Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Boyne City, MI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:26AMSunset 7:59PM Saturday March 25, 2017 11:42 AM EDT (15:42 UTC) Moonrise 5:23AMMoonset 4:19PM Illumination 4% Phase: Waning Crescent; Moon at 28 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ342 Norwood Mi To 5nm West Of Mackinac Bridge Including Little Traverse Bay- 1029 Am Edt Sat Mar 25 2017
.small craft advisory in effect through late tonight...
Today..East wind 10 to 15 knots with gusts to around 25 knots. Partly Sunny. Waves 2 feet or less.
Tonight..East wind 10 to 20 knots with gusts to around 25 knots. Rain and slight chance of freezing rain. Waves 2 feet or less.
Sunday..East wind 15 to 20 knots with gusts to around 25 knots. Rain. Waves 2 feet or less.
Sunday night..Northeast wind 10 to 15 knots with gusts to around 20 knots. Chance of drizzle. Waves 2 feet or less. SEe the open lakes forecast for days 3 through 5.
LMZ342 Expires:201703252230;;059321 FZUS53 KAPX 251429 NSHAPX NEARSHORE MARINE FORECAST NATIONAL WEATHER SERVICE GAYLORD MI 1029 AM EDT SAT MAR 25 2017 FOR WATERS WITHIN FIVE NAUTICAL MILES OF SHORE ON LAKES HURON... MICHIGAN AND SUPERIOR LMZ342-252230-

7 Day Forecast for Marine Location Near Boyne City, MI
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location: 45.21, -85.02     debug


Area Discussion for - Gaylord, MI
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Fxus63 kapx 251103 cca
afdapx
area forecast discussion... Corrected
national weather service gaylord mi
703 am edt Sat mar 25 2017

Near term (today through tonight)
issued at 330 am edt Sat mar 25 2017

Active weather continues with more wintry mixed precip...

high impact weather potential... Ice accumulation tonight into
Sunday across eastern upper michigan and tip of the mitt.

Pattern synopsis/forecast... Split flow pattern remains across the
conus with the slow moving stacked/occluded low pressure system
over oklahoma, and warm front arcing up through the midwest and
across far SE lower michigan between detroit and toledo. System
has become reinvigorated through the course of Friday... Ingesting
gulf moisture and producing some rather active weather up through
the mississippi river valley.

Meanwhile, northern stream rides across the northern high plains
then through the northern lakes region with a nice upper jet core
stretching from lake superior eastward through quebec and mid
level confluent axis sitting right across northern lower michigan.

Persistent deformation along the tight thermal gradient that sits
across lower michigan... And aided by entrance region jet forcing...

continues to produce a narrow corridor of widespread precipitation
mainly between m-55 and m-32. Obs suggest mainly rain although
polarimetric radar data does suggest some mix along the northern
edge of the precip. Precip amounts within this axis have been
respectable over the last 24 hours... Running around three quarters
of an inch. A second corridor of precip sits through southern
lower michigan along the warm front itself.

Primary forecast concerns... P-type issues... Of course.

Today: elongated deformation axis and upper jet forcing finally
looking to weaken while getting suppressed down into central
lower michigan by mid to late morning... As strong canadian high
pressure pivots across the northern lakes region. Will keep some
high pops going early on with a little bit of wintry mix in the
high terrain... Before diminishing pops to just chancy and mainly
for areas south of m-72. Despite the mixy precip, temperatures
remain largely in the middle 30s where precip is occurring. Thus
no headline for today.

Otherwise, high pressure and drier air nudging in from the north
should help thin out cloud cover through the day. Far northern
part of the CWA may even see a fair amount of sunshine today,
particularly in eastern upper michigan.

Tonight: closed/occluded low in the plains expected to finally
open up and advance up into the western ohio valley/lower great
lakes by Sunday morning. This will bring a northward bulge of
warmer air back up into northern michigan as we go through the
night while opening up that feed of gulf moisture into the great
lakes... Spreading precip back up through the region. Once again,
primarily liquid anticipated as pronounced wedge of warm air aloft
surges northward (h8 temps exceeding 8c by morning). So once
again, surface temperatures will be paramount. Strong easterly dry
flow from the departing high pressure system will be a player and
will likely keep temps below freezing across eastern upper michigan
through the night... And possibly parts of NE lower michigan/tip
of the mitt. But a solid freezing rain event appears likely for
eastern upper michigan while some freezing rain/light icing is
likely across the tip of the mitt.

Headline-wise: currently have between one and two tenths of an
inch of ice for much of eastern upper michigan and around one
tenth or less for the tip of the mitt. Thus, a high probability
that an advisory will be needed in eastern upper michigan and
perhaps the tip of the mitt... Which I may be issuing within the
next few hours. Will be collaborating with surrounding wfos to
make that call.

Finally as a side note... Will need to keep a close eye on river
gages over the next few days given the decent amount of rainfall
we have see.

Short term (Sunday through Monday)
issued at 330 am edt Sat mar 25 2017

To ice or not to ice part trois(three)...

high impact weather potential... Significant ice is likely into
Sunday morning in E upper with smaller chances in NE lower.

There is a small chance for icing Sunday night into Monday.

Pattern synopsis/forecast... By 12z/sun the rain is over the region,
and model soundings are showing that the fzra that was in NE lower
overnight has moved to E upper for the first few hours of the
morning. 15z/sun, temperatures are back above freezing so that we
should begin to lose the ice. Sfc temperatures continue above
freezing through 00z/mon, and probably later as we are still warm
advecting. Overnight, it is possible that there will be patches of
freezing rain, but overall, it looks like rain on into Monday. It
looks like there could be a period where things stop, before a
deformation zone moves into the forecast area and brings the rain
back. After 00z/tues it looks like the rain, or maybe evening light
snow is possible before the models dry things out.

Primary forecast concerns... Freezing rain on Sunday morning looks
like a sure bet in E upper, the question is whether the warmer air
pushes into NE lower in time to stop the freezing much into the
morning period. SREF plumes seem to say yes with the most dominate
precipitation type after 12z/sun being rain.

Sref plumes also show that there is little chance for freezing rain
in E upper, with only two to the 27 members being below freezing. So
will adjust to keep the fzra Monday night to a minimum.

Long term (Monday night through Friday)
issued at 330 am edt Sat mar 25 2017
high impact weather potential... None
extended (Tuesday through Friday)... After the system moves east,
then high pressure builds into the forecast area through Wednesday
night, before the next system begins to move into the forecast which
looks like as early as Thursday on the ecmwf, and Friday morning on
the gfs. And like the timing that is different on both the p-type is
as well, with the GFS showing snow and the ECMWF showing rain.

Aviation (for the 12z tafs through 12z Sunday morning)
issued at 652 am edt Sat mar 25 2017
drier air will nose down into northern lower michigan today and
should bring improving conditions to the terminal sites... Where
conditions should slowly improve toVFR. Low pressure will track
up into the midwest today and up through lower michigan tonight.

This will bring another slug of rainfall up through the region
tonight with conditions dropping back to MVFR/ifr. Pln may see a
period of fzra tonight with temps around freezing.

Marine
Issued at 330 am edt Sat mar 25 2017
easterly flow will be increasing through the day as high pressure
slides through the northern lakes... And low pressure lifts into
the midwest. This will lead to small craft advisory waves/gusts on
lake michigan and lake huron today and most of tonight.

Winds/waves will weaken on Sunday as the low tracks up through
lower michigan.

Apx watches/warnings/advisories
Mi... None.

Lh... Small craft advisory until 5 am edt Sunday for
lhz345>349.

Lm... Small craft advisory until 5 am edt Sunday for
lmz323-341-342- 344>346.

Ls... None.

Near term... Tba
short term... Jsl
long term... Jsl
aviation... Tba
marine... Tba


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GTLM4 - Grand Traverse Light, MI 28 mi63 min E 12 G 16 35°F 1026.8 hPa
MACM4 - 9075080 - Mackinaw City, MI 42 mi43 min E 13 G 19 31°F 1027.3 hPa (+1.6)25°F
WSLM4 44 mi43 min ENE 21 31°F 1027.4 hPa (+1.3)28°F

Wind History for Mackinaw City, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charlevoix, Charlevoix Municipal Airport, MI15 mi48 minE 117.00 miOvercast34°F32°F94%1027.8 hPa
Harbor Springs, Harbor Springs Airport, MI16 mi49 minENE 16 G 2210.00 miOvercast33°F30°F89%1027.1 hPa
Bellaire, Antrim County Airport, MI18 mi48 minENE 5 G 1510.00 miOvercast36°F31°F86%1026.1 hPa
Gaylord, Otsego County Airport, MI22 mi50 minE 72.50 miLight Snow Fog/Mist33°F28°F85%1027.1 hPa

Wind History from CVX (wind in knots)
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Last 24hrW5N5N5N6N7N6N6N7N4NE6N5NE4NE5E5E5E6NE7E7NE8E10E10
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1 day agoS7S5S8S5S8SE7SE5SE5SE7SE4SE5E6SE8SE4SE3
G33
E6SE4SE4SE4SE3CalmE4CalmW4
2 days agoN6NW7N7NW6NW6W4W5CalmCalmCalmCalmCalmSE3SE3SE3SE3E4SE4E5CalmSE5SE5S7S8

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Gaylord, MI (11,2,3,4)
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Ground Weather Radar Station Gaylord, MI
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.