Sunrise 6:00 AM   Sunset 7:39 PM Moonrise 3:35 PM   Moonset 4:28 AM

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LMZ646 Wind Point Wi To Winthrop Harbor Il- 105 Am Cdt Fri Apr 19 2024
.small craft advisory in effect from 10 am cdt this morning through this evening - .
Rest of tonight - Northwest wind 10 to 15 knots. Gusts up to 20 knots early in the morning. Partly cloudy. Waves 1 to 2 feet. Friday - Northwest wind 10 to 15 knots becoming west 15 to 20 knots late in the morning, then becoming west 15 to 20 knots with gusts to around 25 knots in the afternoon. Sunny. Waves 1 to 2 feet. Friday night - West wind 15 to 20 knots easing to 10 to 15 knots in the late evening and early morning, then rising to 15 to 20 knots early in the morning. Partly cloudy through around midnight then clearing. Waves 1 to 2 feet. Saturday - West wind 15 to 20 knots becoming northwest 10 to 15 knots late in the afternoon. Sunny in the morning then becoming partly Sunny. Waves 1 to 2 feet.

LMZ600
No data

FXUS63 KMKX 190231 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 931 PM CDT Thu Apr 18 2024

KEY MESSAGES

- Cooler pattern through the weekend may result in frost and freeze concerns Fri nt and again Sat nt especially in the Wisconsin River Valley.

- Dry pattern through this weekend, but a chance for rain Monday evening through Tuesday morning.



UPDATE
Issued 930 PM CDT Thu Apr 18 2024

The rain has ended over se WI while the clearing line is moving across south central WI with a cold front over wrn WI. The cold front which extends from low pressure over nrn Ontario will move into ern WI by the early morning hours, as the low pressure area over IN moves toward the lower Great Lakes. The wly winds and cold advection may be able to lower temps into the lower 30s nw of Madison by morning, but any period of freezing temps should be very short if reached at all. Breezy wly winds are then expected the remainder of Fri as the Ontario low pressure area deepens as it moves into srn Hudson Bay. Low level instability will lead to scattered to broken high based cumulus during the afternoon. High temps in the lower to middle 50s still looks good.

Gehring

SHORT TERM
Issued 307 PM CDT Thu Apr 18 2024

Tonight through Friday night:

Southern WI will be sandwiched between two surface lows this evening bring additional shower chances. As the southern low currently located over MO to lifts across central IL/IN through this evening, expect some of the rainfall activity to pick up along the WI/IL border with totals nearing a quarter of an inch, but could see a pocket or two of locally higher. However, rainfall elsewhere looks to remain light with amounts around a few hundredths of an inch to a tenth of an inch.

The southern low is progged to push east later tonight and drier air moves into the region and rain chances diminish later this evening. However, thinking the cloud cover may linger a bit longer, but should gradually clear by daybreak Friday. Given the clearing may see temps dip into the mid to upper 30s and result in some patchy frost, but given the narrow wind between the clouds clearing and temps dropping along with winds looking to remain high enough, not confident on seeing widespread frost development.

Northwesterly winds begin to pick up overnight into Friday as the pressure gradient remains tight over southern WI as the northern, stronger surface low meanders over central Ontario while high pressure builds across the Plains. This will result in breezy to gust northwesterly winds through Friday afternoon with gusts 25-35 mph.

Otherwise, Friday should remain mostly dry with the building surface high to the west. However cannot rule out a few light showers across our central WI counties on the backside of the northern low paired with the lingering upper-level trough, but potential remains low (<15%). Friday should remain fairly clear and sunny and despite the CAA/northwesterly winds, expecting to see temps rise into the lower 50s by the afternoon. Winds will gradually ease, but still remain breezy as the Ontario low slides further east and influence from thew high spreads further east into the start of the weekend.

Wagner

LONG TERM
Issued 307 PM CDT Thu Apr 18 2024

Saturday through Thursday:

High pressure and zonal upper-level flow will persist through much of the weekend. This will keep temps relatively cooler with daily highs around or just below normal and overnight temps in the 30s. Could see nightly frost potential Saturday and Sunday nights given the near freezing temps and light winds. High pressure will begin to slide further south-southeast ahead of an upper-level trough early next week. Meanwhile southerly flow will increase and looking to have a brief warm up toward the start of next week. Then a more active pattern is expected for Tuesday as long range models bring a surface low across the region along with increased rain chances.

Wagner

AVIATION
Issued 930 PM CDT Thu Apr 18 2024

Areas of MVFR Cigs late this evening over ern WI will clear by early morning Friday. VFR conditions will then prevail through Fri into Fri nt. Westerly wind gusts of 25-35 kts for late Fri AM through the afternoon.

Gehring

MARINE
Issued 307 PM CDT Thu Apr 18 2024

Lake Michigan will be sandwiched between two areas of low pressure. Expect lighter winds to continue through the evening as the southern low pressure centered over MO this afternoon lifts across central IL/IN. Meanwhile the northern low across Ontario is progged to meander into the Hudson Bay region and deepen through Friday. Expect a stronger pressure gradient develop over the region for Friday with high pressure building across the Plains resulting in 25-30 knot northwesterly winds for Friday. High pressure is expected to gradually work its way south-southeast through the weekend with lighter winds over Lake Michigan. Then southerly winds return by the start of next week ahead of a developing low over the Plains.

Wagner

MKX WATCHES/WARNINGS/ADVISORIES
WI...None.
LM
Small Craft Advisory
LMZ643-LMZ644-LMZ645-LMZ646...10 AM Friday to 7 PM Friday.

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