Friday, August23, 2019 L-36.com


Marine Weather and Tides
Dune Acres, IN

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:02AMSunset 7:37PM Friday August 23, 2019 9:02 AM CDT (14:02 UTC) Moonrise 11:57PMMoonset 1:49PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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 Expires:201908232115;;084685 Fzus63 Kmkx 231345 Glflm Open Lake Forecast For Lake Michigan National Weather Service Milwaukee/sullivan Wi 845 Am Cdt Fri Aug 23 2019 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.. High pressure of 30.3 inches centered just north of lake superior this morning will slowly slide eastward into the weekend, reaching maine by Sunday morning. North to northeast winds today will become easterly Saturday, with a southeast component by Sunday as the high moves on. Winds will be breezy at times through Sunday. Southeast winds and waves will pick up Monday between an approaching low and the departing high. Lmz080-669-671-673-675-777-779-870-872-874-876-878-232115- 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- 845 am cdt Fri aug 23 2019 sheboygan wi to pentwater mi south...
Rest of today..Northeast winds 10 to 15 kt becoming north 10 to 20 kt. Waves 2 to 4 ft.
Tonight..North winds 10 to 20 kt veering to east. Waves 2 to 4 ft.
Saturday..East winds 10 to 20 kt becoming northeast 10 to 15 kt. Waves 2 to 4 ft.
Saturday night..East winds 10 to 15 kt becoming southeast. Waves 2 to 4 ft.
Sunday..Southeast winds 10 to 15 kt increasing to 10 to 20 kt. Waves 1 to 3 ft.
Sunday night..Southeast winds 10 to 20 kt. Waves 1 to 3 ft building to 2 to 4 ft.
Monday..Southeast winds 10 to 20 kt becoming south 15 to 25 kt. Chance of showers and Thunderstorms. Waves 4 to 6 ft occasionally to 8 ft.
Tuesday..West winds 10 to 20 kt. Waves 3 to 5 ft.
LMZ779


7 Day Forecast for Marine Location Near Dune Acres, IN
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location: 41.87, -87.2     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 231030
afdlot
area forecast discussion
national weather service chicago romeoville, il
530 am cdt Fri aug 23 2019

Short term
212 am cdt
through tonight...

pleasant and quiet apparent weather for the area today, although
breezy northeast winds near lake michigan will continue dangerous
swimming conditions due to high waves and rip currents.

Satellite water vapor imagery this morning reveals subsidence
and drying in the mid and even lower levels moving in over the
lower great lakes from the north. Resulting surface high pressure
of 1025 mb over central ontario this morning will gradually expand
southward through the day. Much of the CWA and lake michigan will
remain in the gradient around this, with a tightened clockwise
flow and thus northeast winds with occasional gusts to 20 mph.

Near the lake front, the sustained winds at times will approach 20
mph, and these will help to sustain the ongoing high wave action.

While this is not to the level of lakeshore flooding, some higher
waves can cause dangers for those walking near the lakeshore. The
perpendicular flow to much of the shore will continue the rip
current risk and wind direction and speed look enough for this
threat to go into this evening. There may be a brief lull late
this morning in wave action due to slightly veered winds, but that
looks temporary.

Otherwise today should realize high temperatures at or a couple
degrees below yesterday given the cold advection at the top of the
mixed layer that has occurred in the past 12 hours and will
continue through midday. With a clear sky by tonight and weakening
flow, though maybe not completely calm until late, low
temperatures look to drop into the lower 50s in outlying areas and
suspect a few of the typical cool spots touch upper 40s.

Mtf

Long term
321 am cdt
Saturday through Thursday...

a large, sprawling area of surface high pressure will be centered
over the upper great lakes region Saturday morning and will slowly
slide east, centered over new england by Sunday morning. Conditions
across the local area will be unseasonably cool and dry, with highs
on Saturday in the middle to upper 70s and upper 70s to lower 80s
for Sunday. Given the continental-polar origin of the associated air
mass, dewpoints will also be relatively low, mainly in the middle
50s. Overall, this is expected to result in pleasant weather with
ample across the area.

For Sunday night and into early next week, the longer range model
guidance remains in good agreement with a well defined southern
stream shortwave lifting through the missouri valley and into
central illinois late Sunday night and Monday morning and lift
across southern lake michigan and into lower michigan Monday night.

Also, a northern stream short wave is expected to track across
northern plains canadian border area while dragging a cold front
across the upper mississippi valley. During this period from Sunday
night through Tuesday, the large sfc high will move off the new
england coast. This will set up a period of unsettled weather
across the region, with periods of showers and thunderstorms
expected as a return flow of deep layer moisture sets up as the sfc
high moves east and the double-barreled system approaches from the
west and crosses the region. Conditions should settle down as the
system moves off to the east and high pressure builds out of the
central plains and across the middle mississippi valley. Another
northern stream shortwave rotating around the base of a deep upper
low expected to develop over central canada by mid week could bring
the next chance for some scattered showers or thunderstorms for
Wednesday afternoon into Wednesday night.

Aviation
For the 12z tafs...

for the chicago area tafs today the main story is northeast
winds, with high confidence in these being 10+ kt from 14z-01z.

High pressure gradually building into the upper great lakes will
continue to result in northeast winds over the area. Early this
morning there is 20 kt flow just 2,000 ft aloft per radar vwp.

This is indication there will very likely be some gusts to that
magnitude especially mid-late morning as mixing ensues and before
that channel of winds eases in speed some. There will be
fluctuation in wind direction between mainly 030 and 060 degrees
at chicago airports today. Winds will gradually ease in the 00z-
03z time similar to last evening.

Mtf

Lot watches warnings advisories
Il... Beach hazards statement... Ilz006-ilz014 until 4 am Saturday.

In... Beach hazards statement... Inz001-inz002 until 4 am Saturday.

Lm... Small craft advisory... Nearshore waters
until 4 am Saturday.

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
45170 15 mi33 min E 7.8 G 9.7 65°F 74°F3 ft53°F
BHRI3 - Burns Harbor, IN 16 mi45 min E 4.1 G 8.9 64°F 1022.7 hPa
MCYI3 - Michigan City, IN 18 mi43 min E 7 G 7 64°F 51°F
CHII2 - Chicago, IL 20 mi43 min NE 15 G 16 69°F 56°F
CMTI2 - 9087044 - Calumet, IL 20 mi45 min ENE 8.9 G 12 68°F 1021.5 hPa57°F
JAKI2 21 mi123 min E 6 G 14 69°F
45177 22 mi123 min 74°F1 ft
CNII2 22 mi33 min NE 11 G 16 69°F 53°F
OKSI2 23 mi123 min SE 7 G 13 70°F
FSTI2 25 mi123 min ENE 19 69°F
45174 30 mi33 min ENE 12 G 18 74°F4 ft1021.8 hPa
45026 - St. Joseph, MI 32 mi33 min ENE 5.8 G 7.8 62°F 72°F2 ft1022.6 hPa51°F
SJOM4 - St. Joseph, MI 41 mi63 min ENE 2.9 G 5.1 62°F 1023 hPa (+1.7)
45186 47 mi43 min ENE 12 G 16 69°F 73°F3 ft

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gary Regional Airport, IN21 mi2.3 hrsE 710.00 miPartly Cloudy64°F55°F73%1021.3 hPa
Michigan City Municipal Airport, IN23 mi88 minN 010.00 miFair57°F53°F88%1022.3 hPa

Link to 5 minute data for KGYY

Wind History from GYY (wind in knots)
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Last 24hrE5E8E6E11E9E10NE14
G24
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NE12NE11
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E9E8E7E5E8E7E6E6
1 day agoW4W7W7W8W14W12W16W15
G25
CalmNW7NW6N11N6N5N4N5N5CalmNE5CalmCalmCalmSE4E5
2 days agoS4S4S4W12
G34
S64CalmE9SE5SE43CalmCalmCalmW4SW3SW3CalmCalmCalmCalmCalmW5W5

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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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (10,2,3,4)
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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.