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Marine Weather and Tides
Version 3.4 |
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name. |
| Sunrise 7:04AM | Sunset 6:08PM | Tuesday October 16, 2018 8:30 PM CDT (01:30 UTC) | Moonrise 2:12PM | Moonset 11:53PM | Illumination 50% |  |
LMZ741 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 250 Pm Cdt Tue Oct 16 2018
.small craft advisory in effect through Wednesday afternoon...
Tonight..Southwest winds 20 to 30 kt through early evening, then shifting northwest 15 to 25 kt overnight. Partly cloudy. Waves 2 to 4 ft.
Wednesday..Northwest winds 20 to 25 kt. Sunny. Waves 2 to 4 ft.
Wednesday night..Northwest winds 10 to 20 kt. Mostly clear. Waves 2 to 4 ft.
Thursday..West winds 5 to 10 kt becoming southwest 10 to 15 kt in the afternoon. Sunny. Waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
.small craft advisory in effect through Wednesday afternoon...
Tonight..Southwest winds 20 to 30 kt through early evening, then shifting northwest 15 to 25 kt overnight. Partly cloudy. Waves 2 to 4 ft.
Wednesday..Northwest winds 20 to 25 kt. Sunny. Waves 2 to 4 ft.
Wednesday night..Northwest winds 10 to 20 kt. Mostly clear. Waves 2 to 4 ft.
Thursday..West winds 5 to 10 kt becoming southwest 10 to 15 kt in the afternoon. Sunny. Waves 1 to 3 ft subsiding to 1 ft or less in the afternoon.
LMZ741 Expires:201810170330;;285940
FZUS53 KLOT 161950
NSHLOT
NEARSHORE MARINE FORECAST
National Weather Service Chicago/Romeoville IL
250 PM CDT Tue Oct 16 2018
For waters within 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 waves, along with the
average height of the highest 10 percent of the waves which will
occasionally be encountered.
LMZ740>742-170330-
7 Day Forecast for Marine Location Near Evanston, IL
Hourly EDIT Helplocation: 42.03, -87.69 debug
Area Discussion for - Chicago, IL
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 klot 162329 afdlot area forecast discussion national weather service chicago romeoville, il 629 pm cdt Tue oct 16 2018 Short term 215 pm cdt through Wednesday... relatively warmer, but gusty southwest winds this afternoon will ease this evening with the approach of a cold front clipper system to our north. Precipitation has been fairly scarce with the front and largely confined across the upper great lakes, and any additional precipitation will remain north and across the east side of lake michigan. While temperatures will drop into the lower to middle 30s, winds do remain elevated such that frost will likely be more patchy than anything, and much less coverage tonight compared to last night and what will be expected Wednesday night. Behind the front we could see some residual clouds in the morning, but then just expect a cool and breezy day with northwest winds in place. Highs will struggle to reach 50 in spite of the sunshine. Kmd Long term 155 pm cdt Wednesday night through Tuesday... a blocky upper ridge is expected to persist over the pacific northwest midweek through early next week with downstream troughing resulting in a prolonged period of below normal temperatures in the midwest. Several stronger shortwaves will dig across the great lakes region through the period resulting in some minor undulations in temps and provide a couple periods with low precip chances. Wednesday night into Thursday will be quiet and cool under the influence of a broad ridge over the region. A strong shortwave is progged to dig into the upper midwest on Friday driving a cold front across the local area Friday evening and overnight. Breezy southwest winds will be in place ahead of the front. Best upper level support stays well to our north Friday, and there may initially be dry low levels to overcome making precip timing and intensity a bit unsure at this distance, but there is at least a |
chance for scattered showers with the front on Friday. Strong cold air advection into the region Friday night into Saturday will help to drive steep low level lapse rates. The combination of efficient mixing with a tight pressure gradient over the region will result in another windy day. Forecast soundings from the GFS show top of the channel winds of around 40kt and suggest the potential for frequent wind gusts in excess of 30 mph. Meanwhile, a second and weaker shortwave digs across the area on Saturday and may produce widely scattered diurnally favored showers. High pressure builds over the region Sunday and early Monday, but another cold front is expected to pass over the area Monday night into Tuesday. Deubelbeiss Aviation For the 00z tafs... 629 pm... Only forecast concern this period are the winds. Southwest winds 10-15kts will slowly turn westerly this evening and then shift northwesterly overnight as a cold front moves across the area. There may be some periodic gusts this evening. Speeds will increase Wednesday morning with gusts 20-25kt through mid afternoon. Speeds gusts will diminish quickly with sunset Wednesday evening. There is an expansive area of 3-6kft CIGS across the upper midwest behind the cold front. This cloud cover may spread across the area during the overnight hours and persist through late Wednesday morning. If bkn ovc CIGS develop... They may lower to near 3kft but confidence is currently low. Cms Lot watches warnings advisories Il... None. In... None. Lm... Small craft advisory... In nearshore waters until 10 pm Wednesday. Small craft advisory... Il nearshore waters until 3 pm Wednesday. Visit us at http: weather.Gov chicago (all lowercase) follow us on facebook... Twitter... And youtube at: |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| FSTI2 | 4 mi | 90 min | SW 8 | 54°F | ||||
| 45174 | 7 mi | 20 min | SW 9.7 G 14 | 56°F | 58°F | 1 ft | 41°F | |
| CHII2 - Chicago, IL | 10 mi | 30 min | WSW 19 G 21 | 57°F | 35°F | |||
| CNII2 | 13 mi | 15 min | S 6 G 9.9 | 54°F | 32°F | |||
| JAKI2 | 18 mi | 90 min | WSW 6 G 9.9 | 55°F | ||||
| CMTI2 - 9087044 - Calumet, IL | 22 mi | 30 min | SSW 5.1 G 9.9 | 53°F | 1016.8 hPa (+0.9) | 36°F | ||
| WHRI2 - Waukegan Harbor, IL | 24 mi | 50 min | WSW 8.9 G 12 | 54°F | ||||
| 45186 | 24 mi | 30 min | W 7.8 | 54°F | 54°F | 1 ft | ||
| 45187 | 32 mi | 30 min | 53°F | 53°F | 1 ft | |||
| BHRI3 - Burns Harbor, IN | 39 mi | 50 min | SSW 8.9 G 11 | 54°F | 1017.6 hPa | |||
| KNSW3 - Kenosha, WI | 39 mi | 30 min | SW 8 G 9.9 | 53°F | 1015.6 hPa (+1.4) | |||
| 45170 | 43 mi | 20 min | WSW 19 G 27 | 55°F | 59°F | 4 ft | 40°F | |
| MCYI3 - Michigan City, IN | 46 mi | 30 min | S 17 G 19 | 52°F | 33°F |
Wind History for Calumet Harbor, IL
(wind in knots) EDIT (on/off) Help| 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | -12 PM | -12 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | SW | S | SW | SW | SW | SW | SW G7 | SW G10 | SW G8 | S | S | SW G10 | SW G13 | SW G17 | SW G19 | SW G23 | SW G20 | SW G16 | SW G14 | SW G11 | SW G9 | SW G10 | ||
| 1 day ago | NW G9 | W G6 | NW | W | NW G7 | W G7 | W G5 | W G12 | W G15 | W G12 | NW G12 | W G12 | W G13 | W G13 | W G14 | W G13 | SW G10 | W G11 | W G14 | SW G13 | W G12 | W G4 | SW | |
| 2 days ago | S G9 | S G10 | S | S G9 | S G8 | S | S | S | S | S | S | SE | S | S G10 | SE G11 | S G12 | S G10 | SW G6 | SW G11 | SW G8 | -- | W G6 | W | NW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Chicago / Wheeling, Pal-Waukee Airport, IL | 12 mi | 38 min | WSW 5 | 10.00 mi | Fair | 54°F | 34°F | 47% | 1017.4 hPa |
| Chicago, Chicago-O'Hare International Airport, IL | 12 mi | 39 min | SW 9 | 10.00 mi | A Few Clouds | 54°F | 34°F | 47% | 1017.1 hPa |
| Chicago, Chicago Midway Airport, IL | 17 mi | 37 min | WSW 8 | 10.00 mi | A Few Clouds | 52°F | 34°F | 50% | 1017.8 hPa |
Wind History from PWK (wind in knots)
| 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | SW | SW | Calm | W | S | SW | Calm | S | SW | SW | SW | SW | SW G17 | SW G23 | SW G26 | SW G25 | SW G23 | SW G26 | SW G26 | W G22 | SW G21 | W G18 | W | SW |
| 1 day ago | W | NW | NW | NW | NW | NW | NW G17 | NW G20 | NW | NW | NW | NW | W | NW G19 | NW | NW | NW G18 | W G19 | W G16 | NW | W G20 | W | W | W |
| 2 days ago | SW | S | S | S | NW | Calm | Calm | Calm | S | S | Calm | Calm | Calm | S | S | S | SW | SW | S | SW | W | W | NW | NW |
Tide / Current Tables for
EDIT RT Ports Option Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
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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 (21,6,7,8)
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Ground Weather Radar Station Chicago, IL
(on/off) Help
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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. |