Lake Koshkonong, WI Marine Weather and Tide Forecast

Marine Weather and Tide Forecast for Lake Koshkonong, WI

April 14, 2024 2:09 AM CDT (07:09 UTC) Change Location
Sunrise 6:13 AM   Sunset 7:38 PM
Moonrise 10:17 AM   Moonset 1:56 AM 
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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.

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Marine Forecasts
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LMZ645 North Point Light To Wind Point Wi- 105 Am Cdt Sun Apr 14 2024

.small craft advisory in effect until 7 am cdt this morning - .

Rest of tonight - Southwest wind 15 to 20 knots. Gusts up to 25 knots. Mostly clear. Waves 2 to 4 feet.

Sunday - West wind 15 to 20 knots becoming northwest 10 to 15 knots late in the morning, then becoming north 5 to 10 knots in the afternoon. Sunny. Waves 1 to 2 feet.

Sunday night - North wind 5 to 10 knots. Mostly clear. Waves around 1 foot.

Monday - West wind 5 to 10 knots veering northeast late in the morning, then veering east in the afternoon. Sunny. Waves 1 to 2 feet.

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7 Day Forecast for Marine Location Near Lake Koshkonong, WI
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Area Discussion for - Milwaukee/Sullivan, WI
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Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 757 PM CDT Sat Apr 13 2024


- Above normal temps expected for the weekend into early next week.

- Keeping an eye on severe thunderstorm potential next Tuesday.

Issued 756 PM CDT Sat Apr 13 2024

No big changes this evening or tonight. Batch of mostly high level cirrus to move east after midnight, leaving a generally clear sky over southern Wisconsin later tonight. At the same time, surface wind should become light out of the west. This will allow temperatures to drop into the lower 50s around daybreak Sunday. Warmth and pleasant conditions remain advertised for Sunday.


Issued 239 PM CDT Sat Apr 13 2024

Tonight through Sunday night:

Upper level ridging will remain in place through the rest of the weekend across southern Wisconsin. A shortwave trough will overrun the ridging tonight, but the better lift and moisture is expected to remain well to the north of our forecast area.
This means if your headed north over the weekend your likely to encounter some rain showers. Conditions will remain dry across southern Wisconsin through Monday.

The breezy southwest to south winds today will shift to northwesterly Sunday behind the shortwave trough and associated weak sfc frontal boundary. No rainfall is expected during this time due to a lack of moisture and lift. Despite the northwest flow temperatures will be climbing throughout the day Sunday with daytime highs expected to climb into the mid 70s.
Confidence is high in the warmer temps when looking at the 925mb temperatures which are around 14-19 degrees C throughout the afternoon and evening.


Issued 239 PM CDT Sat Apr 13 2024

Monday through Saturday:

As the upper level ridge begins to pull out of Great Lakes Region, on its heels will be a trough thats advancing from the desert SW. Monday will likely (80% or higher) remain under the influence of the exiting ridge which will keep conditions pleasant and dry.

Monday night into Tuesday this strong trough and surface low pressure system will advect toward the state. As the surface low advances northeast, the warm from is expected to move into southern Wisconsin bringing rain and storms. The potential for any storms to become strong to severe will be dependent on whether or not skies clear behind the warm front. Guidance seems to be split on this with the longest running short term models just barely being able to pick up this Tuesday system, there is a decent mix of clear and overcast conditions. The two likely scenarios are as follows:

Warm front moves through an initially round of rainfall and skies remain overcast resulting in a rough environmental recovery. Instability will be lacking in this instance which will result in a small potential (30% ish) for some strong storms.

The second would still have the warm front move through maybe there is a bit of rain along the leading edge, but skies quickly clear out. This results in warming temperatures and increasing instability. With the potential for some good 0-6km shear around 40-50 kts, the likelihood of severe storms will increase. Its still a bit far out to be drawing an concrete conclusions on the intensity of any severe weather or what the potential hazards may be. However, it is likely (~80% chance) that there will be rain and a few thunderstorms at least.

Looking ahead to Wednesday, the upper level trough is expected to be overhead. During this time rain/storms is expected to persist through much of the day. The better upper level support will shift east, which will lower our potential for severe weather during this time. Further ahead for the end of the work week, low chance POPs (20% chance or lower)are making their way into the forecast. This is in part due to model discrepancies between the next trough that is expected to be on the heels of this Tuesday system. This second trough is expected to descend out of northwestern Canada and long term guidance is split on track for this one. Overall the focus will be on Tuesday through the weekend.


Issued 756 PM CDT Sat Apr 13 2024

Other than patches of high clouds, VFR conditions will exist for the rest of tonight and into Sunday. Breezy surface wind will become light out of the west, then eventually northwest Sunday morning across southern Wisconsin.


Issued 239 PM CDT Sat Apr 13 2024

Southerly winds have set up across the Lake this afternoon as the surface ridge moves into Michigan. Breezy south winds with gusts of 20-25 kts in the nearshore will be possible through this evening. With an inversion expected to set up over Lake Michigan the best chance for gusty winds will be prior to sunset. A Small Craft Advisory is in effect through early Sunday morning due to the gusty winds. A passing wave of low pressure and cold front will then shift winds back out of the north to northwest by Sunday afternoon. Light and variable winds are in store Sunday night into Monday. Tuesday gusty south winds are expected to return with a potential for some gale force gusts.
Tuesday and Wednesday also brings the return of rain/storms.


Small Craft Advisory
LMZ645-LMZ646 until 7 AM Sunday.

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KJVL SOUTHERN WISCONSIN RGNL,WI 20 sm19 minSSW 0710 smClear63°F39°F42%29.68
KRYV WATERTOWN MUNI,WI 22 sm14 minSSW 1410 smClear61°F50°F68%29.63
Link to 5 minute data for KJVL

Wind History from JVL
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Tide / Current for
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GEOS Local Image of great lakes   

Milwaukee, WI,

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