Great Lakes Forecast
Issued by NWS

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FZUS63 KDTX 210802
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
401 AM EDT MON APR 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...LOW PRESSURE...AVERAGING 29.90 INCHES...WILL DEVELOP
OVER THE UPPER MIDWEST TONIGHT AND MOVE ACROSS LOWER MICHIGAN MONDAY
EVENING...DEEPENING TO 29.60 INCHES. THE LOW WILL DEEPEN FURTHER AS
IT APPROACHES NEW ENGLAND TUESDAY. MEANWHILE HIGH
PRESSURE...AVERAGING 30.10 INCHES...WILL BUILD INTO THE GREAT LAKES
FROM THE WEST TUESDAY BECOMING CENTERED OVER LAKE HURON ON
WEDNESDAY. THE HIGH HOLD OVER THE REGION UNTIL THE NEXT LOW PRESSURE
SYSTEM MOVES IN AT THE END OF THE WEEK.

LCZ460-212000-
LAKE ST CLAIR-
401 AM EDT MON APR 21 2014

.TODAY...LIGHT AND VARIABLE WINDS...BECOMING SOUTHWEST 5 TO 10 KNOTS
BY AFTERNOON. A CHANCE OF LIGHT SHOWERS AND A SLIGHT CHANCE OF
THUNDERSTORMS BY MID AFTERNOON. PARTLY SUNNY. WAVES 2 FEET OR LESS.
.TONIGHT...SOUTHWEST WINDS 5 TO 10 KNOTS IN THE EVENING...BECOMING
LIGHT AND VARIABLE...THEN BECOMING NORTH 10 TO 15 KNOTS LATE. MOSTLY
CLOUDY WITH LIGHT SHOWERS LIKELY AND A CHANCE OF THUNDERSTORMS.
WAVES 2 FEET OR LESS.
.TUESDAY...NORTHWEST WINDS 10 TO 15 KNOTS...INCREASING TO 15 TO
20 KNOTS BY MID AFTERNOON. PARTLY SUNNY. WAVES 1 TO 3 FEET.
.TUESDAY NIGHT...NORTHWEST WINDS 10 TO 15 KNOTS. MOSTLY CLEAR. WAVES
2 FEET OR LESS.
.WEDNESDAY...NORTH WINDS 10 TO 15 KNOTS...DIMINISHING TO 5 TO
10 KNOTS BY MID AFTERNOON...THEN VEERING TO THE NORTHEAST THROUGH
MIDNIGHT. MOSTLY CLEAR. WAVES 2 FEET OR LESS.
.THURSDAY...SOUTHEAST WINDS 10 TO 15 KNOTS. LIGHT SHOWERS LIKELY.
PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.FRIDAY...WEST WINDS 15 TO 20 KNOTS. LIGHT SHOWERS LIKELY. PARTLY
CLOUDY. WAVES 2 FEET OR LESS.

$$

DRK

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






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