754  
FZUS81 KCLE 262302  
ICELIO  
 
GREAT LAKES ICE OUTLOOK  
NATIONAL WEATHER SERVICE CLEVELAND OHIO  
602 PM EST WED FEB 26 2020  
 
ACTIVE WATCHES...WARNINGS...AND ADVISORIES ON THE GREAT LAKES CAN  
BE FOUND AT:  
 
HTTP://WWW.WEATHER.GOV/GREATLAKES/  
 
5 DAY ICE DISCUSSION...  
 
ICE ACROSS THE GREAT LAKES IS STILL WELL BELOW NORMAL AT THIS POINT, A  
TREND WE HAVE OBSERVED ALL WINTER. ALL GREAT LAKES HAVE EXPANSIVE AREAS OF  
OPEN WATER. AREAS OF FAST ICE WERE LOCATED IN THUNDER AND BLACK BAYS IN  
NORTHWESTERN LAKE SUPERIOR AND ALONG THE SOUTHWESTERN SHORES OF LAKE  
SUPERIOR. FOR LAKE MICHIGAN, EXPANSIVE AREAS OF FAST ICE ARE NOTED ACROSS  
MUCH OF GREEN BAY, LITTLE BAY DE NOC, AND BIG BAY DE NOC. FOR LAKE HURON,  
PORTIONS OF FAST ICE ARE OBSERVED ALONG THE NORTHERN SHORE OF THE GEORGIAN  
BAY, THE NORTH CHANNEL, AND SAGINAW BAY. ICE IS ALSO OBSERVED AROUND THE  
STRAITS OF MACKINAW AND ST. MARY'S RIVER.  
 
THE TEMPERATURE TREND CHANGES QUITE ABRUPTLY AFTER TODAY WITH A STRONG LOW  
PRESSURE MOVING NORTHWEST ACROSS THE LOWER GREAT LAKES, USHERING IN A MUCH  
COLDER AIRMASS FOR THURSDAY AND FRIDAY. THE COLDER AIRMASS WILL RESULT IN  
MODERATE ICE GROWTH ACROSS ALL GREAT LAKES THROUGH AT LEAST FRIDAY NIGHT  
WITH ICE GROWTH SLOWING ON SATURDAY. MORE SPECIFICALLY, ICE DEVELOPMENT IS  
EXPECTED ALONG THE NORTHERN AND SOUTHERN SHORES OF LAKE SUPERIOR, ALONG  
THE SHORES OF NORTHERN LAKE MICHIGAN (NORTH OF LINE FROM MANITOWOC, WI TO  
LUDINGTON, MI), ALONG ALL SHORES OF LAKE HURON, AND THE WESTERN BASIN OF  
LAKE ERIE. ALONG WITH THE ADDITIONAL ICE DEVELOPMENT, GALE-FORCE NORTHWEST  
AND WEST WINDS ARE EXPECTED TO DEVELOP ACROSS PORTIONS OF LAKE MICHIGAN,  
MOST OF LAKE HURON, AND ALL OF LAKE ERIE TONIGHT THROUGH THURSDAY NIGHT,  
ALL OF WHICH ARE NOTED BY GALE WARNINGS. THESE STRONG WINDS WILL CAUSE  
SOME MOVEMENT OF THE NEW ICE ACROSS THE OPEN WATERS OF NORTHERN LAKE  
MICHIGAN, LAKE HURON, AND LAKE ERIE.  
 
BY EARLY MARCH, TEMPERATURES INCREASE TO SLIGHTLY ABOVE NORMAL ACROSS ALL  
GREAT LAKES, RESULTING IN LONGER PERIODS OF ABOVE FREEZING TEMPERATURES.  
THIS SHOULD RESULT IN LITTLE CHANGE TO ICE COVER SATURDAY, SUNDAY, AND  
MONDAY.  
 
THE GREAT LAKES ICE ANALYSIS PRODUCTS CAN BE FOUND AT:  
 
HTTP://WWW.NATICE.NOAA.GOV/PRODUCTS/GREAT_LAKES.HTML  
 
AND  
 
HTTP://WWW.GLERL.NOAA.GOV/DATA/ICE/#CURRENTCONDITIONS  
 
MAX WIND (KNOTS) AT EACH SITE FOR THE 12 HOUR FCST PERIOD  
 
LOCATION TONIGHT THU THU NIGHT FRI FRI NIGHT  
WEST SUPERIOR 010/16 350/15 350/16 310/15 320/07  
MID SUPERIOR 010/20 350/24 350/23 330/19 340/14  
EAST SUPERIOR 360/23 340/26 350/25 330/20 350/15  
NORTH MICHIGAN 320/19 320/20 310/18 320/16 310/12  
SOUTH MICHIGAN 320/24 310/21 320/19 310/19 310/13  
NORTH HURON 310/30 310/34 310/32 320/25 330/17  
MID HURON 310/31 300/32 290/31 300/22 320/16  
SOUTH HURON 340/29 290/32 280/29 280/22 310/19  
WEST ERIE 280/33 280/33 280/28 290/23 290/15  
EAST ERIE 270/38 260/40 260/35 250/29 290/16  
CENTRAL ONTARIO 260/45 260/43 250/40 260/24 310/16  
 
A FULL GRAPHICAL FORECAST OF WIND ON THE GREAT LAKES CAN BE FOUND AT:  
HTTP://WWW.WEATHER.GOV/GREATLAKES/  
 
TEMPERATURE FORECASTS FOR SELECTED CITIES  
 
LOCATION 02/27 02/28 02/29 03/01 03/02 03/03  
DULUTH 4 20 3 23 9 30 18 35 24 36 23 37  
MARQUETTE 16 20 13 21 12 26 16 33 23 37 28 39  
GREENBAY 11 24 8 25 8 29 15 37 24 40 30 42  
MILWAUKEE 16 25 13 25 16 30 23 36 30 40 34 44  
CHICAGO 20 29 20 29 20 33 27 39 33 44 37 48  
MUSKEGON 21 25 20 26 20 29 21 36 27 40 34 43  
ALPENA 13 22 16 24 13 26 13 28 18 36 28 42  
DETROIT 22 28 19 29 18 31 17 35 24 41 35 50  
TOLEDO 21 27 20 28 17 29 18 34 24 44 37 53  
CLEVELAND 25 27 23 28 22 29 22 34 25 45 38 53  
BUFFALO 26 28 20 26 16 24 14 27 17 40 32 47  
 
A FULL GRAPHICAL FORECAST OF THE GREAT LAKES FORECAST TEMPERATURES  
CAN BE FOUND AT HTTP://WWW.WEATHER.GOV/GREATLAKES/  
 
FREEZING DEGREE DAY ACCUMULATIONS AT SELECTED STATIONS  
COMPARED TO NORMAL CALCULATED ON WED FEB 26:  
 
LOCATION DATE NORMAL CURRENT  
----------------------------------------  
 
DULUTH, MN FEB 25 1767 1540  
MARQUETTE, MI FEB 25 1491 1276  
SAU_S_MAR, MI FEB 24 1190 772  
GREENBAY, WI FEB 25 1134 659  
MILWAUKEE, WI FEB 25 638 156  
CHICAGO, IL FEB 25 505 105  
MUSKEGON, MI FEB 25 399 102  
ALPENA, MI FEB 25 916 466  
DETROIT, MI FEB 25 381 62  
TOLEDO, OH FEB 25 386 17  
CLEVELAND, OH FEB 25 196 0  
BUFFALO, NY FEB 25 505 92  
 
 
NORMAL TEMPS FOR SELECTED LOCATIONS AROUND THE  
GREAT LAKES FOR WED FEB 26  
 
LOCATION HIGH LOW  
----------------------------------------------  
 
DULUTH,MN 29 11  
MARQUETTE,MI 30 13  
GREENBAY,WI 35 17  
MILWAUKEE,WI 37 22  
CHICAGO,IL 41 24  
MUSKEGON,MI 37 23  
ALPENA,MI 34 14  
DETROIT,MI 40 23  
TOLEDO,OH 41 23  
CLEVELAND,OH 41 25  
BUFFALO,NY 37 22  
 

 
 
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