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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 6:03AM | Sunset 7:56PM | Saturday August 17, 2019 8:41 PM CDT (01:41 UTC) | Moonrise 9:19PM | Moonset 7:53AM | Illumination 94% |  |
LMZ646 Wind Point Wi To Winthrop Harbor Il- 705 Pm Cdt Sat Aug 17 2019
Tonight..Southeast wind 5 to 10 knots veering south after midnight, then rising to 10 to 15 knots early in the morning. Slight chance of showers in the evening. Slight chance of showers and Thunderstorms after midnight, then chance of showers and Thunderstorms early in the morning. Waves around 1 foot.
Sunday..Southwest wind 10 to 20 knots backing south 15 to 20 knots late in the morning, then veering southwest early in the afternoon easing to 10 to 15 knots late in the afternoon. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon. Waves 1 to 2 feet building to 2 to 4 feet early in the afternoon, then subsiding to 1 to 2 feet late in the afternoon.
Sunday night..Southwest wind 10 to 15 knots becoming west 5 to 10 knots late in the evening, then becoming northwest 10 to 15 knots after midnight. Chance of showers and Thunderstorms through around midnight, then slight chance of showers and Thunderstorms after midnight. Waves around 1 foot.
Monday..North wind 10 to 15 knots becoming northeast 5 to 10 knots in the late morning and afternoon. Sunny. Waves 1 to 2 feet.
Tonight..Southeast wind 5 to 10 knots veering south after midnight, then rising to 10 to 15 knots early in the morning. Slight chance of showers in the evening. Slight chance of showers and Thunderstorms after midnight, then chance of showers and Thunderstorms early in the morning. Waves around 1 foot.
Sunday..Southwest wind 10 to 20 knots backing south 15 to 20 knots late in the morning, then veering southwest early in the afternoon easing to 10 to 15 knots late in the afternoon. Showers and Thunderstorms likely in the morning, then chance of showers and Thunderstorms in the afternoon. Waves 1 to 2 feet building to 2 to 4 feet early in the afternoon, then subsiding to 1 to 2 feet late in the afternoon.
Sunday night..Southwest wind 10 to 15 knots becoming west 5 to 10 knots late in the evening, then becoming northwest 10 to 15 knots after midnight. Chance of showers and Thunderstorms through around midnight, then slight chance of showers and Thunderstorms after midnight. Waves around 1 foot.
Monday..North wind 10 to 15 knots becoming northeast 5 to 10 knots in the late morning and afternoon. Sunny. Waves 1 to 2 feet.
LMZ646 Expires:201908180400;;800740
FZUS53 KMKX 180006
NSHMKX
Nearshore Marine Forecast
National Weather Service Milwaukee/Sullivan WI
705 PM CDT Sat Aug 17 2019
For waters within five nautical miles of shore on Lake Michigan
LMZ646-180400-
7 Day Forecast for Marine Location Near Darien, WI
Hourly EDIT Helplocation: 42.6, -88.75 debug
Area Discussion for - Milwaukee/Sullivan, WI
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus63 kmkx 172329 afdmkx area forecast discussion national weather service milwaukee sullivan wi 629 pm cdt Sat aug 17 2019 Update Initial area of focus for convective development this evening will be off to the southwest across eastern iowa, along the 850 mb frontal zone. CU has been percolating there for a few hours now, but have only seen a few transient showers thus far. A few stray showers may affect areas south and west of madison later this evening, but most of the area should remain dry until after midnight. At that point, focus shifts to a line of thunderstorms already taking shape across the dakotas and western minnesota. Expect this activity to push into the western parts of the forecast area between midnight and 5 am, eventually moving east through the entire region during the early to mid morning hours on Sunday. Depending on the degree of organization when the thunderstorms arrive, a few strong severe storms will be possible, with a threat of gusty winds and large hail. The severe threat will be highest along and west of the i-90 corridor. Aviation(00z tafs) Vfr should prevail this evening and the first part of the overnight. Thunderstorms will then develop ahead of a cold front and move into the area after midnight from the west southwest, eventually affecting all terminals into the morning on Sunday. Gusty winds and periods of ifr visibility can be expected with any thunderstorms. Southwest winds will then become gusty Sunday afternoon before the actual surface front moves through. Some lower ceilings may linger for a time behind the rain, but should lift back toVFR during the afternoon. Winds will eventually shift to more of a westerly direction late tomorrow afternoon into the evening hours. Prev discussion (issued 334 pm cdt Sat aug 17 2019) short term... tonight and Sunday... Forecast confidence is medium. Weak moisture advection is setting off a few light showers over the far southern CWA late this afternoon. These light showers should continue for several hours before diminishing around 00z. Can not rule out an isolated storm due to MUCAPE around 1k j kg. Otherwise, quiet and dry conditions are expected for the bulk of the evening. Low level moisture will increase later tonight as precipitable water increases to 1.5 to 2". Short term guidance in reasonable agreement on a strengthening low level jet developing across ia mn area around 06z and spreading east into southern wi by 12z. Similarly, a moderate mid-level short wave strengthening over the sodak region is expected to move east and further strengthen. This synoptic system will move across southern wi during the same time period. Normally would go with widespread high pops for this developing synoptic setting. However one caveat is that the convection may develop along the warm front that extends from northern ia into northern il overnight, which would |
retard the heavier convection from spreading into southern wi. Hence lower confidence for convection spreading into the northeast cwa and held off on categorical pops in this area. Had enough confidence to spread higher pops across more of the west late tonight into early Sunday however. Synoptic lift moves off rapidly to the east by later Sunday morning. Severe threat looks fairly low with weak mid-level lapse rates. Also trended away from higher low level winds depicted by outlier NAM guidance. Small chance for showers and storms will continue Sunday afternoon as lingering cold front moves through southern wi. Long term... Sunday night through Monday night... Forecast confidence is high. A cold front will be pushing through Sunday evening which will clear any rain and thunderstorms out of the area mainly before midnight. Dry and cooler conditions then move in with overnight lows dropping into the mid 50s to mid 60s. An area of high pressure will then move in for Monday and bring with it sunny skies and highs in the upper 70s to low 80s. Tuesday through Saturday... Forecast confidence is medium. Another 500mb shortwave trough will pass through Tuesday bringing chances for rain and thunderstorms back to the area. There is some uncertainty with the timing, placement and whether we are able to break through the capping inversion. The best lift could be provided by the cold front expected to push through Tuesday evening. This would provide a better area of convergence for thunderstorm development as there will be around 2,000 j kg of instability available. As the front pushes southeast rain chances will diminish and allow an area of high pressure to move in with dry and cooler conditions expected for the rest of the work week. Highs are expected to be in the 70s and lows in the 50s. Saturday we'll have to watch for a few showers and thunderstorms with an approaching system, but confidence is too low at this time to include in the forecast. Marine... Southeast winds over the nearshore waters and far southern lake michigan will gradually veer to the south tonight. Lighter south to southwest winds over the bulk of the open waters will gradually increase mainly from the south ahead of an approaching cold front. The NAM remains an outlier with strong low level winds developing late tonight and early Sunday, while other short term guidance a bit weaker. Hence went with a blend with gusts of 23 to 28 knots over the open waters of lake michigan on Sunday. Also due to the uncertainty, kept peak winds at or below 22 kts in the nearshore waters for now, below small craft criteria. Expect a period of showers and t-storms to move across the lake mainly on Sunday. Mkx watches warnings advisories Wi... None. Lm... None. Update... Boxell tonight Sunday and aviation marine... Boxell Sunday night through Saturday... 99 |
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 |
| KNSW3 - Kenosha, WI | 50 mi | 41 min | S 5.1 G 6 | 73°F | 1011.2 hPa (-0.3) |
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 | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
| Last 24hr | 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 | SW G10 | S G8 | S G10 |
| 1 day ago | 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 | S G13 | S G11 | SW G7 |
| 2 days ago | 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 | NE | N G8 | N |
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 |
| Janesville-Rock County, WI | 15 mi | 1.9 hrs | SSW 8 | 10.00 mi | Mostly Cloudy | 77°F | 66°F | 69% | 1010.8 hPa |
| Burlington Municipal Airport, WI | 24 mi | 66 min | S 3 | 10.00 mi | Partly Cloudy | 71°F | 68°F | 92% | 1011.5 hPa |
Link to 5 minute data for KJVL
Wind History from JVL (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 | W | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | Calm | NE | SE | Calm | SE | SE | S | SE | SE | SW | |||
| 1 day ago | Calm | Calm | Calm | SE | S | SE | SE | SE | Calm | S | S | SE | S | S G15 | S G15 | S G15 | SW G15 | SW G15 | SW G14 | SW G14 | W | W | W | W |
| 2 days ago | NE | N | NE | NE | Calm | Calm | NW | NW | NW | NW | NW | NW | N | N | NE | NE | N | E | Calm | Calm | E | E | Calm | Calm |
Tide / Current Tables for
EDIT Weekend mode (on/off) (on/off) HelpTide / Current Tables for
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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 Milwaukee/Sullivan, WI (21,6,7,8)
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Ground Weather Radar Station Milwaukee, WI
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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. |