whus73 kapx 220743
mwwapx

lhz347-348-221200-
/o.con.kapx.sc.y.0064.000000t0000z-190822t1200z/
5nm east of mackinac bridge to presque isle light mi including
bois blanc island-
presque isle light to sturgeon pt mi including thunder bay
national marine sanctuary-
343 am edt thu aug 22 2019

...small craft advisory remains in effect until 8 am edt this
morning...

a small craft advisory remains in effect until 8 am edt this
morning. 

* please see the latest marine forecasts for more detailed 
  information. 

precautionary/preparedness actions 

inexperienced mariners...especially those operating smaller
vessels should avoid navigating in these conditions.

$$

whus73 kdtx 220758
mwwdtx
207 

urgent - marine weather message
national weather service detroit/pontiac mi
358 am edt thu aug 22 2019

...elevated waves continue this morning over southern lake 
huron...

.canadian high pressure will expand into the northern great lakes 
over the next couple days before departing to eastern canada over 
the weekend. this system will influence the region right through the 
end of the weekend. there is an ongoing push of seasonally cool air 
across the lakes as this high builds in. this is currently 
supporting gusty northerly winds across southern lake huron. the 
winds and waves will gradually decrease during the course of the day 
and into tonight as the gradient slowly relaxes. light to modest 
northerly winds will however persist across the the lakes through 
the day friday. persistent cold air advection across the lakes today 
into friday will promote enough over lake instability to support a 
chance for waterspouts.

lhz441>443-221600-
/o.con.kdtx.sc.y.0047.000000t0000z-190822t1600z/
port austin to harbor beach mi-harbor beach to port sanilac mi-
port sanilac to port huron mi-
358 am edt thu aug 22 2019

...small craft advisory remains in effect until noon edt today...

* wind and waves: during the small craft advisory, expect
  sustained winds up to 15 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 3 am edt 
  thursday with the largest waves expected around 3 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.

&&

$$