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FZUS81 KCLE 041925
ICELIO

GREAT LAKES ICE OUTLOOK
NATIONAL WEATHER SERVICE CLEVELAND OHIO
325 PM EDT FRI APR 4 2008

HIGH PRESSURE WILL SETTLE OVER THE SOUTHERN LAKES ON SATURDAY WHILE 
A FAST MOVING CLIPPER WILL MOVE ACROSS THE NORTHERN LAKES. A 
STATIONARY FRONT ASSOCIATED WITH THE CLIPPER WILL REMAIN ACROSS THE 
NORTHERN LAKES ON SUNDAY WITH HIGH PRESSURE REMAINING IN CONTROL 
ELSEWHERE. ON MONDAY LOW PRESSURE WILL DEVELOP ALONG THIS STATIONARY 
FRONT AND PUSH A COLD FRONT ACROSS ALL OF THE GREAT LAKES MONDAY 
AFTERNOON THROUGH MONDAY EVENING. HIGH PRESSURE WILL BRIEFLY RETURN 
ON TUESDAY ACROSS ALL THE LAKES HOWEVER ANOTHER AREA OF LOW PRESSURE 
WILL MOVE ACROSS THE WESTERN LAKES TUESDAY AFTERNOON AND ACROSS THE 
EASTERN LAKES TUESDAY NIGHT. THE LOW WILL SLOWLY MOVE INTO NORTHERN 
ONTARIO ON WEDNESDAY WITH HIGH PRESSURE RETURNING TO ALL THE LAKES 
WEDNESDAY AFTERNOON. 

WINDS TONIGHT WILL BE OUT OF THE SOUTHWEST ON LAKES SUPERIOR 
MICHIGAN AND HURON WHILE BECOMING LIGHT AND VARIABLE ON LAKE ERIE. 
WINDS SATURDAY AND SATURDAY NIGHT WILL BE OUT OF THE NORTHEAST ON 
LAKE SUPERIOR...OUT OF THE SOUTH ON LAKES MICHIGAN AND HURON...AND 
OUT OF THE NORTHEAST ON LAKE ERIE.  

TEMPERATURES ON SATURDAY WILL BE NEAR NORMAL ON ALL LAKES. FROM 
SUNDAY THROUGH WEDNESDAY TEMPERATURES ON THE NORTHERN LAKES WILL 
REMAIN NEAR NORMAL WHILE TEMPERATURES ACROSS THE REMAINING LAKES 
WILL CLIMB ABOVE NORMAL.

ICE GROWTH WILL BE SLOW AND WILL BE CONFINED TO THE NIGHT TIME HOURS 
ACROSS THE NORTHERN LAKES ONLY. ELSEWHERE MODERATE TO RAPID ICE 
DECAY WILL PREVAIL THROUGH NEXT WEEK. MODERATE ICE DECAY IS LIKELY 
ON THE NORTHERN LAKES DURING THE DAYTIME HOURS. 

THE COAST GUARD CUTTER MACKINAW REPORTED ON THURSDAY THAT WHILE 
UNDERWAY IN WHITEFISH BAY THERE WAS 100 PERCENT COVERAGE OF 14 TO 20 
INCH PLATE ICE FROM 0.7NM SOUTHEAST OF GROS CAP REEFS LIGHT TO 4.5NM 
NORTHWEST OF GROS CAP REEFS LIGHT. THERE WAS 6 TO 10 INCHES OF SNOW 
COVER ON THE ICE WITH AREAS OF HEAVY PRESSURIZED REFROZEN BRASH 3 TO 
6 FEET THICK. THE ESTABLISHED TRACK IS HOLDING AND FRACTURES WERE 
OBSERVED ON THE SHORE OF GROS CAP. FROM 4.5NM NORTHWEST OF GROS CAP 
REEFS LIGHT TO 8.5NM SOUTHEAST OF WHITEFISH POINT THERE WAS 80 
PERCENT COVERAGE OF 8 TO 16 INCH BROKEN PLATE ICE WITH 2 TO 4 FOOT 
THICK PANCAKE FLOES. THERE WAS OPEN WATER IN THE ESTABLISHED TRACK 
FROM 7.5NM NORTHWEST OF GROS CAP REEFS LIGHT TO THE NORTHERN ICE 
EDGE 8.5NM SOUTHEAST OF WHITEFISH POINT. THE MACKINAW ALSO REPORTED 
THAT THERE WERE MASSIVE PLATES OF ICE WHICH HAVE BROKEN FREE SOUTH 
OF WHITEFISH POINT AND THEY HAD DRIFTED NORTHEAST COLLAPSING 
WEDNESDAYS ESTABLISHED TRACK ABEAM OF ILE PARISIENNE. THEY WORKED 
THROUGH THE DAY TO RE-ESTABLISH TWO WAY TRACKS FROM GROS CAP TO THE 
ICE EDGE. 

THE COAST GUARD CUTTER KATMAI BAY REPORTED ON WEDNESDAY THAT WHILE 
UNDERWAY IN THE ST MARYS RIVER THERE WAS 20 PERCENT COVERAGE OF 6 TO 
12 INCH BROKEN PLATE ICE FROM SAULT HARBOR TO 6 MILE. THIS AREA WAS 
CLOSED TO SMALL CRAFT AND THE ICE EDGE WAS LOCATED AT LIGHT 88. FROM 
6 MILE TO 9 MILE THERE WAS 80 PERCENT COVERAGE OF 8 TO 14 INCH SNOW 
COVERED BROKEN PLATE ICE...TRAVEL WAS DIFFICULT. FROM 9 MILE TO MOON 
ISLAND THERE WAS 100 PERCENT COVERAGE OF 12 TO 20 INCH SNOW COVERED 
PLATE ICE...TRAVEL WAS DIFFICULT. FROM MOON ISLAND TO MUD LAKE 
JUNCTION BUOY THERE WAS 100 PERCENT COVERAGE OF 12 TO 20 INCH SNOW 
COVERED BROKEN PLATE ICE. TRAVEL WAS DIFFICULT. THE KATMAI BAY ALSO 
REPORTED ON THURSDAY THAT FROM LIME ISLAND TO MUD LAKE JUNCTION BUOY 
THERE WAS 90 PERCENT COVERAGE OF 8 TO 24 INCH BROKEN PLATE ICE. FROM 
MUD LAKE JUNCTION BUOY TO JOHNSON POINT THERE WAS 100 PERCENT 
COVERAGE OF 8 TO 18 INCH SNOW COVERED BROKEN PLATE ICE. THERE WAS 
HEAVY BRASH UP TO 3 FEET DEEP IN THE WINTER POINT AND JOHNSON POINT 
TURNS. FROM JOHNSON POINT TO 9 MILE THERE WAS 90 PERCENT COVERAGE OF 
6 TO 18 INCH SNOW COVERED BROKEN PLATE ICE. THERE WAS HEAVY BRASH IN 
THE STRIBLING POINT TURN. FROM 9 MILE TO SAWMILL POINT THERE WAS 90 
PERCENT COVERAGE OF 6 TO 20 INCH SNOW COVERED BROKEN PLATE ICE. 
THERE WAS HEAVY BRASH IN THE ROCK CUT. FROM SAWMILL POINT TO MUD 
LAKE JUNCTION BUOY THERE WAS 100 PERCENT COVERAGE OF 6 TO 18 INCH 
PLATE ICE. 

THE COAST GUARD CUTTER HOLLYHOCK REPORTED ON THURSDAY THAT WHILE 
UNDERWAY IN THE SOUTH CHANNEL IN THE STRAITS OF MACKINAC THERE WAS 
90 PERCENT COVERAGE OF 6 TO 18 INCH FAST SNOW COVERED PLATE ICE FROM 
1NM EAST OF THE MACKINAC BRIDGE TO 2NM WEST OF THE 14 FOOT SHOAL. 
THERE WERE ALSO 2 TO 3 FOOT WINDROWS. FROM 1NM WEST OF THE MACKINAC 
BRIDGE TO 3NM WEST OF WHITE SHOAL LIGHT THERE WAS 90 PERCENT 
COVERAGE OF 12 TO 24 INCH DRIFTING SNOW COVERED PLATE ICE WITH 2 TO 
3 FOOT WINDROWS. THERE WERE LARGE OPEN POOLS OF WATER.