Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 231439
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
939 AM EST TUE DEC 23 2014

WAVES ARE THE SIGNIFICANT WAVE HEIGHT - THE AVERAGE OF THE HIGHEST
1/3 OF THE WAVE SPECTRUM. OCCASIONAL WAVE HEIGHT IS THE AVERAGE OF
THE HIGHEST 1/10 OF THE WAVE SPECTRUM.

.SYNOPSIS...LOW PRESSURE...29.50 INCHES...OVER SOUTHWEST WISCONSIN THIS
MORNING WILL MOVE TO NORTHERN WISCONSIN BY THIS EVENING...
WEAKENING IN THE PROCESS. A SECONDARY LOW PRESSURE SYSTEM IS
FORECAST TO DEVELOP OVER THE GULF COAST AND LIFT ALMOST DUE NORTH
TO LAKE HURON BY WEDNESDAY NIGHT. THIS SYSTEM IS FORECAST TO
RAPIDLY INTENSIFY AS IT TRACKS THROUGH THE GREAT LAKES
REGION...LOWERING TO 29.90 INCHES AS IT MOVES INTO NORTHEASTERN
ONTARIO THURSDAY MORNING.

LCZ460-232115-
LAKE ST CLAIR-
939 AM EST TUE DEC 23 2014

...GALE WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH THURSDAY
MORNING...

.REST OF TODAY...SOUTHEAST WINDS 10 TO 15 KNOTS...BECOMING SOUTH
5 TO 10 KNOTS BY AFTERNOON. A CHANCE OF LIGHT RAIN SHOWERS. WAVES
2 FEET OR LESS.
.TONIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS IN THE EVENING...BECOMING
LIGHT AND VARIABLE OVERNIGHT. CLOUDY. A CHANCE OF LIGHT RAIN SHOWERS
IN THE EVENING...THEN LIGHT RAIN SHOWERS LIKELY AFTER MIDNIGHT.
WAVES 2 FEET OR LESS.
.WEDNESDAY...NORTHEAST WINDS 5 TO 10 KNOTS...BECOMING SOUTHEAST 10 TO
15 KNOTS LATE IN THE MORNING...THEN INCREASING TO 15 TO 20 KNOTS IN
THE AFTERNOON...BECOMING SOUTH 20 TO 25 KNOTS LATE. LIGHT RAIN
EARLY...THEN LIGHT RAIN AND A CHANCE OF THUNDERSTORMS. WAVES 1 TO 3
FEET.
.WEDNESDAY NIGHT...SOUTHWEST WINDS 20 TO 25 KNOTS. GUSTS TO 35 KNOTS
GALES. CLOUDY. LIGHT RAIN SHOWERS LIKELY MAINLY BEFORE MIDNIGHT.
LIGHT SNOW SHOWERS LIKELY BY LATE EVENING. WAVES 2 TO 4 FEET...
SUBSIDING TO 1 TO 3 FEET AFTER MIDNIGHT.
.THURSDAY...WEST WINDS 15 TO 20 KNOTS...BECOMING SOUTHWEST 10 TO
15 KNOTS BY EVENING. MOSTLY CLOUDY...BECOMING PARTLY CLOUDY. WAVES
1 TO 3 FEET.
.FRIDAY...SOUTH WINDS 10 TO 15 KNOTS. PARTLY CLOUDY. A CHANCE OF
LIGHT RAIN AND SNOW SHOWERS. WAVES 2 FEET OR LESS.
.SATURDAY...WEST WINDS 10 TO 15 KNOTS. MOSTLY CLOUDY WITH A CHANCE
OF LIGHT RAIN AND SNOW SHOWERS. WAVES 2 FEET OR LESS.

$$

SC

GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT
WEATHER.GOV/GREATLAKES (ALL LOWER CASE)



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