Sunday, October22, 2017 L-36.com


Marine Weather and Tides
Harrisville, MI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:48AMSunset 6:28PM Sunday October 22, 2017 6:34 PM EDT (22:34 UTC) Moonrise 9:30AMMoonset 7:34PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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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LHZ362 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- 349 Pm Edt Sun Oct 22 2017
Tonight..South winds 15 to 20 knots with gusts to 30 knots decreasing to 5 to 10 knots. A chance of showers in the late evening and early morning. Rain showers likely early in the morning. Waves 5 to 7 feet. Waves occasionally around 10 feet.
Monday..South winds 5 to 10 knots veering to the north early in the afternoon...then becoming northeast 10 to 15 knots late in the afternoon. Showers in the morning. Rain in the late morning and afternoon. Rain may be heavy at times late in the afternoon. Waves 3 to 5 feet.
Monday night..East winds 15 to 20 knots increasing to 20 to 25 knots with gusts to 35 knot gales in the late evening and early morning...then veering to the southeast with gusts to 30 knots after midnight. Showers until early morning...then showers likely early in the morning. Locally heavy rainfall possible until early morning. Waves 2 to 4 feet.
Tuesday..Southwest winds 20 to 25 knots becoming south 15 to 20 knots early in the afternoon. Showers likely. Waves 2 to 4 feet building to 3 to 5 feet in the late morning and afternoon.
Tuesday night..Southwest winds 15 to 20 knots increasing to 20 to 25 knots in the late evening and overnight. Gusts to 30 knots. Showers likely. Waves 5 to 7 feet. Waves occasionally around 10 feet.
Wednesday..West winds 15 to 20 knots becoming northwest 5 to 10 knots. Showers likely early in the morning...then a chance of showers early in the morning. Waves 4 to 6 feet. Waves occasionally around 8 feet.
Thursday..North winds 5 to 10 knots backing to the west in the late morning and early afternoon...then becoming south 10 to 15 knots early in the evening increasing to 15 to 20 knots in the late evening and early morning. Waves 1 to 3 feet building to 4 to 6 feet in the late evening and early morning. Waves occasionally around 8 feet.
Friday..South winds 15 to 20 knots becoming southeast 10 to 15 knots in the late morning and early afternoon...then veering to the southwest early in the evening increasing to 15 to 20 knots in the late evening and early morning. Showers likely until late afternoon. A chance of showers until early morning. Waves 6 to 9 feet. Waves occasionally around 12 feet.
LHZ362 Expires:201710230800;;250781 FZUS63 KDTX 221953 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 349 PM EDT Sun Oct 22 2017 For waters beyond five nautical miles off shore on Lake Huron Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. .SYNOPSIS...A cold front averaging 29.90 inches will move through the Central Great Lakes tonight. Deepening low pressure is then forecast to lift into the area early next week. LHZ362-363-230800-

7 Day Forecast for Marine Location Near Harrisville, MI
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location: 44.99, -82.16     debug


Area Discussion for - Gaylord, MI
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Fxus63 kapx 221952
afdapx
area forecast discussion
national weather service gaylord mi
352 pm edt Sun oct 22 2017

Near term (tonight through Monday)
issued at 352 pm edt Sun oct 22 2017

Wet...

high impact weather potential... Heavy rain possible near saginaw
bay Monday afternoon.

Cold front is just pushing into western mack co as well as mbl
frankfort. This front will slow as it crosses northern mi this
evening, and stall over lk huron overnight. The front stalls
thanks to a vigorous and deepening surface low moving NE along the
front. Said low will cross SE lower mi Monday afternoon. Precip
trends are the main concern.

Band of moderate showers working across NW lower eastern upper mi
presently, just ahead of the surface cold front. Weaker showers
extend westward behind the front a good ways, to around iwd and lse.

Better precip rates with this initial batch of showers will move out
and or fade out by mid late evening. However, precip rates may
rebound overnight in NE lower mi, as multiple pieces of energy eject
nne-ward from the ohio valley, parallel to the stalling front. That
leads to some increased fgen forcing, just on the cool side of the
boundary. This won't be especially heavy, but total nighttime
precip could reach 0.50 inches across a good portion of N central
and NE lower. Meanwhile, decreasing pops will be seen overnight w
of an anj-tvc line. This will be especially the case in western
chip mack cos, where partial clearing will occur late.

Min temps tonight from near 40f in western chip mack to lower 50s
near saginaw bay.

Primary upper trof will dig into the upper ms valley on Monday. An
initially closed 500mb low will open up but take on a negative tilt
as it ejects ahead of this digging trof, gradually moving up the
ohio valley. As this occurs, the associated surface low will move
nne along the stalled front (from SW in to the thumb area),
strengthening as it goes. Deformation and fgen forcing will amp up
substantially in portions of central and eastern lower mi. Exactly
where the band of heaviest rain sets up is still somewhat uncertain
(it's possible the heaviest just misses us to the S and e). But rain
will continue just on the cool side of the front in N central and ne
lower mi, and will become heavier with time. Forecast precip amounts
for the 8am-8pm window will be around an inch SE of an htl-apn line,
rapidly falling off as you head further nw. Places like frankfort
leland trout lk will only have a very small chance of rain.

Max temps mid 50s to around 60f. Not too much in the way of wind,
with NE lower seeing a N to nne breeze in the afternoon.

Short term (Monday night through Wednesday)
issued at 352 pm edt Sun oct 22 2017

The transition begins...

high impact weather potential... Heavy rain into Monday night, that
could produce flooding near saginaw bay. Gusty winds winds on
Tuesday and Tuesday night.

Pattern synopsis forecast... The 500 mb low that is to the northwest
moves into the upper great lakes Monday night and and helps to
develop the sfc low. The sfc will help to get the reinforcing shot
of cooler air to transition our warm fall to something more
seasonal. It is also expected to produce more precipitation helping
to alleviate the dry conditions. However, it does look like we could
get too much of a good thing as the 500 mb low gets a piece of
energy on the backside that allow the 500 mb low to retrograde back
into michigan and continue the rain with heavy stripe of rain
expected from east of i-75 and into the saginaw river valley. This
retrogrades the sfc low as well so that gradient tightens up and we
get high winds over NW lower. The GFS delays best gradient until
Tuesday night, while the ECMWF is faster, and holds in place into
Tuesday evening. Winds should diminish overnight as the sfc low
moves out. 850 mb temperatures fall enough that there could be some
concern for mixed rain and snow or all snow in E upper, late Tuesday
night into Wednesday morning. Dry air then begins to move into the
region by Wednesday afternoon, and should begin to clear things out.

Primary forecast concerns... The rain has become an issue for Monday
afternoon night. The rain fall could be 2 to 3" or more over the 12
hours. That would be enough for the rifle river at sterling to go
over flood stage Tuesday night Wednesday morning. If that happens,
it is possible that we could get some creeks and streams to go over
their banks as well. Winds on Tuesday will be the other issue as the
models haven't brought about a consensus, but the ECMWF is holding
firm to its solution and now has the nam12 to back it up. My guess
is that we will probably have some low wind advisory headlines
needed, at least along the lake shore.

Long term (Wednesday night through Sunday)
issued at 352 pm edt Sun oct 22 2017
extended (Wednesday night through Sunday)... The pattern, as was
said yesterday, looks to be trying to establish a ridge trough
pattern as is usually the case the last several winters. So with
several upper lows expected to move through the area, the region
will see temperatures slightly above and below normal. Wednesday
night the 500 mb trough moves out, and thing remain dry into
Thursday. The GFS disagree on the speed of the 500 mb ridge
Thursday night as the GFS pushes it straight into the upper great
lakes. The ECMWF is much slower, not allowing the next system to
move into the upper great lakes until late Friday. Friday night
into Sunday, both models have rain, but for different reasons, as
the timing of the 500 mb low moving through the upper great lakes
is off between them by about 12 hours.

Aviation (for the 18z tafs through 18z Monday afternoon)
issued at 131 pm edt Sun oct 22 2017
MVFR to ifr conditions arriving.

Cold front starting to advance across lake mi, and will slow
somewhat as it crosses northern mi this evening, before stalling
overnight over lk huron. Showers and MVFR CIGS already pushing
into the mbl area, and will gradually expand eastward, reaching
apn toward 00z. CIGS will eventually descend to borderline
MVFR ifr by tonight. This will improve toVFR Monday morning at
all sites but apn.

Gusty southerly winds ahead of the front will become weaker nw
winds behind it.

Marine
Issued at 352 pm edt Sun oct 22 2017
gusty southerly winds will be supplanted by weaker NW winds this
afternoon evening, as a cold front crosses the region. This front
will stall over lk huron late tonight, leading to relatively light
winds for much of Monday, with a N to NE breeze developing on
huron in the afternoon. Stronger winds will develop Monday night
and Tuesday, as low pressure strengthens and moves north across
and away from lk huron.

Apx watches warnings advisories
Mi... None.

Lh... Small craft advisory until 6 am edt Monday for lhz346>349.

Lm... Small craft advisory until 6 pm edt this evening for lmz323-341-
342-344>346.

Ls... Small craft advisory until 6 pm edt this evening for lsz321.

Near term... Jz
short term... Jl
long term... Jl
aviation... Jz
marine... Jz


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45003 - N HURON 37NM Northeast of Alpena, MI 44 mi45 min SSE 19 G 21 62°F 58°F5 ft1012.6 hPa (-2.1)
LPNM4 - Alpena, MI - 9075065 67 mi47 min SSE 8.9 G 15 60°F 1012.9 hPa56°F
APNM4 - Alpena Harbor Light, MI 67 mi35 min SSE 15 G 17 60°F

Wind History for Alpena, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oscoda, Oscoda-Wurtsmith Airport, MI75 mi41 minS 9 G 1910.00 miPartly Cloudy73°F53°F51%1013.5 hPa

Wind History from OSC (wind in knots)
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Last 24hrS6S13
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1 day agoS6S8
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2 days agoW7W5CalmSW5W6SW6W8SW8SW5SW4SW7SW5SW7SW3SW6SW8
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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 (18,4,5,8)
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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.