to continue to be near normal to below for May.

Green Bay.
Northeastern Lake Michigan.
Elsewhere in Lake Michigan.
April 29-May 31:
- Open water to ice free.

Lake Huron and Georgian Bay

Average air temperatures for April were near normal for Lake Huron and Georgian Bay. Air temperatures are forecast to be near to below normal for May. 

North Channel.
April 29-May 3:
- Open water except 1-3 tenths thick lake ice in the western section. 4-6 tenths thick lake ice in the eastern section. 
May 4-6:
- Open water except 1-3 tenths thick lake ice in the eastern section.
May 7-31:
- Open water

St Mary’s River.
April 29-May 3:
- 1-3 tenths thick lake ice.
May 4-31:
- Open water.

South of Manitoulin Island westward to north-western Lake Huron
North-western Lake Huron near the Straits of Mackinac
From north-western Lake Huron to Saginaw Bay
Saginaw Bay
The southern and eastern shore of Lake Huron
Georgian Bay
Elsewhere in Lake Huron.
April 29-May 31:
- Open water to ice free

Lake Erie and Lake St. Clair

Average air temperatures for April were near normal for Lake Erie and Lake St. Clair. Air temperatures are forecast to be near normal May. 

Lake St Clair and the Western Basin.
The rest of Lake Erie.
April 29-May 31:
- Open water to ice free.

Lake Ontario

Average air temperatures for April were near normal for Lake Ontario. Air temperatures are forecast to be near normal for May. 

Northeastern Lake Ontario
Bay of Quinte.
St Lawrence River.
Elsewhere in Lake Ontario.
April 29-May 31:
- Open water to ice free.

END