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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 Sun May 31:
 
LOCATION           DATE   NORMAL CURRENT
----------------------------------------
    
   DULUTH,   MN  MAY   30 1197  930    
MARQUETTE,   MI  MAY   30 1046  956    
SAU_S_MAR,   MI  MAY   30  585   75    
 GREENBAY,   WI  MAY   30  161    0    
MILWAUKEE,   WI  MAY   30    0    0    
  CHICAGO,   IL  MAY   30    0    0    
 MUSKEGON,   MI  MAY   30    0    0    
   ALPENA,   MI  MAY   30  156    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    
 
 




                         Canadian Daily Ice Forecast 


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FICN19 CWIS 301545
Ice forecasts for the Great Lakes issued by Environment Canada at
12:00 p.m. EDT Thursday 30 April 2020 for today tonight and Friday.
The next scheduled forecasts will be issued at 12:00 p.m. Friday.

Western Lake Superior.
Open water except consolidated very thick lake ice in Black Bay and
Nipigon Bay and the eastern section of Thunder Bay.

Eastern Lake Superior
Whitefish Bay
North Channel
Northern Lake Huron
Georgian Bay.
Open water.

Southern Lake Huron
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 151800 
THIRTY DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED FOR MID-APRIL TO MID-MAY BY ENVIRONMENT CANADA ON 15 APRIL 2020 FOR APRIL. 

THESE ARE THE LAST FORECASTS FOR THE SEASON.  

Lake Superior

Average air temperatures were near normal across Lake Superior from mid-March to mid-April. Air temperatures are forecast to be above normal from mid-April to mid-May.

Thunder Bay.	
April 15-20:
	- Open water except 1-3 tenths rotten very thick lake ice in the northeastern section.
April 21-May 15:
	- Open water to ice free.

Nipigon and Black Bays.
April 15-18:
	- Consolidated rotten very thick rotten lake ice.
April 19-24:
	- 9 tenths very thick rotten lake ice.
April 25 – May 15:
	- Open water to ice free.
	

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
From Whitefish Bay northwards to Michipicoten Bay
From Michipicoten Bay to the entrance to Nipigon Bay
Elsewhere in Lake Superior.
April 15 – May 15:
	- Open water.

Whitefish Bay.
April 15-17:
	- Open water except 1-3 tenths thick lake ice.
April 18 – May 15:
	- Open water.

Lake Michigan

Average air temperatures from mid-March to mid-April were near normal. Air temperatures are forecast to be near above normal from mid-April to mid-May.

Green Bay.
April 15-17:
	- Open water except 7 tenths of rotten thick lake ice in the northern section of the bays de Noc.
April 18 - May 15:
	- Open water.

Northeastern Lake Michigan
Elsewhere in Lake Michigan.
April 15 – May 15:
	- Open water to ice free.

Lake Huron and Georgian Bay

Average air temperatures were near normal from mid-March to mid-April.  Air temperatures are forecast be near normal for mid-April to mid-May 

North Channel.
April 15-19:
	- Areas of 4-6 tenths rotten thick lake ice in the eastern and western sections.
April 20 – May 15:
	- Open water.

St Mary’s River.
April 15-18:
	- Patches of 4-6 tenths rotten thick lake ice.
April 19 – May 15:
	- Open water.

South of Manitoulin Island westward to north-western Lake Huron.
April 15 – May 15:
	- Open water.

From north-western Lake Huron to Saginaw Bay
Saginaw Bay
The southern and eastern shore of Lake Huron
Elsewhere in Lake Huron.
April 15 – May 15:
	- Open water to ice free.

Georgian Bay.	
April 15 – May 15:
	- Open water.

Lake Erie and Lake St. Clair

Average air temperatures were above normal from mid-March to mid-April. Air temperatures are forecast to be near normal from mid-April to mid-May.

Lake St Clair and the Western Basin
The rest of Lake Erie.
April 15 – May 15:
	- Ice free.

Lake Ontario

Average air temperatures were near normal from mid-March to mid-April. Air temperatures are forecast to be near normal for the mid-April to mid-May. 

Northeastern Lake Ontario
Bay of Quinte
St Lawrence River
Elsewhere in Lake Ontario.
April 15 – May 15:
	- Open water to ice free.


 
 
 
 
 

 

 

Canadian 30-day ice outlook


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FECN19 CWIS 151800 
THIRTY DAY ICE OUTLOOK FOR THE GREAT LAKES ISSUED FOR MID-APRIL TO MID-MAY BY ENVIRONMENT CANADA ON 15 APRIL 2020 FOR APRIL. 

THESE ARE THE LAST FORECASTS FOR THE SEASON.  

Lake Superior

Average air temperatures were near normal across Lake Superior from mid-March to mid-April. Air temperatures are forecast to be above normal from mid-April to mid-May.

Thunder Bay.	
April 15-20:
	- Open water except 1-3 tenths rotten very thick lake ice in the northeastern section.
April 21-May 15:
	- Open water to ice free.

Nipigon and Black Bays.
April 15-18:
	- Consolidated rotten very thick rotten lake ice.
April 19-24:
	- 9 tenths very thick rotten lake ice.
April 25 – May 15:
	- Open water to ice free.
	

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
From Whitefish Bay northwards to Michipicoten Bay
From Michipicoten Bay to the entrance to Nipigon Bay
Elsewhere in Lake Superior.
April 15 – May 15:
	- Open water.

Whitefish Bay.
April 15-17:
	- Open water except 1-3 tenths thick lake ice.
April 18 – May 15:
	- Open water.

Lake Michigan

Average air temperatures from mid-March to mid-April were near normal. Air temperatures are forecast to be near above normal from mid-April to mid-May.

Green Bay.
April 15-17:
	- Open water except 7 tenths of rotten thick lake ice in the northern section of the bays de Noc.
April 18 - May 15:
	- Open water.

Northeastern Lake Michigan
Elsewhere in Lake Michigan.
April 15 – May 15:
	- Open water to ice free.

Lake Huron and Georgian Bay

Average air temperatures were near normal from mid-March to mid-April.  Air temperatures are forecast be near normal for mid-April to mid-May 

North Channel.
April 15-19:
	- Areas of 4-6 tenths rotten thick lake ice in the eastern and western sections.
April 20 – May 15:
	- Open water.

St Mary’s River.
April 15-18:
	- Patches of 4-6 tenths rotten thick lake ice.
April 19 – May 15:
	- Open water.

South of Manitoulin Island westward to north-western Lake Huron.
April 15 – May 15:
	- Open water.

From north-western Lake Huron to Saginaw Bay
Saginaw Bay
The southern and eastern shore of Lake Huron
Elsewhere in Lake Huron.
April 15 – May 15:
	- Open water to ice free.

Georgian Bay.	
April 15 – May 15:
	- Open water.

Lake Erie and Lake St. Clair

Average air temperatures were above normal from mid-March to mid-April. Air temperatures are forecast to be near normal from mid-April to mid-May.

Lake St Clair and the Western Basin
The rest of Lake Erie.
April 15 – May 15:
	- Ice free.

Lake Ontario

Average air temperatures were near normal from mid-March to mid-April. Air temperatures are forecast to be near normal for the mid-April to mid-May. 

Northeastern Lake Ontario
Bay of Quinte
St Lawrence River
Elsewhere in Lake Ontario.
April 15 – May 15:
	- Open water to ice free.