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2 products issued by NWS for: 12NM N Port Sanilac MI
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Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
340 PM EST WED DEC 13 2017

...ELEVATED WAVES INTO THURSDAY ...

.A LOW PRESSURE CLIPPER SYSTEM WILL CONTINUE TO PUSH SOUTHEAST ACROSS
MICHIGAN THROUGHOUT WEDNESDAY AFTERNOON AND EVENING, PRODUCING
PERSISTENT SNOWFALL ACROSS THE STATE AND ITS LAKES AND BAYS. THE
APPROACHING LOW WILL INCREASE THE PRESSURE GRADIENT OVER THE WATER,
WHICH WILL ALLOW WIND GUSTS TO PEAK BETWEEN 20 - 25 KNOTS THROUGH
THURSDAY MORNING. THE MAIN HAZARD WILL COME WITH A SHIFT IN WIND
DIRECTION FROM THE SOUTHEAST TO THE NORTHEAST TONIGHT, WHICH WILL
ALLOW WAVE HEIGHT TO PEAK BETWEEN 5 - 7 FT ALONG THE SHORE AND OPEN
WATERS THROUGH THURSDAY MORNING. SMALL CRAFT ADVISORIES ARE IN EFFECT
OVER THE NEAR SHORE WATERS TONIGHT INTO THURSDAY BEFORE WINDS BACK
TO THE NORTHWEST, ALLOWING WAVES TO RELAX ACROSS THE MICHIGAN SHORE.
THE NEXT SIGNIFICANT IMPACT WILL MOVE IN ON FRIDAY, WHERE MEAN WEST
TO NORTHWEST FLOW COMBINED WITH INSTABILITY WILL BRING THE THREAT OF
SNOW SQUALLS THROUGH THE MORNING AND AFTERNOON.

LHZ421-441>443-140915-
/O.CON.KDTX.SC.Y.0096.000000T0000Z-171214T1500Z/
OUTER SAGINAW BAY SW OF ALABASTER TO PORT AUSTIN MI TO INNER
SAGINAW BAY-PORT AUSTIN TO HARBOR BEACH MI-
HARBOR BEACH TO PORT SANILAC MI-PORT SANILAC TO PORT HURON MI-
340 PM EST WED DEC 13 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WIND AND WAVES: DURING THE SMALL CRAFT ADVISORY...EXPECT
  SUSTAINED WINDS UP TO 25 KNOTS FROM THE NORTH WITH GUSTS UP
  TO 26 KNOTS. THE LARGEST EXPECTED SIGNIFICANT WAVES WILL BE 7
  FEET WITH A POTENTIAL MAXIMUM WAVE HEIGHT OF 10 FEET.

* TIMING: THE MAXIMUM WINDS ARE EXPECTED AROUND 1 AM EST
  THURSDAY WITH THE LARGEST WAVES EXPECTED AROUND 2 AM EST
  THURSDAY.

REFER TO THE LATEST MARINE FORECASTS FOR GREATER DETAIL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

JVC



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
408 AM EST Wed Dec 13 2017

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-140930-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
408 AM EST Wed Dec 13 2017

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.DAY ONE...Today and Tonight

Small craft advisories are in effect for Lake Huron, including
Saginaw Bay. Refer to the latest marine forecast for details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Small craft advisories are in effect for Lake Huron into Thursday
morning.  Refer to the latest marine forecast for details.


.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

SF



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