Marine Weather and Tide Forecast for Darien, WI
 | Sunrise 5:29 AM Sunset 8:15 PM Moonrise 12:24 AM Moonset 9:02 AM |
LMZ646 Wind Point Wi To Winthrop Harbor Il- 705 Pm Cdt Sat May 17 2025
Tonight - West wind 15 to 20 knots with gusts to around 25 knots becoming northwest 10 to 15 knots with gusts to around 20 knots in the late evening and early morning, then becoming northwest 10 to 15 knots early in the morning. Partly cloudy. Waves 1 to 2 feet.
Sunday - Northwest wind 10 to 15 knots veering northeast late in the afternoon. Mostly cloudy in the morning then becoming mostly Sunny. Waves around 1 foot.
Sunday night - Northeast wind 10 to 15 knots becoming northeast 10 to 15 knots with gusts to around 20 knots late in the evening, then rising to 15 to 20 knots after midnight. Partly cloudy. Waves 1 to 3 feet building to 4 to 6 feet.
Monday - Northeast wind 15 to 20 knots. Gusts up to 25 knots. Mostly cloudy. Waves 4 to 6 feet.
LMZ600
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7 Day Forecast for Marine Location Near Darien, WI
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Area Discussion for Milwaukee/Sullivan, WI
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FXUS63 KMKX 172010 AFDMKX
Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 310 PM CDT Sat May 17 2025
KEY MESSAGES
- Below-normal high temps continue through the middle of next week.
- 15-30% chances for showers in southwestern Wisconsin Monday ahead of the next low pressure system. A few rumbles of thunder may occur.
- Rain chances peak Tuesday / Tuesday night (45-85%) accompanied by breezy east winds as low pressure passes south of the region. Chances taper off into Wednesday (25-40%). A few rumbles of thunder may mix in on Tuesday.
- High temperatures rebound back toward normal by the end of the next week.
SHORT TERM
Issued 410 PM CDT Sat May 17 2025
Tonight and Sunday:
Gusty west winds subside late this evening into tonight. Low clouds linger at scattered to broken coverage, but expecting dry weather to continue.
As high pressure builds into the Hudson Bay vicinity of Canada Sunday, slow and steady north winds are expected inland, with modest northeasterly winds (gaining momentum over the cold lake)
pushing into eastern WI through the day as a weak backdoor cold front / lake breeze. Hence, high temps in the mid 50s Sunday by the lakeshore. Mid to upper 60s inland. Dry weather.
Sheppard
LONG TERM
Issued 410 PM CDT Sat May 17 2025
Sunday night through Saturday:
Low pressure over the central Great Plains on Monday will track eastward through Illinois / Indiana through Wednesday. For Monday this will leave us with only 10-25% chances for rain in southwestern WI, otherwise mostly dry. Mostly cloudy skies and breezy northeast winds off of Lake Michigan will keep all of Wisconsin below seasonal normal temperatures, with inland highs around 60 degrees and lakeshore highs in the low 50s.
East to northeast winds become even gustier for Tuesday, with widespread 45-85% rain chances (highest further south, closer to the passing low pressure). Rumbles of thunder may mix in with the rain at times, though our positioning north of the low pressure system and the cold water temperatures of Lake Michigan preclude any concern of severe weather. Mostly just a beneficial rainfall. 25-40% rain chances linger into Wednesday, tapering as time goes by. Breezy winds backing north-notheast.
High pressure builds back into the region Wednesday night into Thursday, with mostly dry weather and temperatures beginning to moderate back up as north winds gradually subside. Developing low pressure over the Rocky Mountains and broad high pressure over the southeastern CONUS will leave our region with a relatively weak pressure gradient (and slow winds) late next week, with temperatures continuing to climb. A few shortwave troughs in the upper air pattern / weak surface lows (depending on the choice of model) merit some broad-brushed 15% precip chances, but dry for the larger fraction of the time period.
Sheppard
AVIATION
Issued 410 PM CDT Sat May 17 2025
A few lingering pockets of MVFR at the moment, but most areas have seen diurnal cumulus lift to 4,000 ft VFR levels. Dry weather expected through the TAF period. The low clouds are expected to linger through the rest of today with SCT to BKN coverage. Gusty west winds gradually subside this evening.
About 70% confident we will see intermittent MVFR return late tonight into Sunday morning due to lingering low clouds at SCT to BKN coverage.
Sheppard
MARINE
Issued 410 PM CDT Sat May 17 2025
Open Waters / Synopsis:
Breezy west winds continue across Lake Michigan this afternoon, veering northwest this evening and decelerating overnight as 30.4 inch high pressure over Canada moves toward the Hudson Bay vicinity. The approach of this area of high pressure will allow winds to taper during the second half of the overnight hours tonight. Winds will turn due northerly during the day on Sunday as high pressure pivots into far northern Ontario.
Wind speeds will increase during the day on Monday as 30.5 inch high pressure lingers over the Hudson Bay vicinity and 29.4 inch low pressure forms in the central Great Plains. Brisk winds will continue into the day on Tuesday, shifting east-northeasterly as the aforementioned area of low pressure moves into the Ohio River Valley during the afternoon hours. The low will move into the Appalachian Mountains on Wednesday, resulting in a northerly wind shift across Lake Michigan. Given that low pressure will be approaching and passing to the south of the open waters, winds will be gusty on both Tuesday and Wednesday. Gales are not anticipated at this time, though trends will continue to be monitored in the coming forecasts. The approaching low will also bring chances for showers and isolated thunderstorms, with severe weather not expected. Winds will gradually taper Thursday into Friday, when 30.2 inch high pressure is forecast to settle into the western Great Lakes.
Nearshore Zones:
The ongoing Small Craft Advisory expires this evening as gusty westerly winds gradually subside.
Gusty northeast to east winds are expected as low pressure passes south of the region Sunday night through mid week. A prolonged period of Small Craft conditions due to waves and wind gusts is expected. Winds and waves ramp down Thursday into Friday as high pressure builds in.
Sheppard
MKX WATCHES/WARNINGS/ADVISORIES
WI...None.
LM
Small Craft Advisory
LMZ643-LMZ644 until 10 PM Saturday.
Small Craft Advisory...LMZ645-LMZ646 until 7 PM Saturday.
Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 310 PM CDT Sat May 17 2025
KEY MESSAGES
- Below-normal high temps continue through the middle of next week.
- 15-30% chances for showers in southwestern Wisconsin Monday ahead of the next low pressure system. A few rumbles of thunder may occur.
- Rain chances peak Tuesday / Tuesday night (45-85%) accompanied by breezy east winds as low pressure passes south of the region. Chances taper off into Wednesday (25-40%). A few rumbles of thunder may mix in on Tuesday.
- High temperatures rebound back toward normal by the end of the next week.
SHORT TERM
Issued 410 PM CDT Sat May 17 2025
Tonight and Sunday:
Gusty west winds subside late this evening into tonight. Low clouds linger at scattered to broken coverage, but expecting dry weather to continue.
As high pressure builds into the Hudson Bay vicinity of Canada Sunday, slow and steady north winds are expected inland, with modest northeasterly winds (gaining momentum over the cold lake)
pushing into eastern WI through the day as a weak backdoor cold front / lake breeze. Hence, high temps in the mid 50s Sunday by the lakeshore. Mid to upper 60s inland. Dry weather.
Sheppard
LONG TERM
Issued 410 PM CDT Sat May 17 2025
Sunday night through Saturday:
Low pressure over the central Great Plains on Monday will track eastward through Illinois / Indiana through Wednesday. For Monday this will leave us with only 10-25% chances for rain in southwestern WI, otherwise mostly dry. Mostly cloudy skies and breezy northeast winds off of Lake Michigan will keep all of Wisconsin below seasonal normal temperatures, with inland highs around 60 degrees and lakeshore highs in the low 50s.
East to northeast winds become even gustier for Tuesday, with widespread 45-85% rain chances (highest further south, closer to the passing low pressure). Rumbles of thunder may mix in with the rain at times, though our positioning north of the low pressure system and the cold water temperatures of Lake Michigan preclude any concern of severe weather. Mostly just a beneficial rainfall. 25-40% rain chances linger into Wednesday, tapering as time goes by. Breezy winds backing north-notheast.
High pressure builds back into the region Wednesday night into Thursday, with mostly dry weather and temperatures beginning to moderate back up as north winds gradually subside. Developing low pressure over the Rocky Mountains and broad high pressure over the southeastern CONUS will leave our region with a relatively weak pressure gradient (and slow winds) late next week, with temperatures continuing to climb. A few shortwave troughs in the upper air pattern / weak surface lows (depending on the choice of model) merit some broad-brushed 15% precip chances, but dry for the larger fraction of the time period.
Sheppard
AVIATION
Issued 410 PM CDT Sat May 17 2025
A few lingering pockets of MVFR at the moment, but most areas have seen diurnal cumulus lift to 4,000 ft VFR levels. Dry weather expected through the TAF period. The low clouds are expected to linger through the rest of today with SCT to BKN coverage. Gusty west winds gradually subside this evening.
About 70% confident we will see intermittent MVFR return late tonight into Sunday morning due to lingering low clouds at SCT to BKN coverage.
Sheppard
MARINE
Issued 410 PM CDT Sat May 17 2025
Open Waters / Synopsis:
Breezy west winds continue across Lake Michigan this afternoon, veering northwest this evening and decelerating overnight as 30.4 inch high pressure over Canada moves toward the Hudson Bay vicinity. The approach of this area of high pressure will allow winds to taper during the second half of the overnight hours tonight. Winds will turn due northerly during the day on Sunday as high pressure pivots into far northern Ontario.
Wind speeds will increase during the day on Monday as 30.5 inch high pressure lingers over the Hudson Bay vicinity and 29.4 inch low pressure forms in the central Great Plains. Brisk winds will continue into the day on Tuesday, shifting east-northeasterly as the aforementioned area of low pressure moves into the Ohio River Valley during the afternoon hours. The low will move into the Appalachian Mountains on Wednesday, resulting in a northerly wind shift across Lake Michigan. Given that low pressure will be approaching and passing to the south of the open waters, winds will be gusty on both Tuesday and Wednesday. Gales are not anticipated at this time, though trends will continue to be monitored in the coming forecasts. The approaching low will also bring chances for showers and isolated thunderstorms, with severe weather not expected. Winds will gradually taper Thursday into Friday, when 30.2 inch high pressure is forecast to settle into the western Great Lakes.
Nearshore Zones:
The ongoing Small Craft Advisory expires this evening as gusty westerly winds gradually subside.
Gusty northeast to east winds are expected as low pressure passes south of the region Sunday night through mid week. A prolonged period of Small Craft conditions due to waves and wind gusts is expected. Winds and waves ramp down Thursday into Friday as high pressure builds in.
Sheppard
MKX WATCHES/WARNINGS/ADVISORIES
WI...None.
LM
Small Craft Advisory
LMZ643-LMZ644 until 10 PM Saturday.
Small Craft Advisory...LMZ645-LMZ646 until 7 PM Saturday.
Wind History for Calumet Harbor, IL
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Link to 1 hour of 5 minute data for KJVL
Terminal Aerodrome Forecast (TAF) for KJVL
Wind History Graph: JVL
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GEOS Local Image of great lakes
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