|
Marine Weather and Tides
Version 3.4 |
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 5:59AM | Sunset 7:50PM | Saturday August 17, 2019 6:34 PM CDT (23:34 UTC) | Moonrise 9:14PM | Moonset 7:49AM | Illumination 94% |  |
LMZ741 Expires:201908180315;;792180 Fzus53 Klot 172015 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 315 Pm Cdt Sat Aug 17 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>742-180315- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 315 Pm Cdt Sat Aug 17 2019
Tonight..South winds 10 to 15 kt. Chance of showers and Thunderstorms through the night. Waves 1 ft or less building to 1 to 3 ft late.
Sunday..Southwest winds 15 to 20 kt. Chance of showers and Thunderstorms. Waves 1 to 3 ft.
Sunday night..Southwest winds 10 to 15 kt becoming northwest 5 to 10 kt after midnight. Chance of showers and Thunderstorms. Waves 1 ft or less.
Monday..Northeast winds around 10 kt. Mostly Sunny. Waves 1 to 3 ft.
Tonight..South winds 10 to 15 kt. Chance of showers and Thunderstorms through the night. Waves 1 ft or less building to 1 to 3 ft late.
Sunday..Southwest winds 15 to 20 kt. Chance of showers and Thunderstorms. Waves 1 to 3 ft.
Sunday night..Southwest winds 10 to 15 kt becoming northwest 5 to 10 kt after midnight. Chance of showers and Thunderstorms. Waves 1 ft or less.
Monday..Northeast winds around 10 kt. Mostly Sunny. Waves 1 to 3 ft.
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 171929 afdlot area forecast discussion national weather service chicago romeoville, il 229 pm cdt Sat aug 17 2019 Short term 228 pm cdt through Sunday... several forecast challenges concerns this afternoon through Sunday morning, initially with respect to any additional scattered shower storm development this afternoon and then more widespread shower and storm potential overnight into early Sunday morning. In the near term, focus revolves around another incoming mid-level wave across eastern iowa this afternoon, which is expected to gradually shift eastward across northern il through the remainder of the daylight hours. Despite the atmosphere being considerably worked over this morning, a CU field is already evident across parts of eastern ia and northwest il out ahead of the wave in an increasingly unstable environment, along with some isolated to scattered radar returns (no lightning as of yet). Given the anticipated arrival of greater support aloft and some recovery across northeast il northwest in, will continue the mention of scattered showers and thunderstorms across the forecast area this afternoon... Most likely between 20z and 00z before support strips off to the east and a lull in activity is expected to become the rule this evening. There remains a non-zero chance through this afternoon for a stronger storm or two, mainly capable of producing gusty winds and perhaps some hail. However, focus rather quickly shifts to the tonight into early Sunday time frame as an active pattern is expected to remain in place. Additional, potentially widespread, showers and storms appear likely during this time frame as no real change to the overall pattern and environment is anticipated, with highly active mid- levels and strong warm air advection supported by a stout llj expected to be in place across the region. Latest trends continue to suggest a complex of thunderstorms developing across southern mn iowa late this evening into the early overnight hours before tracking eastward toward the CWA toward sunrise Sunday. While confidence isn't stellar, feel the most likely timing for storms to track through the region is somewhere between 09-14z, with most guidance in agreement with this timing. The exception is recent hrrr runs, which have significantly slowed shower storm chances to after 12z Sunday. There will remain a severe weather threat with these storms, primarily in the form of strong damaging winds, and to a lesser extent, large hail. Given lots of deep layer moisture (pwats progged AOA 1.75 inches), heavy downpours with at least an isolated flooding risk will also be a concern. Beyond Sunday morning, would expect some drier conditions to return for part of the day, although with lingering surface trough boundary across the region, wouldn't be surprised to see an additional isolated shower and or storm develop late in the day early evening. High temperatures Sunday expected to range from the low-upper 80s across the forecast area with afternoon heat indices near 90 degrees for many areas. Gillen Long term 226 pm cdt Sunday evening through Saturday... a surface trough will cross the area Sunday evening into Sunday night. This will lead to lingering chances for isolated to scattered showers and thunderstorms during the evening, with the threat decreasing from northwest to southeast into the overnight. |
Surface high pressure will move in from the west Monday and depart Tuesday. The high will bring modestly drier air with it and somewhat cooler temps for Monday with highs in the lower 80s north to mid 80s south. Winds shift southerly Tuesday bringing warmer and more humid back into the area. An upper trough will cross the area with a weak surface reflection accompanying it. Will need to see what kind of thunderstorm chances will be present with this, but guidance seems to be more focused on something tracking more to the south of the area. Will keep chance pops going Tuesday night and Wednesday morning. A deeper upper low will move across ontario Wednesday pushing cooler and drier air into the local area as another surface high builds in, this time from the north. Guidance is at odds with some of the details with the GFS favoring slightly active upper flow which suggests subtle chances for shower thunder development late this week. Will continue with a dry forecast from Wednesday afternoon into the weekend but continue to keep an eye on how the pattern evolves. Mdb Aviation For the 18z tafs... for the remainder of the afternoon, forecast concerns will continue to focus on shra tsra chances and possible cig vis impacts. At 18z, a weak short wave is lifting from nern il to SRN lake michigan. All lightning activity appears to have ended though some isolated showers could linger near the chicago area terminals until shortly after issuance time of 18z. To the west, a stronger short wave is moving over ERN iowa and scattered showers are developing in the warm advection zone across northwestern illinois, which has not seen much pcpn this morning. Latest satellite imagery indicates rapid CU development in this area while radar data shows the developing showers, initially west of a line from fep to gbg. As the shortwave quickly advances ewd, expect renewed pcpn chances with more scattered showers and isolated thunderstorms possible. While the air mass over nern il has been somewhat worked over by earlier convective activity, the low level environment will still be warm and unstable, so the added forcing from the short wave should be sufficient to support additional showers with isolated thunderstorms. Based on timing the passage of the short wave, the most favorable location and timing of thunderstorms will likely be in the 21-23z time frame. Following the passage of this system, a lull in the activity is expected for the evening and into the late night hours. Latest high res model guidance continues to suggest another round of showers and thunderstorms to impact the terminals for the late night early morning hours. Another short wave, initially over the northern plains, is expected to cross the local area late tonight or early tomorrow morning. Given some timing uncertainty, have gone with a prob30 tsra for the 09-12z time frame with prevailing tsra for the 12-15z time frame. Depending on the exact speed of the short wave, this timing may need to be adjusted. There is better confidence that activity will settle down quickly following the passage of this wave and the remainder of the day should be quiet. Lot watches warnings advisories Il... None. In... None. Lm... None. 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 | 94 min | SSW 5.1 | 78°F | ||||
| 45174 | 7 mi | 34 min | SSE 3.9 G 5.8 | 74°F | 1 ft | 1008.7 hPa (-1.0) | ||
| OKSI2 | 9 mi | 94 min | E 1.9 G 2.9 | 80°F | ||||
| 45177 | 10 mi | 154 min | 76°F | 1 ft | ||||
| CHII2 - Chicago, IL | 10 mi | 64 min | S 6 G 6 | 76°F | 73°F | |||
| CNII2 | 13 mi | 34 min | SSW 8.9 G 9.9 | 77°F | 67°F | |||
| JAKI2 | 18 mi | 94 min | SW 6 G 9.9 | 78°F | ||||
| CMTI2 - 9087044 - Calumet, IL | 22 mi | 46 min | S 6 G 8 | 77°F | 1010.9 hPa | 70°F | ||
| 45186 | 24 mi | 34 min | SE 3.9 G 5.8 | 74°F | 74°F | 1 ft | ||
| 45187 | 32 mi | 34 min | SSW 1.9 G 3.9 | 78°F | 73°F | 1 ft | ||
| BHRI3 - Burns Harbor, IN | 39 mi | 31 min | WSW 4.1 G 8 | 78°F | 1011.9 hPa | |||
| KNSW3 - Kenosha, WI | 39 mi | 34 min | Calm G 2.9 | 76°F | 1011.2 hPa (-0.7) | |||
| 45170 | 43 mi | 74 min | WSW 5.8 G 7.8 | 76°F | 75°F | 1 ft | 71°F | |
| MCYI3 - Michigan City, IN | 46 mi | 44 min | SW 8.9 G 12 | 77°F | 69°F |
Wind History for Calumet Harbor, IL
(wind in knots) EDIT (on/off) Help| 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 | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | |
| Last 24hr | S G13 | S G11 | SW G7 | SW G9 | SW G7 | SW | SW G5 | SW | SW | SW | SW | SW | SW | SW | S | W | S | S G12 | S G9 | NE | E | S | SE G7 | SW G11 |
| 1 day ago | NE | N G8 | N | N | NE | NE | -- | S | S | S | SE | S G7 | SE | S | SE G10 | S | S G9 | S G11 | S G11 | S G15 | SW G18 | S G14 | S G15 | S G13 |
| 2 days ago | N G13 | N G11 | N G11 | N G10 | NW G12 | NW G12 | NW G11 | NW G10 | N G11 | N | NW G12 | NW G10 | N G10 | N G13 | N G12 | NW G14 | N G16 | NW G16 | N G17 | N G15 | N G13 | N G12 | N G11 | N G11 |
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 | 2.7 hrs | S 6 | 10.00 mi | A Few Clouds | 77°F | 69°F | 77% | 1011.8 hPa |
| Chicago, Chicago-O'Hare International Airport, IL | 12 mi | 1.7 hrs | S 6 | 10.00 mi | Overcast | 75°F | 69°F | 82% | 1011.4 hPa |
| Chicago, Chicago Midway Airport, IL | 17 mi | 2.7 hrs | SSW 6 | 10.00 mi | Overcast | 76°F | 70°F | 82% | 1011 hPa |
Link to 5 minute data for KPWK
Wind History from PWK (wind in knots)
| 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 | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | |
| Last 24hr | W | SW | W | SW | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | SE | S | E | SE | SE | S | S | S |
| 1 day ago | E | E | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | S | SE | S | S | S G19 | S | S G17 | S | SW | SW G18 | N G20 |
| 2 days ago | N G16 | N | N | N | N | NW | N | N | N | NW | NW | NW | NW | NW | N | N | N | NE | E | NE | E | NE | NE | NE |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
EDIT (on/off) HelpWeather Map and Satellite Images
(on/off) HelpWeather Map
GOES 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 (19,4,5,8)
(on/off) Help
Ground Weather Radar Station Chicago, IL
(on/off) Help
Ad by Google
|
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. |