Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 211433
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
933 AM EST SUN DEC 21 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...HIGH PRESSURE...AVERAGING 30.30 INCHES...WILL HOLD
OVER THE EASTERN GREAT LAKES THROUGH TONIGHT. AS THIS HIGH SHIFTS TO
NEAR THE NEW ENGLAND STATES EARLY IN THE WEEK...LOW PRESSURE WILL
DEVELOP OVER THE MID MISSISSIPPI VALLEY MONDAY AND LIFT INTO THE
WESTERN GREAT LAKES TUESDAY. A SECONDARY LOW WILL THEN FORM OVER THE
LOWER MISSISSIPPI VALLEY TUESDAY AND DEEPEN AS IT TRACKS NORTH INTO
THE REGION WEDNESDAY.

LCZ460-212115-
LAKE ST CLAIR-
933 AM EST SUN DEC 21 2014

.REST OF TODAY...LIGHT AND VARIABLE WINDS...BECOMING SOUTH 5 TO
10 KNOTS BY AFTERNOON. MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS. PARTLY CLOUDY. WAVES
2 FEET OR LESS.
.MONDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. MOSTLY CLOUDY. WAVES 2 FEET
OR LESS.
.MONDAY NIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS...INCREASING TO 10 TO
15 KNOTS BY LATE EVENING. CLOUDY WITH A CHANCE OF LIGHT SHOWERS.
WAVES 2 FEET OR LESS.
.TUESDAY...SOUTHEAST WINDS 10 TO 15 KNOTS. LIGHT SHOWERS LIKELY...
THEN SHOWERS BY EVENING. WAVES 2 FEET OR LESS.
.WEDNESDAY...SOUTHWEST WINDS 10 TO 15 KNOTS. SHOWERS AND A CHANCE OF
LIGHT SNOW SHOWERS. WAVES 1 TO 3 FEET.
.THURSDAY...SOUTHWEST WINDS 15 TO 20 KNOTS. MOSTLY CLOUDY. SCATTERED
LIGHT SNOW SHOWERS. WAVES 1 TO 3 FEET.

$$

SC

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


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