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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 Mon May 31:
 
LOCATION           DATE   NORMAL CURRENT
----------------------------------------
    
   DULUTH,   MN  MAY   30  693    0    
MARQUETTE,   MI  MAY   29 1066  441    
SAU_S_MAR,   MI  MAY   30  567    0    
 GREENBAY,   WI  MAY   30  462    0    
MILWAUKEE,   WI  MAY   30    0    0    
  CHICAGO,   IL  MAY   29    0    0    
 MUSKEGON,   MI  MAY   29    0    0    
   ALPENA,   MI  MAY   30  121    0    
  DETROIT,   MI  MAY   30    0    0    
   TOLEDO,   OH  MAY   30    0    0    
CLEVELAND,   OH  MAY   30    0    0    
  BUFFALO,   NY  MAY   29    0    0    
 
 




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 Saturday 1 May 2021 for today tonight and Sunday.
The next scheduled forecasts will be issued at 12:00 p.m. Sunday.

Western Lake Superior.
Open water.

Eastern Lake Superior
Whitefish Bay
Lake Huron
North Channel
Georgian Bay
Lake St. Clair
Lake Erie
Lake Ontario.
Ice free.

Northern Lake Michigan
Southern Lake Michigan
Green Bay.
Ice free.

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


					
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FECN19 CWIS 301800 
THIRTY-DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED BY ENVIRONMENT CANADA ON 30 APRIL 2021 FOR MAY. 

THESE ARE THE LAST FORECASTS FOR THE SEASON

Lake Superior

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

Nipigon and Black Bays.
May 1-5:
- Open water.
May 6-31:
- Ice free.

Thunder Bay
From Grand Marais Minnesota to the entrance to Nipigon Bay
From Grand Marais to Duluth
Southern Lake Superior west of Keweenaw Peninsula
Southern Lake Superior east of the Keweenaw Peninsula
Whitefish Bay
From Whitefish Bay northwards to Michipicoten Bay
From Michipicoten Bay to the entrance to Nipigon Bay
Elsewhere in Lake Superior.
May 1-31:
- Ice free.

Lake Michigan

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

Green Bay
Northeastern Lake Michigan
Elsewhere in Lake Michigan.
May 1-31:
	- 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 be near normal for May. 

North Channel
St Mary’s River
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.
May 1-31:
	- 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 expected to be near normal for May. 

Lake St Clair and the Western Basin
The rest of Lake Erie.
May 1-31:
- 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.
May 1-31:
- Ice free.

 
 
 
 
 

 

 

Canadian 30-day ice outlook


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FECN19 CWIS 301800 
THIRTY-DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED BY ENVIRONMENT CANADA ON 30 APRIL 2021 FOR MAY. 

THESE ARE THE LAST FORECASTS FOR THE SEASON

Lake Superior

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

Nipigon and Black Bays.
May 1-5:
- Open water.
May 6-31:
- Ice free.

Thunder Bay
From Grand Marais Minnesota to the entrance to Nipigon Bay
From Grand Marais to Duluth
Southern Lake Superior west of Keweenaw Peninsula
Southern Lake Superior east of the Keweenaw Peninsula
Whitefish Bay
From Whitefish Bay northwards to Michipicoten Bay
From Michipicoten Bay to the entrance to Nipigon Bay
Elsewhere in Lake Superior.
May 1-31:
- Ice free.

Lake Michigan

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

Green Bay
Northeastern Lake Michigan
Elsewhere in Lake Michigan.
May 1-31:
	- 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 be near normal for May. 

North Channel
St Mary’s River
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.
May 1-31:
	- 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 expected to be near normal for May. 

Lake St Clair and the Western Basin
The rest of Lake Erie.
May 1-31:
- 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.
May 1-31:
- Ice free.