Small Craft Advisory 35, NWS Green Bay, WI

399 
WHUS73 KGRB 271436
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
936 AM CDT Fri Apr 27 2018

LMZ521-522-541>543-272245-
/O.CON.KGRB.SC.Y.0035.180428T0300Z-180428T1800Z/
Green Bay south of line from  Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from  Oconto WI to Little Sturgeon Bay WI-
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
936 AM CDT Fri Apr 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 1 PM CDT SATURDAY...

* WINDS...North increasing to 15 to 25 kts late this evening
  through Saturday morning. 

* WAVES...Waves building to 3 to 5 feet tonight through Saturday 
  morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

320 
WHUS73 KGRB 271953
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
253 PM CDT Fri Apr 27 2018

LMZ521-522-541>543-280400-
/O.CON.KGRB.SC.Y.0035.180428T0300Z-180428T1800Z/
Green Bay south of line from  Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from  Oconto WI to Little Sturgeon Bay WI-
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
253 PM CDT Fri Apr 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 1 PM CDT SATURDAY...

* WINDS...North increasing to 15 to 25 kts late this evening 
  through Saturday morning. 

* WAVES...Waves building to 3 to 5 feet tonight through Saturday 
  morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

128 
WHUS73 KGRB 280151
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
851 PM CDT Fri Apr 27 2018

LMZ521-522-541>543-281000-
/O.CON.KGRB.SC.Y.0035.180428T0300Z-180428T1800Z/
Green Bay south of line from  Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from  Oconto WI to Little Sturgeon Bay WI-
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
851 PM CDT Fri Apr 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT
SATURDAY...

* WINDS...North increasing to 15 to 25 kts late this evening 
  through Saturday morning. 

* WAVES...3 to 5 feet tonight through Saturday morning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

297 
WHUS73 KGRB 280927
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
427 AM CDT Sat Apr 28 2018

LMZ541>543-281730-
/O.EXT.KGRB.SC.Y.0035.000000T0000Z-180428T2100Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
427 AM CDT Sat Apr 28 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON...

* WINDS...North 10 to 20 kts with occasional gusts over 25 kts.
 
* WAVES...4 to 6 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

LMZ521-522-281730-
/O.CON.KGRB.SC.Y.0035.000000T0000Z-180428T1800Z/
Green Bay south of line from  Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from  Oconto WI to Little Sturgeon Bay WI-
427 AM CDT Sat Apr 28 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...

* WINDS...North 10 to 20 kts with occasional gusts over 25 kts
  through midday. 
 
* WAVES...2 to 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$
TSK

875 
WHUS73 KGRB 281455
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
955 AM CDT Sat Apr 28 2018

LMZ521-522-281800-
/O.CON.KGRB.SC.Y.0035.000000T0000Z-180428T1800Z/
Green Bay south of line from  Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from  Oconto WI to Little Sturgeon Bay WI-
955 AM CDT Sat Apr 28 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...

* WINDS...North 10 to 20 kts. Gusts to 25 kts through around
  midday.

* WAVES...2 to 4 feet on ice free areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

LMZ541>543-282100-
/O.CON.KGRB.SC.Y.0035.000000T0000Z-180428T2100Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
955 AM CDT Sat Apr 28 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON...

* WINDS...North 10 to 20 kts with gusts to 25 kts.

* WAVES...3 to 5 feet subsiding to 1 to 3 ft late in the
  afternoon. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds over 20 knots or
waves greater than 4 feet are expected to produce hazardous
conditions to small craft.  Inexperienced mariners, especially
those operating smaller vessels should avoid navigating in these
conditions.

&&

$$

BERSCH

737 
WHUS73 KGRB 282040
MWWGRB

URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
340 PM CDT Sat Apr 28 2018

LMZ541>543-282145-
/O.CAN.KGRB.SC.Y.0035.000000T0000Z-180428T2100Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
340 PM CDT Sat Apr 28 2018

...SMALL CRAFT ADVISORY IS CANCELLED...

The National Weather Service in Green Bay has cancelled the Small
Craft Advisory. 



$$

Area Forecast Discussion
National Weather Service Green Bay WI
304 AM CDT Fri Apr 27 2018

Forecast discussion for routine morning forecast issuance

.SHORT TERM...Today...Tonight...and Saturday
Issued at 304 AM CDT Fri Apr 27 2018

The first band of rain, mixed with a little snow over Door County,
moved offshore overnight. Otherwise, skies were clear to partly
cloudy early this morning with the clouds and precipitation across
northern Minnesota racing southeast towards the area. Temperatures
at 3 am ranged from the middle to upper 20s across the north to
the middle 30s to around 40 south.

For today, a 500mb trough is expected to swing across the
western Great Lakes region. A strong upper level disturbance
moving along the mean flow is expected to drop southeast across
west central into southeast Wisconsin. The combination of cold
air aloft and the upper level disturbance will trigger showers
and isolated afternoon thunderstorms. Precipitation type may
be an issue for much of the morning across the far north.

Complex forecast this morning across the north. Temperatures are
well below freezing this morning. However, the compact system was
drawing warm air into the region, along with the strong April
sunshine should allow temperatures to warm well above freezing
later this morning. However, steep mid level lapse rates and
evaporative cooling, combined with intense precipitation rates
could allow for a few inches of snow to fall across the far north,
mainly across Oneida and Vilas counties east into Forest County.
Current forecast has around an inch for Vilas County with less
than an inch for Oneida and Forest Counties. If the convective
showers could move over the same area for a period of time, would
not be surprised if there were localized amounts of 2 to 3 inches
due to the intense precipitation rates. Over the remainder of the
region, isolated thunderstorms are possible generally west of a
Manitowoc to Crandon to Manitowish Waters line. Gusty winds and
small hail will be possible with the showers and storms due to the
low wet bulb zero heights and precipitation rates. Models did
show an inverted v signature to support the gusty winds. The risk
of thunder should end around sunset. Any lingering showers should
end during the evening.

High pressure will build into the region later tonight with
clouds on the decrease. The high pressure system will bring sunny
skies on Saturday with very low relative humidity readings during
the afternoon. Trended toward the warmer MAV guidance due to the
sunny skies and low relative humidity readings which should allow
for the warmer temperatures.

.LONG TERM...Saturday Night Through Thursday
Issued at 304 AM CDT Fri Apr 27 2018

The latest medium range models suggest this part of the forecast
will start out quiet, then turn more active for the middle of next
week.  A general model blend will suffice.

Saturday night through Sunday night...High pressure will be centered
across the region for Saturday night and Sunday.  With ample dry air
present, should see mostly clear conditions through the period.  As
the high shifts to the Appalachians on Sunday night, southwest flow
will increase aloft and moisture will start to invade the region
late.  Will likely see some increasing clouds, but precip chances
should hold off until later.  Temps returning to the low 60s away
from Lake Michigan on Sunday.

Rest of the forecast...Warm advection will crank into a higher gear
on Monday as a cold front moves across the north-central Plains.  In
addition to the warm advection, a weak shortwave could bring a few
showers to the region on Monday.  The front will then move across
the area on late Tue afternoon into Tuesday night.  Though upper
dynamics are not impressive, will have some instability present
which could lead to a few thunderstorms.  This front will stall
nearby the area on Wednesday and possibly into Thursday.  Periods of
showers and storms will be possible along the front, especially
during the Wednesday night and Thursday period, though its too early
to assess the severe threat. Temps could be quite warm on Monday and
Tuesday, and raised highs several degrees with coordination from
surrounding offices.  Temps do fall back behind the front for late
in the week.
&&

.AVIATION...for 06Z TAF Issuance
Issued at 1042 PM CDT Thu Apr 26 2018

A cold front will continue bringing clouds and some showers right
around TAF issuance time. However clearing skies are expected
behind the front after it clears. A period of MVFR cigs is
possible in the far north behind the front later tonight. A
clipper system will bring clouds and some light precipitation
Friday. The precipitation could begin as snow north of Rhinelander
with rain elsewhere. Flight conditions will generally be MVFR,
with local IFR possible. The precipitation will end Friday
evening, possibly as rain mixed with snow.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM.....Eckberg
LONG TERM......MPC
AVIATION.......Kurimski

Hazardous Weather Outlook
National Weather Service Green Bay WI
311 AM CDT Fri Apr 27 2018

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-280815-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
311 AM CDT Fri Apr 27 2018

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Today and Tonight

Snow accumulations around an inch or less is expected across
north central Wisconsin this morning. The snow could make for a
few slick roads and sidewalk before it turns to rain by midday.

There is a chance of thunderstorms across portions of central,
north-central and east-central Wisconsin this afternoon. Severe
storms are not expected, but some small hail and brief gusty winds
are possible.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Most rivers across the area are approaching crest or have crested
due to runoff from the recent snow melt. Minor flooding is occurring
on the Wolf, Little Wolf, Embarrass and Wisconsin Rivers. Anyone
with river interests should pay close attention to water levels
and the latest hydrologic forecasts. Boaters should also exercise
caution due to the fast flows on area rivers.

Low relative humidity is expected over the weekend, and may
result in elevated fire danger in grasses and other fine fuels.

There is a chance of thunderstorms at times from Tuesday afternoon
through Wednesday night. It is too early to determine if any of
these storms could become severe.

.SPOTTER INFORMATION STATEMENT...

Spotters are requested to forward snowfall measurements and any
occurrences of small hail to the National Weather Service in
Green Bay.

LMZ521-522-541>543-280815-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
311 AM CDT Fri Apr 27 2018

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Today and Tonight

Gusty north winds and building waves will lead to hazardous
conditions for small craft on the Bay and Lake later tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Hazardous conditions for small craft will continue through
early afternoon on Saturday.

Hazardous conditions for small craft are possible on Lake Michigan
early next week due to persistent south winds and building waves.
Thunderstorms may also pose a hazard to mariners Tuesday afternoon
and Tuesday night.

Eckberg/MPC