Thursday, April2, 2020
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Marine Weather and Tides
Whiting, IN

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:28AMSunset 7:19PM Thursday April 2, 2020 8:26 PM CDT (01:26 UTC) Moonrise 12:46PMMoonset 3:20AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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:202004030315;;471929 Fzus63 Kmkx 022027 Glflm Open Lake Forecast For Lake Michigan National Weather Service Milwaukee/sullivan Wi 327 Pm Cdt Thu Apr 2 2020 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.. Fairly quiet across lake michigan for the next few days. Light southeasterly winds tonight will continue into Friday before an area of low pressure around 29.9 inches works it way into the region late Friday into Saturday. This will bring increased rain chances and a cold front across the lake by Saturday morning. Winds are expected to increase to around 20-25 knots and shift to the northwest behind the cold front Saturday morning/afternoon. Winds will then weaken later Saturday as high pressure builds into region for the second half of the weekend. && lmz080-669-671-673-675-777-779-870-872-874-876-878-030315- 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- 327 pm cdt Thu apr 2 2020 sheboygan wi to pentwater mi south...
Tonight..Northeast winds 5 to 10 kt becoming east. Waves 1 ft or less.
Friday..Southeast winds 5 to 10 kt increasing to 10 to 15 kt. Waves 1 ft or less.
Friday night..Southeast winds 10 to 15 kt becoming south. Chance of rain. Waves 1 to 2 ft.
Saturday..Northwest winds 15 to 25 kt becoming north 10 to 20 kt. Rain likely in the morning, then chance of rain in the afternoon. Waves 3 to 5 ft.
Saturday night..North winds 10 to 20 kt diminishing to 5 to 10 kt overnight. Chance of rain in the evening. Waves 2 to 4 ft.
Sunday..Northeast winds 10 to 15 kt becoming north 5 to 10 kt. Waves 1 to 2 ft.
Sunday night..Northeast winds 5 to 10 kt becoming southeast. Waves 1 to 2 ft.
Monday..Southeast winds 10 to 15 kt becoming south. Chance of rain. Waves 1 to 3 ft.
Tuesday..South winds 10 to 15 kt becoming southwest 10 to 20 kt. Chance of rain. Waves 2 to 4 ft.
LMZ779


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 022343 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 643 PM CDT Thu Apr 2 2020

SHORT TERM. 219 PM CDT

Through Friday .

Temperatures are warming nicely (to around 60) across inland areas this afternoon under mostly sunny skies. While skies have been mostly sunny, expect higher level cloudiness to increase over the area later this afternoon in advance of our next weather system. Skies will thus become mostly cloudy across the area for tonight. A weak mid-level disturbance, noted in the GOES 16 water vapor imagery over northern MO and southern IA, is expected to shift across our area tonight. As it does so, we could have a few light showers develop over northern IL tonight. Overall, this will not be a big deal, but we do have some low end chances for rain overnight, primarily across northern IL.

On Friday we will be awaiting the arrival of a cold front approaching western IL late in the day. Since this front will not move into our western areas until Friday evening, it appears most, if not all of the day Friday will be precipitation free for the area. Instead, it appears the primary threat for rain should hold off until Friday evening. While it is looking dry, there is likely to be more cloud cover around. In spite of this, warmer conditions are expected thanks to a thermal ridge featuring 925 mb temperatures around 11C advecting northward ahead of the approaching front. This should yield afternoon high temperatures into the mid 60s inland from Lake Michigan. Close to the lake, however, onshore winds are likely keep temperatures in the upper 40s to low 50s.

KJB

LONG TERM. 310 PM CDT

Friday Night through Thursday .

A slow moving cold frontal passage will bring rain showers to the area Friday night into Saturday, followed by quiet conditions through Sunday night. Next work week will be mild and unsettled with thunderstorm chances in the first part of the week and then turn cooler later in the week.

Friday Night through Sunday Night:

A narrow plume of anomalous PWATs (about 150-200% of normal) for the time of year of a bit upwards of 1" will be drawn northward with the approach of slow moving cold front from the northwest. A weak frontal wave may initially slow the eastward progress of the front and associated showers. Lower and mid-level convergence and transient frontogenesis along with very modest height falls will drive primarily anafrontal (post-frontal) rain showers. Confidence is high in rain occurrence for the Friday night period, so indicate categorical PoPs gradually translating east-southeastward. Can't completely rule out some embedded thunder, however it appears sub-slight chance mention as instability will be very meager. Relatively steep lapse rates will maximize above 600 mb, so lifting would have to be high up in the column. With probabilistic thunder products sub-mentionable over the area and better chances off to the west/southwest of west/southwest CWA area, opted to remove thunder mention.

There may be some embedded moderate rainfall rates depending on if f-gen is more than transient, with upside potential in rainfall amounts in a narrow swath given presence of well above normal column moisture. NAM hints at this sort of potential, though guidance is mixed. For now, WPC QPF totals around 1/4" appear reasonable and will be able to add detail as needed with subsequent updates. Expansive high pressure ridge building in from the northwest will give the front and associated rain/showers an extra push during the day on Saturday, so there should be fairly quick drying from northwest to southeast across Illinois counties. As such, added some temporal resolution to the PoP grids. Saturday will be 10-15 degrees cooler than Friday away from the lakeshore in the lower to mid 50s and only mid-upper 40s lakeside as winds turn north to northeast behind the front. It appears that Saturday evening through Sunday night will then be dry (minor exception of last showers exiting far southeast early Sunday evening). Sunday will feature partly cloudy skies and moderate back to the mid- upper 50s inland, but stay chilly lakeside in the 40s under continued northeast surface flow.

Castro

Monday through Thursday:

Medium range guidance continues to develop a long wave trough along the west coast early next week, with a broad downstream upper ridge across the eastern CONUS. With quick southwesterly flow aloft, surface low pressure is progged to develop out of the Plains and progress northeast to the western Great Lakes region through mid-week. In the process, a warm front lifts across the region, bringing warmer (potentially 70+ degrees on Tuesday) and more humid air into the region. Shower and thunderstorm potential also increases, with a few periods of unsettled weather likely Monday into early Wednesday.

The pattern is rather messy and thus uncertain as depicted in the guidance and ensembles, with a few to several short-waves traversing the area and large variance on timing. Surface pattern and timing of waves of showers/storms and associated cloud cover will also dictate exactly how mild it gets and possible lakeside cooling. It will take some time to sort out specific details, so confidence is on the low side. Depending on the timing and overall evolution, there may be overlap of stronger flow aloft with sufficient moisture and instability to bring a stronger thunderstorm risk somewhere over the region. It appears that initial cold front passage will occur Tuesday night into Wednesday, possibly followed by a reinforcing shot of cooler air to close out the period. Some guidance indicates a rather stout cold shot for this time of year.

Ratzer/Castro

AVIATION. For the 00Z TAFs .

There are no major aviation weather concerns over the next 24 to 30 hours outside of a brief window for some showers overnight tonight.

Light east to southeasterly winds will prevail through the TAF period, although a somewhat more chaotic/variable wind field may develop as an area of light showers moves northeast across the region late tonight/very early Friday morning. While we are currently seeing several in-cloud lightning flashes across north- central Missouri, all indications point to a lack of electrification potential as this activity spreads farther northeast. Anticipate that any lingering showers should move out of the region or fizzle by daybreak Friday, leaving behind a mid- level cloud deck through the day. Could see some occasional southeast wind gusts to 15 kts develop Friday afternoon with heating.

The next weather feature of interest will be a sharp cold front which--at this time--looks to move through the Chicago-area terminals just outside the extended ORD/MDW TAF window. Cigs should be on a quick downward trend Friday evening, but the better chances for precipitation and IFR cigs looks to occur right around or just after 04.06z and have left this mention out of the current TAFs as a result.

Carlaw

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 mi37 min S 1.9 G 2.9 42°F 38°F
CNII2 16 mi42 min Calm G 4.1 41°F 34°F
CMTI2 - 9087044 - Calumet, IL 17 mi57 min E 4.1 G 6 41°F 1019 hPa37°F
OKSI2 17 mi147 min SE 4.1 G 5.1 46°F
MCYI3 - Michigan City, IN 24 mi167 min NE 9.9 G 11 41°F 39°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gary Regional Airport, IN20 mi3.7 hrsNE 1010.00 miA Few Clouds52°F28°F41%1020 hPa

Link to 5 minute data for KGYY

Wind History from GYY (wind in knots)
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Last 24hrNE5NE5NE3NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE8NE8NE8NE9NE10
1 day agoN10N9N15N13N9N11N12N7N9NW10NW10
G15
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2 days agoNE6E9SE3SE3NE3NE3E5NE7NE8N8N9N8
G14
N10N12N6N8N5N6N10N10N10N10N14N9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of Midwest    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.
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Wind Forecast for Chicago, IL (21,6,7,8)
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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 numerous 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.