Friday, August18, 2017 L-36.com


Marine Weather and Tides
Whiting, IN

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 6:01AMSunset 7:46PM Friday August 18, 2017 4:48 PM CDT (21:48 UTC) Moonrise 2:28AMMoonset 5:28PM Illumination 12% Phase: Waning Crescent; Moon at 26 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- 248 Pm Cdt Fri Aug 18 2017 Sheboygan Wi To Pentwater Mi South...
Tonight..West winds 10 to 20 kt becoming northwest 10 to 15 kt. Slight chance of showers and Thunderstorms this evening...then chance of showers and slight chance of Thunderstorms overnight. Waves 3 to 5 ft subsiding to 1 to 3 ft.
Saturday..Northwest winds 10 to 15 kt becoming variable 5 to 10 kt. Waves 1 to 3 ft.
Saturday night..South winds 10 to 15 kt becoming southwest. Waves 1 to 2 ft.
Sunday..Southwest winds 10 to 15 kt becoming south 10 to 20 kt. Waves 1 to 3 ft.
Sunday night..South winds 10 to 20 kt becoming southwest. Waves 2 to 4 ft.
Monday..South winds 10 to 20 kt. Chance of showers and Thunderstorms. Waves 2 to 4 ft.
Monday night..South winds 10 to 20 kt becoming southwest 15 to 25 kt. Chance of showers and Thunderstorms. Waves 2 to 4 ft.
Tuesday..Southwest winds 10 to 20 kt becoming west 15 to 25 kt. Showers and Thunderstorms likely. Waves 3 to 5 ft.
Wednesday..Northwest winds 15 to 25 kt diminishing to 10 to 20 kt. Waves 3 to 5 ft.
LMZ779 Expires:201708190330;;585398 FZUS63 KLOT 181948 GLFLM OPEN LAKE FORECAST for Lake Michigan National Weather Service Chicago/Romeoville IL 248 PM CDT Fri Aug 18 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 29.5 inches is centered just east of Lake Superior this afternoon and will lift east of James Bay Saturday and continue across northern Quebec Sunday. A ridge averaging 30.0 inches stretches along the Mississippi Valley this afternoon and will spread across much of the Midwest Saturday. Low pressure of 29.8 inches will form over the central Great Plains this weekend and remain there through Tuesday while another low of 29.5 inches moves from northern Manitoba Saturday to Quebec Tuesday as a trailing cold front sweeps south across Lake Michigan. LMZ080-669-671-673-675-777-779-870-872-874-876-878-190330-

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 181913
afdlot
area forecast discussion
national weather service chicago romeoville, il
213 pm cdt Fri aug 18 2017

Short term
209 pm cdt
main concerns for the near term forecast is with the coverage and
timing of showers and thunderstorms tonight.

Surface low pressure continues to pull away to the northeast of
the great lakes region this afternoon. While weak surface high
pressure ridging was developing east across the forecast area this
afternoon, attention turns to an area of surface low pressure
over southern ia, and an associated upper trough across the
eastern dakotas, mn and ia. This upper trough is progged to
amplify across the forecast area through early Saturday morning,
as fairly strong vort north of the fsd sux area digs southeast
into il. In response, the weak surface low over ia will develop
eastward along a modest low-level baroclinic axis, and is expected
to support the development of showers and a few thunderstorms
this evening into the overnight hours. Most of the high-res
convective allowing model guidance is in good agreement in
developing convection across southeast ia and into western il
through early this evening, then spreading it east across portions
of northern central il generally along south of the i-80 88
corridors. Guidance generally downplays showers farther north,
with lighter more scattered precip expected across far northern
il.

Short wave continues to dig into the southern lakes and ohio
valley early Saturday, with mid-level drying noted in forecast
soundings across the forecast area during the early morning hours.

Nearly all guidance has precip out of the forecast area by
sunrise. Fairly strong subsidence then develops in the wake of
this wave during the day, with h5 rises of 70+ meters by
afternoon. Broad area of weak high pressure reflects this at the
surface, setting up light winds and decreasing cloud cover (save
for some flat cu) by midday. Light winds and high pre-dawn rh
could produce some shallow patchy fog in a few spots prior to
sunrise. Low level thermal progs from models support highs in the
low-mid 80's in most spots, with a weak lake breeze keeping
readings a bit cooler along the lake michigan shore.

Ratzer

Long term
209 pm cdt
Saturday night through Friday...

hot, humid, and at times active weather expected Sunday though
midweek with cooler and drier conditions in place to close out the
upcoming work week as pattern transitions from zonal early in the
period to highly meridional late.

Sunday and Monday, broad area of low pressure will be in place
across the central great plains while 850mb thermal ridge is in
place out ahead of the low across portions of the mid to upper
mississippi valley. This will allow for continued hot and humid
conditions Sunday and Monday with afternoon highs well into the 80s
and dew points creeping towards or into the 70s. Forecast soundings
show decent capping in place Sunday and there is no notable
source of forcing, so expect primarily dry conditions through the
day Sunday.

Nocturnal convection appears favored Sunday night as low level jet
intensifies well to our west, and now the 12z GFS tries to bring a
convective complex across the local area Monday morning. NAM and
ecmwf paint a similar picture which raises concerns for pops and
cloud cover through the day Monday, including around the time of
the eclipse. Confidence in the details remains low at this
distance given the lack of any strong synoptic scale ascent and
models struggling with convective feedback generating low
amplitude waves over the area. Remnant showers and storms
somewhere in the region if not here locally seems plausible though
so have increased cloud cover and pops some through the day
Monday.

A strong upper wave is expected to begin digging into the upper
midwest Tuesday and continue to carve out a deep trough across the
great lakes through the day Wednesday. Showers and thunderstorms are
more favored on Tuesday in response to this wave and attendant
surface cold front that will push across the region later in the
day Tuesday. An expansive area of high pressure will build south
from the canadian prairies Thursday and Friday resulting in drier
weather to close out the week, but also cooler with afternoon
highs only in the low to mid 70s Thursday and Friday.

Deubelbeiss

Aviation
For the 18z tafs...

primary aviation forecast concerns are with timing and coverage of
showers thunderstorms tonight.

Surface low pressure continues to pull away to the northeast of
the great lakes region early this afternoon, while weak surface
high pressure develops eastward across the lower middle
mississippi valley. Morning MVFR stratocu continues to lift and
thin, withVFR conditions expected the remainder of the day. Winds
also continue to diminish with the approach of the surface ridge
and the weakening of the pressure gradient.

Attention turns to the west of the area this afternoon, on weak
low pressure over southwest iowa. This low will track east into
central il tonight, in association with a pair of mid-level
disturbances moving through the flow aloft. Warm advection ascent
across ia has been too dry to maintain showers for the most part,
though high-res guidance is in very good agreement in developing
convection across southeast ia late this afternoon as well as in
spreading it east into parts of central northern il this evening
and overnight. The trend in most of this guidance has been to
focus the best potential for stronger showers, and thunderstorms,
south of the terminals tonight. Weaker scattered showers are
possible however, in association with the mid-level trough.

Rain and lower clouds should clear the terminals by Saturday
morning. Broad high pressure spreads into the area from the west
during the day, with the weak gradient providing light, generally
north-northwesterly surface winds. While the weak gradient lowers
confidence in specific direction, speeds should be less than 10
kts. Weak lake breeze will also likely push into ord mdw by late
afternoon.

Ratzer

Marine
209 pm cdt
low pressure over the northern great lakes will lift north away
from the region while high pressure builds in from the west
tonight and tomorrow. Moderate winds in place this afternoon will
diminish overnight as the high builds over the region. Modest
west to southwest flow will persist across the northern half of
lake michigan Saturday peaking around 20 kt at times, while
lighter flow across the south end will allow for afternoon lake
breezes and variable onshore flow. South to southwest flow will
increase again Sunday as another low advances east across the
canadian prairies. A trailing cold front is expected to push south
across the lake through the day Tuesday turning winds northerly
in its wake.

Bmd

Lot watches warnings advisories
Il... None.

In... None.

Lm... None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHII2 - Chicago, IL 14 mi48 min WSW 14 G 17 80°F 60°F
JAKI2 16 mi108 min WSW 7 81°F
45177 16 mi168 min 77°F
OKSI2 17 mi108 min WNW 2.9 83°F
CMTI2 - 9087044 - Calumet, IL 17 mi48 min SSW 8 G 12 80°F 1010.1 hPa (-0.8)61°F
FSTI2 19 mi108 min NNW 15 81°F
BHRI3 - Burns Harbor, IN 20 mi68 min NNE 2.9 G 4.1 73°F 1011.2 hPa
45170 21 mi28 min Calm G 1.9 73°F 76°F2 ft64°F
MCYI3 - Michigan City, IN 24 mi48 min NNW 1 G 1.9 79°F 62°F
45174 24 mi28 min WNW 7.8 G 12 77°F 73°F1 ft64°F
45026 - St. Joseph, MI 37 mi28 min WNW 3.9 G 3.9 72°F 74°F3 ft1010.9 hPa60°F
WHRI2 - Waukegan Harbor, IL 42 mi68 min W 5.1 G 15 77°F
SJOM4 - St. Joseph, MI 45 mi48 min W 2.9 G 5.1 77°F 1012.5 hPa (+0.0)

Wind History for Calumet Harbor, IL
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G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gary Regional Airport, IN20 mi63 minW 1015.00 miA Few Clouds82°F57°F42%1010.8 hPa

Wind History from GYY (wind in knots)
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Last 24hrW20
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--SW12SW12W15W11
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W7W9W7W7W6W9W7W12W10W12W11W12W10W12W12W10
1 day agoS7S4S54SE4S4S6SE6S7S6
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S4S5S5S5S8S5S9S5SW13SW15SW10
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2 days agoNE13NE9NE9NE8NE6NE9NE6NE5NE5NE3NE4E3CalmCalmCalmCalmSE4SE5SE5S3SE7S8SE10SE7

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 Midwest    EDIT
Geos

Wind Forecast for Chicago, IL (17,4,5,8)
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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.