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whus73 kdtx 250903
mwwdtx
037
urgent - marine weather message
national weather service detroit/pontiac mi
503 am edt sat oct 25 2014
...increased winds and waves expected tonight and sunday...
.strong upper level wave of low pressure will dive into the great
lakes region today. the dynamic system will lead to a tight pressure
gradient over the northern great lakes with cold air possibly
building into the northern 1/2rd of lake huron. it is behind this
developing frontal boundary that conditions will become quite
unstable. these unstable conditions will lead to gale force
northwesterly winds across the northern 1/2 of lake huron tonight.
further south...although winds are not expected to reach gale
force...waves are expected to build up over southern lake huron
tonight...then slowly subside on sunday as high pressure builds in
from the west and the pressure gradient slowly loosens. elevated
wave heights will necessitate the issuance of a small craft advisory
for outer saginaw bay as well as the lake huron nearshore waters
from port austin to port sanilac. the extreme southern zone from
port sanilac to port huron will need to be monitored closely as it
is forecast to reach small craft advisory criteria for a brief time
on sunday. however given the brevity...uncertainty...and the fact
that conditions will not be met until sunday will hold off on
headlines with this issuance.
lhz361>363-252115-
/o.new.kdtx.gl.w.0018.141026t0000z-141026t1300z/
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-
503 am edt sat oct 25 2014
...gale warning in effect from 8 pm this evening to 9 am edt
sunday...
the national weather service in detroit/pontiac has issued a gale
warning...which is in effect from 8 pm this evening to 9 am edt
sunday.
* wind and waves: during the gale warning...expect sustained
winds up to 29 knots from the northwest with gusts up to 37
knots. the largest expected significant waves will be 9 feet
with a potential maximum wave height of 13 feet.
* timing: the maximum winds are expected around 5 am sunday with
the largest waves expected around 7 am sunday.
refer to the latest marine forecasts for greater detail.
precautionary/preparedness actions...
a gale warning means winds of 34 to 47 knots are imminent or
occurring. operating a vessel in gale conditions requires
experience and properly equipped vessels. it is highly
recommended that mariners without the proper experience seek safe
harbor prior to the onset of gale conditions.
&&
$$
whus73 kdtx 250903
mwwdtx
lhz442-252115-
/o.con.kdtx.sc.y.0039.141026t0400z-141026t2000z/
harbor beach to port sanilac mi-
503 am edt sat oct 25 2014
...small craft advisory remains in effect from midnight tonight
to 4 pm edt sunday...
* wind and waves: during the small craft advisory...expect
sustained winds up to 20 knots from the northwest with gusts
up to 25 knots. the largest expected significant waves will
be 5 feet with a potential maximum wave height of 7 feet.
* timing: the maximum winds are expected around 11 am sunday
with the largest waves expected around 10 am sunday.
refer to the latest marine forecasts for greater detail.
precautionary/preparedness actions...
a small craft advisory means that wind speeds of 21 to 33 knots
are expected to produce hazardous wave conditions to small craft.
inexperienced mariners...especially those operating smaller
vessels should avoid navigating in these conditions.
&&
$$

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