Monday, June26, 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 5:38AMSunset 9:14PM Monday June 26, 2017 8:22 AM EDT (12:22 UTC) Moonrise 7:44AMMoonset 10:27PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 354 Am Edt Mon Jun 26 2017
Today..Southwest winds 5 to 10 knots backing to the south in the late morning and afternoon. A chance of showers. Waves 1 to 3 feet building to 2 to 4 feet in the afternoon.
Tonight..West winds 5 to 10 knots becoming northwest 10 to 15 knots after midnight. A chance of showers early in the evening. Waves 1 to 3 feet.
Tuesday..Northwest winds 10 to 15 knots becoming southwest 5 to 10 knots early in the afternoon. Waves 2 to 4 feet subsiding to 1 to 3 feet early in the afternoon.
Tuesday night..Southwest winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Waves 2 feet or less.
Wednesday..South winds 10 to 15 knots increasing to 15 to 20 knots late in the evening. Showers and Thunderstorms early in the evening. Waves 1 to 3 feet building to 4 to 6 feet late in the evening. Waves occasionally around 8 feet.
Thursday..South winds 15 to 20 knots becoming southwest 10 to 15 knots. Showers and Thunderstorms early in the morning...then a chance of showers and Thunderstorms until early evening. Waves 4 to 6 feet subsiding to 1 to 3 feet in the late evening and early morning. Waves occasionally around 8 feet.
Friday..West winds 5 to 10 knots veering to the northeast until early morning. A chance of showers and Thunderstorms. Waves 2 feet or less.
LHZ362 Expires:201706262000;;836776 FZUS63 KDTX 260757 GLFLH Open Lake Forecast for Lake Huron National Weather Service Detroit/Pontiac MI 354 AM EDT Mon Jun 26 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...Surface troughing...averaging 29.90 inches...will linger over Lake Huron throughout the day. This trough extends from an area of low pressure...also averaging 29.90 inches...anchored southern Ontario. This low will weaken as it gradually drifts northeast through the early week period. High pressure will then expand into the area Tuesday and Wednesday bringing quiet weather conditions. LHZ362-363-262000-

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 260836
afdapx
area forecast discussion
national weather service gaylord mi
436 am edt Mon jun 26 2017

Near term (today through tonight)
issued at 433 am edt Mon jun 26 2017

Cool and showery once again today...

high impact weather potential: minimal outside of perhaps a few
thunderstorms mainly across northern lower.

Pattern synopsis forecast: 05z surface composite analysis shows a
1014mb low developing over eastern upper eastern lake superior...

ahead of a short wave trough PV anomaly over the arrowhead of
minnesota. Water vapor imagery shows an associated vorticity lobe
rotating into central upper western lower michigan... Ahead of this
feature is a broken band of showers stretching from western lake
superior (aided by stronger forcing along the short wave trough and
some modest isentropic ascent) southeast into northwest lower. Some
weak elevated instability helping some new shower development over
northern lower early this morning.

Developing surface low over the northeast half of the forecast area
this morning will be slow to move east as minnesota short wave
trough spins into lower michigan by early afternoon. This feature
expected to cross southern michigan this afternoon evening... Then
into the lower lakes overnight.

Primary forecast concerns: another day of showers is the main
problem for today. Initially... Expect shower coverage to continue
to expand eastward across northern lower during the pre-dawn
hours... Though with vorticity lobe already pushing into leelanau
benzie manistee counties expect showers to end there in the 08z-10z
time frame. This "drying" should also progress east across portions
of northern lower at least south of m-32 through mid late morning...

though will probably be cloudy for a time before cloud deck starts
to mix into a cumulus deck. Like the past several days... Thin
instability expected to develop with heating of the day... And added
forcing with short wave trough crossing the lower peninsula this
afternoon expected to drive another afternoon of scattered
convective development. Meanwhile... Showers will tend to persist
across the upper peninsula tip of the mitt counties along a mid
level deformation axis to the north of the approaching short wave
trough... Eventually this band of showers is expected to pivot across
northern lower at least through the evening hours and may even
persist into the overnight especially across northeast lower. So
bottom line is another unsettled day across the forecast area... With
temperatures likely to struggle to warm given anticipated cloud
cover. Forecast highs today from the upper 50s-mid 60s expected... A
solid 15 to 20 degrees below normal for late june.

Short term (Tuesday through Wednesday)
issued at 433 am edt Mon jun 26 2017

Warmer with rain arriving Wednesday afternoon...

high impact weather potential... Low. Chance for a few thunderstorms
across northwest lower late Wednesday afternoon.

Pattern synopsis forecast... Large surface high will be migrating
southeast across the ohio valley on Tuesday, drifting off the mid-
atlantic coast by Wednesday. This will gradually open up the gulf as
return flow develops over the plains, eventually bringing that
moisture into the great lakes region later Wednesday. Before then,
however, the upper trough that's been anchored over the great lakes
will finally be pushed east on Tuesday as a flattening ridge
upstream makes its approach. This will provide a period of
subsidence and generally dry weather with a decent amount of
sunshine through at least midday Wednesday. Increasing isentropic
lift will then bring showers and perhaps a few thunderstorms to
eastern upper and northwest lower Wednesday afternoon, with rain
overspreading the rest of northern michigan Wednesday evening as a
~50 knot low level jet noses into the region.

Ongoing warm air advection will bump high temperatures back into the
upper 60s to low 70s for Tuesday and then close to normal on
Wednesday in the low to mid 70s.

Primary forecast concerns... Outside chance for an isolated diurnal
shower on Tuesday and better rain chances later Wednesday will be
the main forecast challenges. In the northwest flow pattern aloft on
Tuesday, some weak mid-level energy will drop across northern
michigan. Given the dry airmass overhead (pwats ~0.6") and
subsidence from the surface high and approaching upper ridge, think
dry conditions will generally prevail across most of northern
michigan. However, over the last several runs models have been
hinting at the possibility of a few pop up showers near lake huron
Tuesday afternoon (particularly closer to saginaw bay) and perhaps
over eastern upper. There does look to be some marginal CAPE that
develops, so if forcing is strong enough to overcome the subsidence,
there may be a shower or two.

More significant impact will come from widespread heavier rain that
develops later Wednesday afternoon across our west and then spreads
across the rest of northern michigan through Wednesday night.

Minimal CAPE and decent capping aloft through Wednesday afternoon
over northwest lower, so thunder potential will be fairly low.

Long term (Wednesday night through Sunday)
issued at 433 am edt Mon jun 26 2017
high impact weather potential... Thunderstorms possible Wednesday
night into Thursday and again Friday afternoon evening.

A 50+ knot low level jet will nose into northern michigan late
Wednesday evening through the early morning hours of Thursday. With
the gulf wide open, this LLJ will advect abundant moisture into the
region with northern michigan sitting right on the nose of a large
area of strong moisture transport. Pwats will likely climb to around
1.75" overnight and warm cloud depths will be around 3.5 km or more.

So, expect efficient rainfall from this system Wednesday night into
Thursday morning (very well could be more than 1" for much of the
area), though models still have yet to come into good agreement on
some important details like timing and location of heaviest qpf.

Forecast details become murkier beyond Thursday with considerable
model discrepancies creeping in, but general pattern suggests
continued unsettled weather at times through the weekend. By Friday,
a baroclinic zone looks to set up from southern iowa to the thumb. A
wave of low pressure developing over the central plains is progged
to ride up along this baroclinic zone Friday into early Saturday,
providing another shot at some decent rainfall and thunderstorms for
northern lower as it interacts with a deepening shortwave over the
great lakes. Additional showers will be possible at times over the
weekend as a cold front drops through the region, though expect not
all of the area will see rain. Temperatures look to be near normal
through the period.

Aviation (for the 06z tafs through 06z Monday night)
issued at 1148 pm edt Sun jun 25 2017
MVFR CIGS return late tonight Monday morning.

Wx to remain unsettled, as front remains hung up across upper mi,
and another upper level disturbance approaches from the wnw. Low
pressure will gradually cross northern mi thru Monday. Anticipate
periodic shower activity thru Monday, along with perhaps a stray
tsra or two. Like last night, CIGS will decrease into MVFR
territory late tonight, with gradual improvement during the day
Monday.

Light W to NW winds tonight, becoming stronger (gusty at mbl) on
Monday.

Marine
Issued at 433 am edt Mon jun 26 2017
gusty winds within lake michigan nearshore zones from grand traverse
light southward have prompted small craft advisories to be issued
for today... With a more uniform west northwest wind component
developing as the day progresses as a surface low over eastern upper
this morning moves east this afternoon and tonight. Winds are
expected to back more southwesterly Tuesday afternoon into Tuesday
night.

Apx watches warnings advisories
Mi... None.

Lh... None.

Lm... Small craft advisory from 10 am this morning to midnight edt
tonight for lmz344>346.

Ls... None.

Near term... Jpb
short term... Mek
long term... Mek
aviation... Jz
marine... Jpb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45003 - N HURON 37NM Northeast of Alpena, MI 44 mi93 min SE 7.8 G 9.7 55°F 56°F1013.1 hPa (-0.0)
LPNM4 - Alpena, MI - 9075065 67 mi53 min W 1.9 G 2.9 55°F 1013.6 hPa53°F
APNM4 - Alpena Harbor Light, MI 67 mi33 min 56°F

Wind History for Alpena, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oscoda, Oscoda-Wurtsmith Airport, MI75 mi30 minWSW 610.00 miOvercast56°F54°F94%1014.2 hPa

Wind History from OSC (wind in knots)
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NE5CalmCalmW4W6W6W7CalmCalmCalmCalmCalmCalmW3SW3SW4SW6
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2 days agoW5SW4W3W5W4NW8
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E8E7S6S7E6S3CalmW4N4CalmCalmCalmW6SW3W5W6W11W12

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
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of GreatLakes    EDIT
Geos

Wind Forecast for Gaylord, MI (8,2,3,4)
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Ground Weather Radar Station Gaylord, MI
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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.