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Marine Weather and Tides
Version 3.4 |
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. 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 7:09AM | Sunset 6:00PM | Tuesday October 22, 2019 9:38 AM CDT (14:38 UTC) | Moonrise 12:12AM | Moonset 3:16PM | Illumination 35% |  |
LMZ741 Expires:201910221545;;088154 Fzus53 Klot 220806 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 306 Am Cdt Tue Oct 22 2019 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>742-221545- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 306 Am Cdt Tue Oct 22 2019
.gale warning in effect through this evening...
Today..Southwest gales to 35 kt with occasional gusts to 40 kt. Scattered showers. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the afternoon.
Tonight..West winds to 30 kt, with occasional gales to 35 kt in the evening. Mostly cloudy in the evening then clearing. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight.
Wednesday..Southwest winds 10 to 20 kt. Slight chance of showers in the afternoon. Waves 1 to 3 ft.
Wednesday night..West winds 5 to 10 kt becoming northwest after midnight. Chance of showers in the evening. Waves 1 ft or less.
.gale warning in effect through this evening...
Today..Southwest gales to 35 kt with occasional gusts to 40 kt. Scattered showers. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the afternoon.
Tonight..West winds to 30 kt, with occasional gales to 35 kt in the evening. Mostly cloudy in the evening then clearing. Waves 2 to 4 ft subsiding to 1 to 3 ft after midnight.
Wednesday..Southwest winds 10 to 20 kt. Slight chance of showers in the afternoon. Waves 1 to 3 ft.
Wednesday night..West winds 5 to 10 kt becoming northwest after midnight. Chance of showers in the evening. Waves 1 ft or less.
LMZ741
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 221146 afdlot area forecast discussion national weather service chicago romeoville, il 646 am cdt Tue oct 22 2019 Short term 246 am cdt through tonight... impressive look at the mid latitude cyclone pinwheeling around the upper midwest on satellite early this morning with its expansive warm and dry conveyor belt structure. The surface low is reaching its modeled strength around 987 mb with the cold front now shifted through and a bent back occlusion secondary cold advection area back across iowa. We will get another surge of winds with the increasing low level jet to the west along with the cold advection around and shortly after daybreak when the tighter pressure gradient and stronger pressure couplet will pass overhead. Gusts to 40 to 45 kt have been observed across western iowa in this stronger gradient that will shift into portions of our area today. The best pressure couplet will largely graze the area, but areas along and northwest of chicago will get into the more favored wind axis. We don't feel expanding the advisory farther south and east is warranted given that the low will eventually start to fill and lift north. So while a few advisory level gusts (45 mph + ) may occur outside of the advisory, they appear to be brief. The period of strongest winds does seem to be centered on the morning hours. Meanwhile, the comma cloud shield consists of showers that will likely impact many areas today, and will make for a cool, cloudy, windy, and occasionally damp day. As these showers roll through they will also locally enhance the winds that are able to make it to surface and therefore expect this potential today when you are under any precipitation. The low will pull away from the region tonight and weaken as it does so. When this occurs, warm advection out ahead of a fast moving system across the northern plains will drive warm front into northern il and northwest in early Wednesday which will become the focus for additional rain chances. Kmd Long term 246 am cdt Wednesday through Monday... a period of relatively quiet weather compared to the past 24 hours is expected into this weekend. Wednesday through Thursday night: a mid-level trough axis rotating around the remnant deep cyclonic flow from the current system will phase with a quick-moving north pacific shortwave trough over the northern great plains early Wednesday. This wave will brush the cwa just to the north Wednesday evening. Low-level WAA fgen ahead of this wave will support a band or two of light rain primarily north of i-88, but most likely closer to and north of the wisconsin state line, late Wednesday afternoon and evening. A cold front behind the wave will shift south across much of the cwa late Wednesday night into Thursday morning before stalling over or just south of the far southern cwa. Continued fgen along with some increase in low-level moisture transport into the region will result in additional bands of light rain Thursday afternoon and night. The southeast third of the CWA roughly south of a line from pontiac to |
kankakee to valparaiso may reside under one of these light rain bands late Thursday afternoon into Thursday night. Friday and Saturday: surface and mid-level ridging will quickly build into the region on Friday, with the surface ridge crossing all or at least a portion of the CWA Friday night. This will set the stage for a potential freeze across a decent portion of the cwa, with lows in the low 30s to locally upper 20s. WAA will ensue on Saturday with increasing southerly winds, but conditions should remain dry through the day. Sunday and Monday: guidance begins to vary considerably with the evolution of the southern great plains western gulf of mexico low late in the week. The ECMWF cmc bring this system quickly northward across the area Saturday night and Sunday while the GFS ejects the system well southeast of the area on Saturday. However, guidance does agree to some extent that deep troughing will begin to form over the western CONUS early next week, setting the stage for a period of active weather to close out october. Kluber Aviation For the 12z tafs... primary concerns through this period are mainly strong SW winds and MVFR ceilings today. An increasing pressure gradient on the southern flank of a strong low pressure system near western lake superior will pivot across northern illinois and northwest indiana through this afternoon. Sw wind gusts to around 35 knots will continue through the morning hours. Wind direction will likely settle at around 230 degrees during this time before gradually veering to around 250 by late afternoon. A few gusts to 40 knots are possible at all sites this morning, primarily at rfd. Winds will slowly diminish during the afternoon, but remain gusty through tonight. MVFR ceilings are spreading across the area this morning and will continue through much of the day before becoming sct or lifting into vfr levels this evening. Isolated to scattered -shra will accompany the MVFR ceilings for a period this morning. Ceilings may reach low- end MVFR levels with the -shra. Kluber Marine More gales are expected today with no new changes to the gale headline. Frequent gale gusts to 35 knots are expected into this afternoon, with a few gusts to 40 knots possible along the illinois nearshore. Winds will gradually diminish through the afternoon into this evening, with gales possible ending earlier than the current ending time of 9pm cdt. Rodriguez kluber Lot watches warnings advisories Il... Wind advisory... Ilz003-ilz004-ilz005-ilz006-ilz008-ilz010-ilz011- ilz012-ilz019-ilz020 until 3 pm Tuesday. In... None. Lm... Gale warning... Nearshore waters until 9 pm Tuesday. 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 |
| 45174 | 7 mi | 39 min | SW 21 G 33 | 52°F | 4 ft | 997.9 hPa | ||
| CHII2 - Chicago, IL | 10 mi | 39 min | SW 33 G 38 | 50°F | 43°F | |||
| CNII2 | 13 mi | 24 min | SW 14 G 21 | 48°F | 41°F | |||
| CMTI2 - 9087044 - Calumet, IL | 22 mi | 51 min | SW 15 G 25 | 50°F | 1000.8 hPa | 42°F | ||
| 45186 | 24 mi | 39 min | SSW 19 G 25 | 47°F | 51°F | 2 ft | ||
| KNSW3 - Kenosha, WI | 39 mi | 39 min | SW 18 G 27 | 48°F | 998 hPa (+1.4) | |||
| 45170 | 43 mi | 29 min | SW 19 G 27 | 50°F | 52°F | 4 ft | 44°F | |
| MCYI3 - Michigan City, IN | 46 mi | 39 min | SSW 19 G 24 | 49°F | 41°F |
Wind History for Calumet Harbor, IL
(wind in knots) EDIT (on/off) Help| 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 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 | |
| Last 24hr | SE G28 | SE G27 | SE G23 | S G27 | S G21 | S G21 | S G19 | SW G19 | SW G15 | SW G23 | SW G17 | SW G19 | S G17 | S G16 | S G19 | S G17 | S G16 | S G23 | S G20 | S G21 | SW G22 | SW G26 | SW G22 | SW G26 |
| 1 day ago | N G11 | N G9 | N G8 | N G7 | NE G6 | NE | NE G6 | E | NE G7 | NE | NE | NE | NE | NE | NE | NE | NE | N | SE G10 | SE G16 | SE G12 | SE G18 | SE G19 | SE G28 |
| 2 days ago | S G12 | S G14 | S G13 | SE G17 | SE G13 | S G16 | S G14 | S G11 | S | SE | S | S | S | S | SW | SW | SW | SW | SW | W G6 | W G8 | NW | N | N G10 |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Chicago / Wheeling, Pal-Waukee Airport, IL | 12 mi | 47 min | SW 15 G 29 | 10.00 mi | Overcast | 49°F | 41°F | 74% | 1000 hPa |
| Chicago, Chicago-O'Hare International Airport, IL | 12 mi | 48 min | SW 17 G 26 | 10.00 mi | Overcast | 47°F | 41°F | 80% | 1000.3 hPa |
| Chicago, Chicago Midway Airport, IL | 17 mi | 46 min | WSW 20 G 30 | 9.00 mi | Light Rain and Breezy | 50°F | 41°F | 71% | 1001.1 hPa |
Link to 5 minute data for KPWK
Wind History from PWK (wind in knots)
| 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 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 | |
| Last 24hr | SE G29 | SE G19 | S G32 | S G33 | S G33 | SW G26 | S G23 | SW G25 | SW G26 | SW G19 | SW G29 | SW G22 | S G18 | S G22 | S | S G25 | S G25 | S G28 | S G27 | SW G38 | SW G26 | SW G31 | SW G27 | SW G29 |
| 1 day ago | NW | N | NE | E | NE | NE | E | NE | NE | NE | E | E | E | E | E | E | NE | E | NE | E | E | E | SE G20 | E G24 |
| 2 days ago | S | S | S | S | S | S | S | S | S | Calm | Calm | Calm | Calm | Calm | W | W | NW | NW | NW | NW | NW | NW | NW | N |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map
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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.
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. |