Saturday, April10, 2021
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Marine Weather and Tides
Twin Lakes, WI

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:17AMSunset 7:30PM Saturday April 10, 2021 2:18 PM CDT (19:18 UTC) Moonrise 6:07AMMoonset 6:11PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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LMZ646 Wind Point Wi To Winthrop Harbor Il- 106 Pm Cdt Sat Apr 10 2021
.small craft advisory in effect through Sunday afternoon...
Rest of today..Northeast wind 15 to 20 knots with gusts to around 25 knots. Patchy fog through the day. Showers likely early in the afternoon. Rain showers late in the afternoon. Waves 1 to 3 feet building to 2 to 4 feet late in the afternoon.
Tonight..Northeast wind 15 to 20 knots with gusts to around 25 knots becoming 10 to 20 knots late in the evening, then veering southeast 10 to 15 knots after midnight. Patchy fog through the night. Showers through around midnight. Chance of showers after midnight. Waves 3 to 4 feet building to 4 to 6 feet late in the evening, then subsiding to 3 to 5 feet after midnight subsiding to 3 to 4 feet early in the morning.
Sunday..Southeast wind 5 to 10 knots backing north late in the afternoon. Patchy fog. Chance of showers. Waves 3 to 4 feet subsiding to 1 to 2 feet late in the afternoon.
Sunday night..Northwest wind 5 to 10 knots backing west early in the morning. Chance of showers through the night. Waves 1 to 2 feet.
LMZ646 Expires:202104102200;;341917 FZUS53 KMKX 101807 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 106 PM CDT Sat Apr 10 2021 For waters within five nautical miles of shore on Lake Michigan LMZ646-102200-


7 Day Forecast for Marine Location Near Twin Lakes, WI
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location: 42.52, -88.26     debug


Area Discussion for - Milwaukee/Sullivan, WI
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FXUS63 KMKX 101358 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 858 AM CDT Sat Apr 10 2021

UPDATE. (Issued 859 AM CDT Sat Apr 10 2021)

No major changes to the forecast for the rest of today and tonight. Light showers are starting to push into far southeastern Wisconsin this morning, with more steady rain back to the south and southwest over west central Illinois and southeastern Iowa. This will push into the area later this morning into the early afternoon, with steady moderate rain then expected into tonight.

Latest guidance suggests that rainfall forecasts are on track, with most of the area seeing a total of around 1 to 1.5 inches of rain. Slightly heavier amounts are expected where the main band of rain pivots later tonight as the surface low swings around the southern edge of Lake Michigan; right now, that looks to be across south central Wisconsin. Amounts up to 2 inches are possible in this area.

Boxell

SHORT TERM. (Issued 356 AM CDT Sat Apr 10 2021)

Today through Sunday:

The low pressure system currently over southeast Missouri will slowly push northeastward through the day and bring us another round of rain. Chances will increase as we head toward the late morning/early afternoon as 250mb jet divergence moves overhead along with positive vorticity advection, and 850-700mb warm air advection. Can't rule out a rumble of thunder this afternoon/evening for the eastern half of our area as there could be some CAPE available. Winds will also pick up from the northeast for this afternoon and evening with gusts up to 30 mph.

We'll lose some focused support over southeast Wisconsin as the "dry slot" moves in tonight, but with plenty of low level moisture in place light showers and drizzle are expected to continue into Sunday. Farther west the low level winds will help focus light to moderate rain over the western half of the area tonight into Sunday. A good 1-2 inches is expected across most of the area, no flooding is expected but rivers might reach bankfull.

RAH

LONG TERM. (Issued 356 AM CDT Sat Apr 10 2021)

Sunday night through Friday:

A messy pattern is expected to dominate the weather through the long term period. The low that brought the rain Sat/Sun lifts into Michigan early Monday morning and starts to open up. A secondary trough moving out of the northern Rockies and into the northern Plains stalls and absorbs the first system. The result is a sheared out trough stretching from the Pac NW eastward through the Great Lakes and into the NE US. While this feature does begin to break down towards the end of the week we'll still have plenty of little vort maxes lingering around the area that could bring some drizzle or light precip.

For early Monday as the low begins to open up we'll start to see some influence from the incoming trough and this should be enough to keep light showers going across the area. On and off light shower continue through Monday evening before starting to taper off and lift northward. Highs on Monday given the conditions are a little above what we might expect with most models in the mid 50s and a few with some upper 50s mixed in there. This could be due to the transition between upper level features with temps aloft warming briefly mid-day Monday and any breaks in the clouds may allow temps to bump up quickly.

Cooler air moves in as precip ends with lows dropping into the upper 30s to lower 40s Monday night into Tuesday. We'll stick with the cooler temps and partly to mostly cloudy conditions through the middle of the week. Then as the upper pattern begins to break down should see some subtle warming in temps to end the week. All in all though highs stay near normal to above normal.

Stumpf

AVIATION. (Issued 859 AM CDT Sat Apr 10 2021)

Widespread MVFR is expected this morning into this afternoon, with ceilings lowering as precipitation moves into the area. IFR then becomes more likely this afternoon into tonight, with low ceilings expected. Visibility restrictions are also likely with the areas of rainfall. These conditions will persist into Sunday morning.

Winds are currently somewhat variable this morning, but will begin to increase and become more northerly this afternoon as an area of low pressure approaches from the southwest. Breezy north to northeast winds are expected tonight, becoming more northwesterly tomorrow, as this low moves across the southern tip of Lake Michigan.

Boxell

MARINE. (Issued 356 AM CDT Sat Apr 10 2021)

There are areas of dense fog over the northern half of the lake, therefore a Dense Fog Advisory is in place this morning. Winds are expected to increase as we head towards the afternoon and should help improve visibilities temporarily before the rain moves in. Gusts up to 30 knots are possible. A Small Craft Advisory is in effect for the nearshore zones this afternoon into Sunday due to winds and waves. Tonight into Sunday winds will gradually become lighter and shift to the southeast and east before becoming more north to northwesterly Sunday night.

RAH

MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . Small Craft Advisory . LMZ643-LMZ644-LMZ645-LMZ646 . 4 PM Saturday to 1 PM Sunday.

Dense Fog Advisory . LMZ261-LMZ362-LMZ364-LMZ366-LMZ563-LMZ565- LMZ567-LMZ868 until 11 AM Saturday.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KNSW3 - Kenosha, WI 24 mi79 min N 12 G 14 45°F 1001.4 hPa (-3.7)
WHRI2 - Waukegan Harbor, IL 26 mi79 min NNE 18 G 20 46°F
MLWW3 - Milwaukee, WI 39 mi39 min N 9.9 G 11 44°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Burlington Municipal Airport, WI12 mi24 minNE 910.00 mi54°F50°F86%1000 hPa
Kenosha, Kenosha Regional Airport, WI18 mi26 minNE 1510.00 miMostly Cloudy56°F48°F75%1000 hPa
Chicago/Waukegan Regional Airport, IL22 mi24 minNE 13 G 2610.00 miLight Rain51°F46°F83%999.5 hPa

Link to 5 minute data for KBUU

Wind History from BUU (wind in knots)
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SW8SW7SW8SW8SW7SW3CalmS6CalmS3W4CalmCalmCalmNE3NE6NE9NE7NE10
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1 day agoE4E5E5E4SE6S7S10
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S5S6S5S7S8S6S8S5S7S5S7S11
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2 days agoS8
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CalmE5CalmCalmE3E5SE5SE3CalmCalmCalmCalmCalmE5SE4E5SE4SE8SW13SW3Calm

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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