Monday, March27, 2017 L-36.com


Marine Weather and Tides
Whiting, IN

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.
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Sunrise 6:40AMSunset 7:11PM Sunday March 26, 2017 11:50 PM CDT (04:50 UTC) Moonrise 6:03AMMoonset 5:41PM Illumination 0% Phase: New Moon; Moon at 29 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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LMZ779 Lake Michigan From Michigan City In To St. Joseph Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Sheboygan To Port Washington Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Port Washington To North Point Light Wi 5 Nm Offshore To Mid Lake- Lake Michigan From North Point Light To Wind Point Wi 5 Nm Offshore To Mid Lake- Lake Michigan From Wind Point Wi To Winthrop Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Winthrop Harbor To Wilmette Harbor Il 5 Nm Offshore To Mid Lake- Lake Michigan From Wilmette Harbor Il To Michigan City In 5 Nm Offshore To Mid Lake- Lake Michigan From Whitehall To Pentwater Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Grand Haven To Whitehall Mi 5 Nm Offshore To Mid Lake- Lake Michigan From Holland To Grand Haven Mi 5 Nm Offshore To Mid Lake- Lake Michigan From South Haven To Holland Mi 5 Nm Offshore To Mid Lake- Lake Michigan From St. Joseph To South Haven Mi 5 Nm Offshore To Mid Lake- 817 Pm Cdt Sun Mar 26 2017 Sheboygan Wi To Pentwater Mi South...
.dense fog advisory in effect until 9 am cdt Monday...
Rest of tonight..West winds 10 to 15 kt becoming northwest. Areas of dense fog. Occasional rain showers this evening...then isolated rain showers overnight. Waves 2 to 4 ft subsiding to 1 to 3 ft.
Monday..North winds around 10 kt increasing to 10 to 20 kt late in the afternoon. Patchy fog in the morning. Chance of rain in the afternoon. Waves 1 to 3 ft building to 2 to 4 ft.
Monday night..North winds 10 to 20 kt quickly increasing to 15 to 25 kt. Chance of rain in the evening. Waves building to 4 to 7 ft occasionally to 9 ft.
Tuesday..North winds 15 to 25 kt. Waves 4 to 7 ft occasionally to 9 ft.
Tuesday night..North winds 15 to 25 kt becoming northeast. Waves 4 to 6 ft occasionally to 8 ft.
Wednesday..Northeast winds 10 to 20 kt. Waves 3 to 5 ft occasionally to 7 ft.
Wednesday night..Northeast winds 15 to 25 kt becoming east. Waves building to 4 to 6 ft occasionally to 8 ft.
Thursday..East winds to 30 kt. Rain likely. Waves 4 to 7 ft occasionally to 9 ft.
Friday..Northeast winds 15 to 25 kt becoming north to 30 kt. Rain likely. Waves building to 5 to 8 ft occasionally to 10 ft.
LMZ779 Expires:201703270930;;132728 FZUS63 KLOT 270117 GLFLM OPEN LAKE FORECAST FOR LAKE MICHIGAN NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 817 PM CDT SUN MAR 26 2017 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN. WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED. .SYNOPSIS...LOW PRESSURE OF 29.8 INCHES OVER SOUTHERN LAKE MICHIGAN WILL CONTINUE ONWARD TO LAKE HURON BY DAYBREAK MONDAY. A SECOND LOW PRESSURE OF 29.6 INCHES OVER THE SOUTHERN PLAINS WILL TRACK EAST TO THE MIDDLE MISSISSIPPI VALLEY MONDAY AFTERNOON AND UP THE OHIO VALLEY MONDAY NIGHT INTO TUESDAY...SLOWLY WEAKENING AS IT DOES SO. HIGH PRESSURE AVERAGING 30.3 INCHES CENTERED OVER ONTARIO WILL THEN BUILD INTO THE GREAT LAKES REGION TUESDAY AND WEDNESDAY. LMZ080-669-671-673-675-777-779-870-872-874-876-878-270930-

7 Day Forecast for Marine Location Near Whiting, IN
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location: 41.9, -87.31     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 270044
afdlot
area forecast discussion
national weather service chicago/romeoville, il
744 pm cdt Sun mar 26 2017

Update
735 pm cdt
the upper level trough is moving through overhead which has likely
caused the blossoming of light rain showers and drizzle currently
on radar. Decided to cover the increase of precip with ocnl
showers and areas of drizzle as not expecting any site to get
measurable precip. Expecting showers to end from southwest to
northeast as the trough continues northeast. Dry conditions are
still expected after midnight and through at least Monday morning
before more rain arrives.

The other change to the forecast was adding patchy fog through the
night. I am not expecting dense fog due to overcast skies. No
other sig changes were made to the going forecast.

Jee

Short term
204 pm cdt
tonight...

around sunrise tomorrow the area will be sitting between two
closely spaced low pressure systems, one over lake huron and
another moving into southwest missouri. The low to our northeast
would be the one that was responsible for the wet start to today,
but most of the activity with this system has already lifted
north and east of the area as of mid afternoon. The exception
would be the lingering activity in northwest indiana and some
isolated showers over illinois. This too would be expected to
taper off or lift farther northeast along with the departing low
this evening.

Under persistent overcast the area will begin to dry out a bit
overnight as winds turn northwest and dewpoints drop into the mid
40s, but this will be short lived before the upstream low reaches
the area tomorrow. There was some question about fog development
overnight with the relatively light winds, especially given the
recent rainfall, but the overall downward trend on low level
moisture makes this a tougher call. For now we will opt not to
mention fog except in the marine areas, but this will be
something to continue monitoring.

Lenning

Long term
314 pm cdt
Monday through Sunday...

a primarily cloudy week lies ahead thanks to existing clouds and
a continued series of upper lows passing over the region. It
looks wet for at least for a large part of the area Monday
afternoon and then at some point again during the latter half of
the week. Northeast to east winds will prevail given the surface
low reflections passing to our south, which combined with the
clouds means more subtle temperature changes than we have seen.

Monday morning will start the week appropriately cloudy with
possibly some fog as noted in the above discussion. The next upper
low located across western kansas this afternoon will track
eastward into the mid-mississippi valley by afternoon and up the
ohio river valley Monday night. This should remain fairly compact
but there is spread in solutions on how quickly this tracks
across the area. While this will bring rain into the CWA with high
confidence, due to its compact nature, the northward push of
moisture transport may be limited and thus the rain may cut off
somewhere in the northern cwa. Thunder potential is not great but
include a mention in the southeast given some elevated instability
and forcing for lift immediately ahead of the mid-level
circulation.

With trying to account for clouds and the rain spreading in
during the afternoon, have undercut guidance in northern areas
and near the lake, but overall confidence on temperatures Monday
is somewhat low and may still be too mild by quite a bit including
across the south.

North winds behind the system will prevail on Tuesday, as will
likely quite a bit of low-level cloud cover. So again
temperatures may be too mild even with undercutting. Given the
long fetch of cool flow off the lake, shoreline areas including
downtown chicago may top out only around 40. The brief window of
scattering cloud potential looks to be late in the day Tuesday or
Tuesday night, before mid/high clouds start moving in on
Wednesday.

The next closed low in the wave train is expected to take a
similar path as its predecessor, however be more broad and closed
and thus slower. Given that closed nature, confidence is low on
the speed of this and the exact path. Have generally gone close to
a model blend. Confidence is almost highest in it being cloudy.

Temperatures look to be at or slightly below normal Thursday and
Friday before a gradual climb this weekend, but that again depends
on the end of the week system speed, remnant clouds, etc.

Mtf

Aviation
For the 00z tafs...

main aviation forecast concern remains redevelopment of ifr/lifr
cigs overnight and persisting into Monday morning.

Weak surface low pressure center was over far northeast il between
ugn and ord early this evening. Milder air in southwest winds
south of the low track had allowed CIGS to improve into high
MVFR/vfr during the afternoon, though expect a gradual lowering
again from the west as winds diminish and become more west-
northwest through the evening. Extensive area ifr/lifr exists just
upstream across far western il/southern wi, and advection as well
as a gradual lowering with loss of daytime heating should result
in CIGS lowering to ifr and eventually lifr during the late
evening and overnight hours. Upper trough axis across the area
early in the evening may produce some spotty drizzle or very light
rain, though should be of little impact with drier air spreading
in aloft. Winds eventually veer to the northeast across the
terminals Monday, as a new area of low pressure moves into
downstate il from the southern plains. This will result in some
drying in the low levels, allowing CIGS to rise back into ifr and
eventually MVFR during the day. Light rain/showers are expected to
spread into the region during the mid-afternoon hours, though
heavier precipitation is expected to remain generally south of the
terminals. This light precip may redevelop patchy ifr CIGS during
the afternoon, but should then skirt southeast of the terminals
Monday evening. Northeast winds will increase a bit (12-15 kts)
Monday evening as well, while becoming more north- northeast.

Ratzer

Marine
327 pm cdt
low pressure will pass northeastward over the central part of the
lake this evening. Webcam imagery from the illinois and wisconsin
shores has indicated undulations in visibility, with dense fog at
times, and given that low track believe that more dense is
probable. Some of this will likely linger into Monday morning. The
low path also means wind direction at times could be variable
across the central part of the lake as it turns from southeast
late today to southwest and then to northwest late tonight.

The next in a series of surface lows will pass up the ohio river
valley Monday evening. Behind this, northerly winds will sharpen
Monday evening through Tuesday morning. This will bring small
craft advisory waves and possibly winds to the illinois and
indiana nearshores.

North, northeast, or east winds will prevail much of the week.

With the next low late in the week, these winds are presently
forecast to stiffen to 30 kt over the open water.

Mtf

Lot watches/warnings/advisories
Il... None.

In... None.

Lm... Dense fog advisory... Lmz740-lmz741-lmz742-lmz777-lmz779 until 9
am Monday.

Visit us at http://weather.Gov/chicago (all lowercase)
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHII2 - Chicago, IL 14 mi30 min WSW 11 G 12 53°F 51°F
CNII2 16 mi20 min SW 6 G 11 52°F
JAKI2 16 mi110 min WSW 7 53°F
OKSI2 17 mi110 min NW 2.9 54°F
CMTI2 - 9087044 - Calumet, IL 17 mi50 min SW 6 G 12 52°F 1011.7 hPa (+0.8)50°F
FSTI2 19 mi110 min WSW 16 53°F
BHRI3 - Burns Harbor, IN 20 mi70 min SW 9.9 G 13 53°F 1012.9 hPa
MCYI3 - Michigan City, IN 24 mi30 min SW 13 G 13 52°F 51°F
WHRI2 - Waukegan Harbor, IL 42 mi70 min ENE 1.9 G 2.9 38°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gary Regional Airport, IN20 mi75 minWSW 610.00 miOvercast55°F49°F84%1012.5 hPa

Wind History from GYY (wind in knots)
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Last 24hrSE7E7SE6SE7SE9SE10SE12SE9SE12SE8SE7S6SW9SW12SW12W10
G20
W10
G20
SW12W12SW12--SW10SW7SW4
1 day agoN9N8NW13N9N7N5NW6N6N5NE7CalmN4N5CalmCalmCalmW6NW4CalmCalmCalmCalmE7SE8
2 days agoS5SE3SE3CalmSE4S9S12
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SW23NW14
G27
NW9
G25
NE5N4N7N10

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
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GOES Local Image of Midwest    EDIT
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Wind Forecast for Chicago, IL (0,6,7,8)
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Ground Weather Radar Station Chicago, IL
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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.