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Small Craft Advisory


URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
348 AM EDT Wed Aug 21 2019

...Strong north-northwest winds over southern Lake Huron...

.A cold front will drop south across Lake Huron this afternoon before
pushing into Lake Erie tonight. The front will trigger a few
thunderstorms, mainly on southern Lake Huron. A few of these could
be strong. Strengthening north-northwest winds will develop within
the post frontal cold air advection tonight, especially on Lake
Huron. There is moderate to high probabilities that wind gusts
across Lake Huron will range between 25 and 30 knots tonight. This
will result in hazardous conditions for small craft on the nearshore
waters of Lake Huron. Strong high pressure will slowly expand into
the Great Lakes from the north Thursday and Friday, leading to a
gradual decrease in the winds and waves.

Any agitated cumulus may be able to produce waterspouts later
today into tonight across southern Lake Huron, Lake St. Clair, and
Lake Erie. Water temps are in the 70s /near 80 in the western
basin of Lake Erie/ and 850mb temps will fall to around 9 to 10C,
providing plenty of instability. Convective cloud depths
approaching 25 kft and relatively weak 850 mb winds both lend
additional support.

LHZ441>443-212000-
/O.NEW.KDTX.SC.Y.0047.190822T0000Z-190822T1600Z/
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
348 AM EDT Wed Aug 21 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO NOON
EDT THURSDAY...

The National Weather Service in Detroit/Pontiac has issued a
Small Craft Advisory which is in effect from 8 PM this evening to
noon EDT Thursday.

* WIND AND WAVES: During the Small Craft Advisory, expect
  sustained winds up to 18 knots from the north with gusts up
  to 23 knots. The largest expected significant waves will be 5
  feet with a potential maximum wave height of 7 feet.

* TIMING: The maximum winds are expected around 10 PM EDT
  Wednesday with the largest waves expected around 2 AM EDT
  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.

&&

$$

TF

U.S. Dept. of Commerce
NOAA National Weather Service
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Page last modified: June 2, 2009
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