Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Tawas City, 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 7:39AMSunset 5:05PM Thursday November 23, 2017 11:02 PM EST (04:02 UTC) Moonrise 11:41AMMoonset 9:26PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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LHZ349 Sturgeon Pt To Alabaster Mi- 1020 Pm Est Thu Nov 23 2017
.gale warning in effect from 4 am est Friday through Friday evening...
Overnight..Southwest wind 10 to 20 knots with gusts to around 25 knots. Mostly clear. Waves 2 feet or less building to 3 to 5 feet after midnight.
Friday..Southwest wind 15 to 25 knots with gusts to around 35 knots. Partly Sunny. Waves 4 to 6 feet.
Friday night..West wind 15 to 25 knots with gusts to around 35 knots. Chance of showers and drizzle. Waves 4 to 6 feet.
Saturday..Northwest wind 10 to 20 knots with gusts to around 25 knots. Mostly cloudy. Waves 2 to 3 feet. SEe the open lakes forecast for days 3 through 5.
LHZ349 Expires:201711241100;;870508 FZUS53 KAPX 240320 NSHAPX Nearshore Marine Forecast National Weather Service Gaylord MI 1020 PM EST Thu Nov 23 2017 For waters within five nautical miles of shore on Lakes Huron... Michigan and Superior LHZ349-241100-

7 Day Forecast for Marine Location Near Tawas City, MI
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location: 44.27, -83.52     debug


Area Discussion for - Gaylord, MI
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Fxus63 kapx 240308
afdapx
area forecast discussion
national weather service gaylord mi
1008 pm est Thu nov 23 2017

Update
Issued at 1008 pm est Thu nov 23 2017
evening satellite... Upper air and surface maps reveal short wave
troughing and colder air retreating eastward out of the great
lakes. Low amplitude ridging noted upstream across the plains and
into the rockies and well defined low-mid level thermal ridging
stretches up through the central conus... Nosing into the upper
midwest. Surface low pressure is over south-central canada with a
tight p-gradient and increasing low-mid level warm advection
flow forcing edging into the northern lakes region. Several small
pockets of warm advection forced showers already noted spreading
westward across western upper michigan this evening along the
eastward edge of the advancing warm air.

Rest of tonight into early Friday... Pulse of low-mid level warm
advection forcing spreads across the northern lakes region over
the next several hours... As upstream thermal ridge axis folds into
the western great lakes and warmer air begins to flood into the
region. Given the upstream radar trends... Certainly looks like a
few light showers sprinkles will make it into and across eastern
upper mi tip of the mitt areas after midnight or so... And have
pushed pops into those areas a little quicker than inherited
forecast. Given how quickly temperature profiles (sfc and aloft)
warm to above freezing over the next next several hours... Anything
that does reach the ground should mostly be of the liquid
variety... Although it could be close. In any event... Very minimal
qpf anticipated with little or no impact.

Near term (tonight through Friday)
issued at 238 pm est Thu nov 23 2017

Milder yet for Friday...

high impact weather potential... Minimal over land. Gale force wind
gusts expected across lake michigan and on portions of lake huron
Friday.

Pattern synopsis forecast... Remarkably progressive pattern continues
(with no end in sight), with one shortwave trough on the way out,
with yet another set to arrive Friday. Lack of moisture with today's
passing wave well evident, with just some spotty morning drizzle and
weakish lake effect, especially off lake superior. Wave arriving
Friday looks to have a bit more moisture to work with, perhaps
enough to drum up a bit of light rain as it passes.

Primary forecast concerns challenges: temperature and cloud trends
through the forecast. Addressing that light rain potential Friday.

Details: warm air advection strengthens with time tonight as
southwest flow intensifies well ahead of that next approaching wave.

Dry conditions expected much of the overnight, with that deepening
warm air advection perhaps kicking off some light showers late
across eastern upper michigan. With warming thermal profiles and a
deep elevated above freezing layer, suspect any precipitation that
does occur will remain liquid.

And, that WAA regime continues right through Friday out ahead of a
deepening area of low pressure and its attendant cold front. Rain
showers are expected, particularly across the north where deeper
saturation will be realized. Increasingly gusty southwest winds will
do a number to temperatures, with afternoon readings expected to top
out well into the 40s, with even some lower 50s near lake michigan.

If more Sun is realized, can see 50s a bit more common even further
inland.

Short term (Friday night through Sunday)
issued at 238 pm est Thu nov 23 2017

Seasonably cool with a wintry mix early followed by some light
snow to end the weekend...

high impact weather potential: wintry mix or drizzle Saturday
trending toward snow Sunday, increasing the threat for some slippery
driving conditions.

Primary forecast concerns challenges: precipitation type Friday
night and Saturday with dry air aloft.

Pattern synopsis forecast... At upper levels, a 500mb trough dropping
south into the northern plains Friday, will settle over the great
lakes Saturday, before pushing east toward the north atlantic Sunday
night. Mid level temperatures in this pattern will drop from around
+8c Friday night in advance of the approaching 500mb wave, to around
-12c Saturday as the upper trough swings over the state. 850mb temps
recover slightly to around -5c to -7c Sunday evening as the upper
trough pushes east. At the surface, a strong storm system pushing
across canada and into ontario Friday, will sweep a cold front
across the great lakes Friday night as the storm sytem lifts into
quebec. This front will exit the region Saturday night. A narrow
area of high pressure will sweep over the state Sunday morning,
before a clipper quickly drops out of ontario and into the great
lakes Sunday evening.

Overall, model soundings showing a thermal temperature profile
sufficient for an all rain event across northern michigan Friday
evening, with freezing levels over 8k ft in advance of approaching
cold front. However low lvl temp profiles drop significantly between
06z and 12z Sat on the backside of the exiting boundary, with the
freezing level dropping to under 1400 ft. Additionally, model
soundings show mid and upper lvl mstr decreasing rapidly by 12z sat
across northern michigan, while abundant low lvl mstr remains
trapped below the inversion into early Sunday, in a temp profile
between 0c and -9c. This will increase the likelihood of drizzle or
freezing drizzle across much of the forecast area Saturday and
Saturday night. Any lingering drizzle early Sunday should transit to
all snow during the day, as upper lvl mstr increases with
approaching shortwave, helping ice crystal seeding from aloft
(though mid levels seem to remain dry).

Long term (Sunday night through Thursday)
issued at 238 pm est Thu nov 23 2017
pattern remains similar to what we have been seeing for the past few
days, with height rises and warming temperatures building in getting
briefly disrupted by clippers passing near or through the region.

Timing is often difficult with these energetic setups, but right now
it looks like precipitation chances will be tied to systems moving
through mid-week as well as late in the week. Expect above normal
temperatures through the period, with the brief cool downs serving
to get temperatures closer to normal.

Aviation (for the 00z tafs through 00z Friday evening)
issued at 715 pm est Thu nov 23 2017
vfr cloud deck continues to steadily erode w-e across northern
lower michigan this evening... Now largely clr at tvc and mbl. That
trend will persist this evening although there will be thicker
mid and high cloud cover settling into the region overnight into
Friday.

Bigger issue is wind. Strong southerly flow will develop late
overnight and persist through much of Friday. This will lead to
some gustier winds during the day Friday. But a fairly strong low
level temperature inversion will also lead to llws issues on
Friday... Even through the day.

Marine
Issued at 238 pm est Thu nov 23 2017
widespread gale and small craft advisory conditions expected
through Friday as strong low pressure develops and advances across
the northern lakes. Gale gusts expected to hold off until very late
tonight for northern lake michigan, with gale conditions expected on
lake michigan and areas down near saginaw bay on lake huron during
the day Friday. While gales come to an end Friday evening, small
craft advisory conditions expected to continue on all waters through
Saturday.

Apx watches warnings advisories
Mi... None.

Lh... Small craft advisory until 10 pm est Friday for lhz345>347.

Gale warning from 4 am to 10 pm est Friday for lhz348-349.

Lm... Gale warning from 4 am to 10 pm est Friday for lmz323-341-342-
344>346.

Ls... Small craft advisory until 10 pm est Friday for lsz321-322.

Update... Ba
near term... mb
short term... Sr
long term... Am
aviation... Ba
marine... mb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TAWM4 - Tawas City, MI 4 mi83 min SW 7 G 8.9 35°F 1012.9 hPa
GSLM4 - Gravelly Shoals Light MI 17 mi81 min SSW 16 G 20 39°F 1012.9 hPa
SBLM4 - Saginaw Bay Light #1, MI 34 mi63 min SW 11 G 14 38°F 1012.5 hPa (+0.0)
KP58 42 mi72 min SW 4.1 34°F 1013.1 hPa22°F

Wind History for Harbor Beach, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oscoda, Oscoda-Wurtsmith Airport, MI15 mi69 minN 010.00 miFair29°F22°F76%1012.2 hPa

Wind History from OSC (wind in knots)
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1 day agoN14
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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 (23,6,7,8)
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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.