Monday, June26, 2017 L-36.com


Marine Weather and Tides
Manistee, 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 6:05AMSunset 9:30PM Monday June 26, 2017 6:28 PM EDT (22:28 UTC) Moonrise 8:03AMMoonset 10:42PM 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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LMZ849 Pentwater To Manistee Mi- 343 Pm Edt Mon Jun 26 2017
.small craft advisory in effect until midnight edt tonight...
Tonight..Northwest winds 15 to 25 knots backing west after midnight. Partly cloudy with a slight chance of showers and Thunderstorms in the evening, then mostly clear overnight. A slight chance of waterspouts through the night. Waves 4 to 6 feet subsiding to 1 to 2 feet toward daybreak.
Tuesday..West winds 10 to 15 knots backing southwest late in the day. Sunny. Waves 1 to 2 feet.
Tuesday night..South winds 10 to 20 knots. Mostly clear. Waves 1 to 3 feet.
Wednesday..South winds to 30 knots. Partly Sunny with a slight chance of showers and Thunderstorms until midday, then showers and Thunderstorms likely in the afternoon. Waves 3 to 6 feet.
LMZ849 Expires:201706270315;;862826 FZUS53 KGRR 261943 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 343 PM EDT Mon Jun 26 2017 For waters within five nautical miles of shore on Lake Michigan LMZ849-270315-

7 Day Forecast for Marine Location Near Manistee, MI
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location: 44.25, -86.33     debug


Area Discussion for - Gaylord, MI
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Fxus63 kapx 261841
afdapx
area forecast discussion
national weather service gaylord mi
241 pm edt Mon jun 26 2017

Near term (tonight through Tuesday)
issued at 239 pm edt Mon jun 26 2017
high impact weather potential: isolated thunderstorms again. No
severe storms, but small hail possible.

Pattern synopsis and forecast:
large scale upper troughing and cooler conditions continuing across
nrn michigan. Sfc low pressure still in eastern upper with numerous
rain showers buried in the better low level cyclonic flow.

Meanwhile, there have been a few holes in the cloud cover along and
south of m-68 in NRN lower. Not much heating, but we have been able
to pop off some diurnally driven rain showers in a moist air mass
underneath the persistent steeper lapse rates aloft around 6.5c km.

Further upstream, a upper level low was dropping SE and into lake
michigan. Moisture was increasing out ahead, with dpva and diurnal
processes helping to fire off more rain showers. The main shower
activity however, remained on the W NW flank of the upper low,
within the deformation zone and deepest moisture. Instability as
earlier thought, has been rather minimal. Virtually none across
eastern upper, 100-200j kg in most of NRN lower, to up to 500j kg
the most closer to saginaw bay.

The sfc low pressure will slide east of eastern upper through the
later afternoon and evening, and the stronger low level convergence
will start to wane. This will help to break up the steadier nature
of the rainfall. The deformation rains however, will be wrapping at
the same time, and also down across NW lower. This upper low makes
it into SE lower michigan by midnight with the help of another wave
seen diving through ontario, and then both will be east of us
Tuesday. The deformation will be weakening with time as the upper
low gets further away through evening. With this being the main
forcing, am expecting incoming showers to be breaking up with time
as well. This trend has been picked up by higher resolution data,
and have gradually stepped down chances for rain with time (numerous
west scattered east this evening... Becoming isolated to ending
overnight.

This whole transition will slowly put NRN michigan in NW flow aloft
on Tuesday, as ridging tries to work into the upper midwest. There
is some drying that takes place into Tuesday, but overall pwats
remain around 0.75". Am expecting a decent CU field to develop late
morning to afternoon with a tendency for onshore flow to develop,
especially across interior eastern upper and far NE lower. The cu
field is likely to be most dense in these areas. There is not much
in the way of forcing dynamics aloft with some weak vorticity
dropping into the region, but maybe a shower or two can develop
within the lake breeze convergence. No thunder chance seen at this
point.

Lows tonight in the lower 40s north to the upper 40s in far ne
lower. Highs Tuesday in the lower half of the 70s most areas,
possibly middle 70s in downsloping regions of NE lower.

Short term (Tuesday night through Thursday)
issued at 239 pm edt Mon jun 26 2017

Heavy rain event possible Wednesday night and Thursday...

high impact weather potential... Heavy rainfall flooding possible
Wednesday night into Thursday.

Pattern synopsis forecast... Surface low moving across southern
canada will drag frontal system east through Thursday. As the system
runs into strong high over the SE us, front lags the low and becomes
more parallel to mean flow. In addition, strong 60kt+ LLJ develops
over the midwest Wednesday and moves into mi Thursday. Abundant
moisture available with gulf wide open. Set up is similar to last
week's heavy rain event, without the tropical system.

Primary forecast concerns challenges... Potential heavy rain event
setting up Wednesday night into Thursday. Initially warm front
approaches region Wednesday evening. Deep moisture and strong
isentropic ascent as LLJ pushes gulf air over the front. Lift
enhanced by left exit region of 100kt upper jet. Mean rh values
close to 90% with pwats over 1.5" for a 12 hour span. Then sw-ne
oriented cold front crosses region Thursday. LLJ and mean flow
nearly parallel which could lead to slow movement of heavy rain
producing cells. However, CAPE values remain low throughout the
event which could mean heaviest rain falls south of cwa. As always,
the trick as with the last system, will be to narrow down where
heavy rain swath will occur.

With all of the rainfall over the past week, 6hr flash flood
guidance values are down to near 2" over southern and eastern parts
of the cwa. QPF values of over 2" are possible, wpc has placed all
of our CWA in the marginal to slight risk of excessive rainfall for
day 3. Flood watches and warnings may be needed for late Wednesday
and into Thursday. Tonight's and tomorrow's model runs should give a
better indication of where the heavy rain will set up and where
watches and warnings are needed.

Long term (Thursday night through Monday)
issued at 239 pm edt Mon jun 26 2017
good deal of uncertainty with the extended period, especially with
rain chances over the weekend. The combination of surface low
pressure out of the plains and another shortwave pivoting out of
canada and into the great lakes region is bringing a non-zero chance
of rain for the weekend. The question is when and where, with some
guidance keeping the surface low and bulk of the precip to our
south, and others bringing it right overhead. A second round of
showers will likely follow later in the weekend or early next week
as the axis of h5 troughing clears the area. Will certainly need to
keep an eye on the SE portion of the CWA for rainfall totals, given
the wet antecedent condtions and somewhat anomalous pwat values
progged not too far to our south. Temperatures are expected to be
near normal, perhaps just a touch below.

Aviation (for the 18z tafs through 18z Tuesday afternoon)
issued at 142 pm edt Mon jun 26 2017
sfc low pressure will slide east of us through evening, while an
upper level low pressure will drop into the region tonight. While
a tighter pressure gradient continues to develop from SW to ne
into this evening, expect some gustier westerly winds than
previously anticipated. Also, ahead with the upper low an arcing
bands of showers is expected to wrap into NW lower and gradually
progress east through tonight and weaken, with the showers become
more and more isolated. CIGS will become increasingly MVFR as
deeper lower level moisture slides in with the showers. Some
drying expected later tonight and into Tuesday, with higher based
cumulus developing and little to no chance for additional rains.

Marine
Issued at 239 pm edt Mon jun 26 2017
low end advisory gusts continue across portions of the lake michigan
nearshore waters, especially southern areas. Had earlier issued
advisories for the NRN nearshore waters of lake huron, as the
gradient appears to tighten up enough tonight. High pressure then
slips SE of the region, allowing winds to become more southerly
through Tuesday and Tuesday night. There is an increase in speed
Tuesday night, but with increasing stability, will not issue any
advisories attm. A much more substantial increase in speed is seen
later Wednesday and Wednesday night, out ahead of a respectable area
of low pressure that will bring showers and thunderstorms. Rainfall
may be quite heavy Wednesday night.

Apx watches warnings advisories
Mi... None.

Lh... Small craft advisory from 8 pm this evening to 5 am edt Tuesday
for lhz347-348.

Lm... Small craft advisory until midnight edt tonight for lmz342-
344>346.

Ls... Small craft advisory until midnight edt tonight for lsz321-322.

Near term... Smd
short term... Kjf
long term... Alm
aviation... Smd
marine... Smd


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEEM4 - Manistee Harbor, MI 1 mi48 min W 8.9 G 12 57°F 1016.6 hPa
BSBM4 - Big Sable Point, MI 17 mi48 min W 9.9 G 12 57°F 1016.9 hPa
LDTM4 - 9087023 - Ludington, MI 22 mi40 min WNW 6 G 9.9 57°F 46°F
45024 23 mi18 min W 9.7 G 14 57°F 64°F3 ft1016.3 hPa50°F

Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manistee County - Blacker Airport, MI5 mi32 minWNW 1010.00 miMostly Cloudy59°F46°F64%1017.6 hPa
Ludington, Mason County Airport, MI20 mi33 minNW 710.00 miMostly Cloudy57°F48°F72%1015.9 hPa

Wind History from MBL (wind in knots)
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Last 24hrSW10SW3W8W7CalmE3W8W10W11W11W14W10W11W13W15
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1 day agoW8W6NW5CalmCalmCalmNW9
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2 days agoW8SW10NW9NW9N7NW3CalmW3CalmCalmSW3CalmCalmW5W12NW14NW10
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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.