Great Lakes Forecast
Issued by NWS

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000
FZUS63 KDTX 191900
GLFSC

LAKE ST CLAIR FORECAST
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
300 PM EDT TUE AUG 19 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...A SLOW MOVING AND WEAKENING LOW PRESSURE SYSTEM...OF
29.60 INCHES...WILL DESCEND THROUGH THE GREAT LAKES BY THURSDAY. FOR
THE END OF THE WEEK AND WEEKEND...THERE IS NOT EXPECTED TO BE AN
ORGANIZED SURFACE HIGH...RATHER PERSISTENT TROUGHING.

LCZ460-200815-
LAKE ST CLAIR-
300 PM EDT TUE AUG 19 2014

...SEVERE THUNDERSTORM WATCH 467 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

.TONIGHT...SOUTH WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS THROUGH MIDNIGHT. PATCHY FOG AFTER MIDNIGHT. MOSTLY
CLOUDY THROUGH MIDNIGHT...BECOMING PARTLY CLOUDY OVERNIGHT. WAVES
2 FEET OR LESS.
.WEDNESDAY...SOUTHWEST WINDS 5 TO 10 KNOTS THROUGH EARLY AFTERNOON...
BECOMING LIGHT AND VARIABLE. A CHANCE OF SHOWERS AND THUNDERSTORMS
BY LATE MORNING. MOSTLY CLOUDY. WAVES 2 FEET OR LESS.
.WEDNESDAY NIGHT...LIGHT AND VARIABLE WINDS. PARTLY CLOUDY. WAVES
NEARLY CALM.
.THURSDAY...LIGHT AND VARIABLE WINDS. PARTLY SUNNY. WAVES NEARLY
CALM.
.THURSDAY NIGHT...SOUTHEAST WINDS 5 TO 10 KNOTS THROUGH MIDNIGHT...
BECOMING LIGHT AND VARIABLE...THEN BECOMING SOUTHEAST 5 TO 10 KNOTS
LATE. PARTLY CLOUDY. WAVES NEARLY CALM.
.FRIDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.SATURDAY...SOUTHEAST WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.
.SUNDAY...SOUTH WINDS 5 TO 10 KNOTS. A CHANCE OF SHOWERS AND
THUNDERSTORMS. PARTLY CLOUDY. WAVES 2 FEET OR LESS.

$$

MANN

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





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