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Weather Forecast Office

Great Lakes Ice Forecasts - Text

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Great Lakes Ice Outlook (CLEICELIO)

issued Monday Wednesday Friday

Freezing Degree Day Information

	CLEWRKLIO DEF 
TTAA00 KCLE 311715
 
FREEZING DEGREE DAY ACCUMULATIONS AT SELECTED STATIONS
COMPARED TO NORMAL CALCULATED ON Fri May 31:
 
LOCATION           DATE   NORMAL CURRENT
----------------------------------------
    
   DULUTH,   MN  MAY   30 1185 1380    
MARQUETTE,   MI  MAY   30 1033 1688    
SAU_S_MAR,   MI  MAY   30  574  907    
 GREENBAY,   WI  MAY   30  154   71    
MILWAUKEE,   WI  MAY   30    0    0    
  CHICAGO,   IL  MAY   30    0    0    
 MUSKEGON,   MI  MAY   30    0    0    
   ALPENA,   MI  MAY   30  147  421    
  DETROIT,   MI  MAY   30    0    0    
   TOLEDO,   OH  MAY   30    0    0    
CLEVELAND,   OH  MAY   30    0    0    
  BUFFALO,   NY  MAY   30    0    0

Canadian Daily Ice Forecast

Open water except 5 tenths thick lake ice near parts of the southern
shore, northeast of Ontonagon. 9 tenths thick lake ice near Duluth.
Consolidated very thick lake ice in bays along the northern shore.

Eastern Lake Superior.
Open water except 2 tenths thick lake ice in the southeastern
section.

Whitefish Bay.
3 tenths thick lake ice including 1 tenth very thick lake ice except
consolidated thick lake ice including 1 tenth very thick lake ice in
bays along the eastern shore.

Northern Lake Huron.
Open water except 1 tenth thick lake ice along parts of the northern
shore.

Southern Lake Huron.
Ice free.

North Channel.
7 tenths rotten thick lake ice including 1 tenth very thick lake ice
except consolidated rotten thick lake ice in the eastern and western
section.

Georgian Bay.
Open water except 4 tenths thick lake ice in the eastern section.
Consolidated rotten thick lake ice including 1 tenth very thick lake
ice along the northern shore.

Lake St. Clair
Western Lake Erie.
Ice free.

Eastern Lake Erie.
Open water except 9 tenths medium lake ice including 2 tenths thick
lake ice in the extreme northeastern section.

Lake Ontario.
Ice free.

Northern Lake Michigan.
Open water except 1 tenth thick lake ice east of Beaver Island.

Southern Lake Michigan.
Ice free.

Green Bay.
Open water.

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

End

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

National Ice Center 30 day ice outlook

Air temperature has been near normal from mid-March to mid-April. Air temperatures are forecast to be near normal from Mid-April to Mid-May.

Thunder Bay.
April 15-21:
- 7 to 8 tenths thick and very thick lake ice except consolidated thick and very thick lake ice in the northeastern section.
April 22-May 3:
- 1 to 3 tenths very thick lake ice except consolidated thick and very thick lake ice in the northeastern section.
May 4-10:
- Open water except 1 to 3 tenths very thick lake ice in the northeastern section.
May 11-15:
- Open water.

Nipigon and Black Bays.
April 15-28:
- Consolidated very thick lake ice.
April 29-May 6:
- 9 tenths very thick lake ice.
May 7-12:
- 1 to 3 tenths very thick lake ice
May 13-15:
- Open water.

From Grand Marais Minnesota to the entrance to Nipigon Bay.
April 15-25:
- Open water except patches of 1 to 3 tenths very thick lake ice near the shore.
April 26-May 15:
- Open water.

From Grand Marais to Duluth.
April 15-May 15:
- Open water.

Southern Lake Superior west of Keweenaw Peninsula.
April 15-21:
- Open water except 7 to 8 tenths thick lake ice along parts of the coast in the eastern section and near the Apostle islands.
- Consolidated thick lake ice in a few bays.
April 22-30:
- Open water except 4 to 6 tenths thick lake ice along parts of the Keeweenaw peninsula.
May 1-15:
- Open water.

Southern Lake Superior east of the Keweenaw Peninsula.
April 15-22:
- 1 to 3 tenths thick lake ice along parts of the southern shore.
April 23-May 15:
- Open water

Whitefish Bay.
April 15-18:
- 9 to 10 tenths thick lake ice except consolidated thick and very thick lake ice in the eastern and western sections.
April 19-25:
- 9 tenths thick and very thick lake ice.
April 26-30:
- 1 to 3 tenths very thick lake ice.
May 1-15:
- Open water.

From Whitefish Bay northwards to Michipicoten Bay.
April 15-21:
- Open water except 9 tenths medium and thick lake ice along the shore.
April 22-26:
- Open water except 1 to 3 tenths thick lake ice in the southern section along the shore.
April 27-May 15:
- Open water.

From Michipicoten Bay to the entrance to Nipigon Bay.
April 15-May 15:
- Open water.

Elsewhere in Lake Superior.
April 15-May 15:
- Open water.

Lake Michigan

Air temperatures have been near normal for mid-March to mid-April. Air temperatures are forecast to be near normal for mid-April to mid-May.

Green Bay.
April 15-20:
- 4 to 6 tenths thick lake ice except consolidated thick lake ice in the Bays de Noc.
April 21-24:
- Open water except 4 to 6 tenths thick lake ice in the Bays de Noc.
April 25-May 15:
- Open water.

Northeastern Lake Michigan.
April 15-22:
- 1 to 3 tenths thick lake ice in the northeastern section.
April 23-May 15:
- Open water.

Elsewhere in Lake Michigan.
April 15-May 15:
- Open water.

Lake Huron and Georgian Bay

Air temperatures have been near normal for mid-March to mid-April. Air temperatures will be near normal for mid-April to mid-May.

North Channel.
April 15-19:
- Consolidated thick and very thick lake ice.
April 20-27:
- 7 to 8 tenths thick lake ice except consolidated thick and very thick lake ice in the eastern and western section.
April 28-30:
- 4 to 6 tenths thick lake ice.
May 1-5:
- 1 to 3 tenths thick lake ice in the eastern and western sections.
May 6-15:
- Open water.

St Marys River.
April 15-20:
- 5 to 6 tenths thick lake ice
Apr 21-24:
- 1 to 3 tenths thick lake ice
April 25-May 15:
- Open water.

South of Manitoulin Island westward to north-western Lake Huron.
April 15-21:
- Open water except 1 to 3 tenths thick lake ice in parts of the western section.
April 22-May 15:
- Open water.

North-western Lake Huron near the Straits of Mackinac.
April 15-22:
- Open water except 1 to 3 tenths thick lake ice in the Straits of Mackinac.
April 23-30:
- Open water.

From north-western Lake Huron to Saginaw Bay.
April 15-May 15:
- Open water.

Saginaw Bay.
April 15-May 15:
- Open water.

The southern and eastern shore of Lake Huron.
April 15-21:
- Open water except 7 to 8 tenths medium and thick lake ice along the eastern shore near Wiarton.
April 22-May 15:
- Open water.

Georgian Bay.
April 15-21:
- Open water except 7 to 8 tenths medium and thick lake ice over the eastern section.
- Consolidated thick lake ice along the eastern and northern shores.
April 22-26:
- Open water except 7 to 8 tenths medium and thick lake ice in the eastern section and along parts of the shore.
April 27-May 2:
- Open water except 1 to 3 tenths thick lake ice along the shore and in the eastern section.
May 3-15:
- Open water.

Elsewhere in Lake Huron.
April 15-May 15:
- Open water.

Lake Erie and Lake St. Clair

Air temperatures have been below normal for mid-March to mid-April. Air temperatures will be near normal for mid-April to mid-March.

Lake St Clair and the Western Basin.
April 15-May 15:
- Ice free.

The rest of Lake Erie.
April 15-21:
- Open water except 9 to 10 tenths medium and thick lake ice in the extreme eastern section.
April 22-28:
- Open water except 4 to 6 tenths medium and thick lake ice in the extreme eastern section.
April 29-May 15:
- Open water.

Lake Ontario

Air temperatures have been below near normal for mid-March to mid-April. Air temperatures will be near normal for mid-April to mid-May.

Northeastern Lake Ontario.
April 15-23:
- Open water.
April 24-May15:
- Ice free.

Bay of Quinte.
April 15-May 15:
- Ice free.

St Lawrence River.
April 15-20:
- 1 to 3 tenths medium and thick lake ice.
April 21-May 15:
- Open water.

Elsewhere in Lake Ontario.
April 15-May 15:
- Ice free.

END

Canadian 30-day ice outlook