textproduct: Milwaukee/Sullivan

KEY MESSAGES

- Seasonal temps and predominantly dry weather into early next week.

- 15-40% chances for some widely scattered rainshowers 6 PM Sunday evening through late Sunday night.

- Return to an active pattern Tuesday night through the following weekend, with chances for rain and storms developing on and off through the week.

SHORT TERM

Issued 305 PM CDT Sat Apr 4 2026

Tonight through Tuesday:

As the past low pressure system continues northeastward, breezy west winds continue tonight into Sunday, diminishing late Sunday afternoon. As evidenced by the low clouds and feint radar returns to our west, some sprinkles (a trace) of rain or virga cannot be ruled out later this afternoon / this evening, left it out of the forecast for now given the performance of dry air advection and rising cloud ceilings on these westerly winds.

Dry weather continues into Sunday, with highs around 50 degrees and a northwest breeze. Some 15-40% chances for widely scattered rainshowers are present 6 PM Sunday evening through late Sunday night. This activity is rendered as some weak open- cellular showers drifting with the stronger northwest flow aloft, tied to some 500mb PVA and colder air arriving aloft.

Northwest winds continue into Monday, with slightly cooler conditions (highs in the 40s, lows around 20). A secondary cold front passes late Monday afternoon. Only ~15% chances for a stray rain shower on Monday (mainly towards east-central WI and with the passing front), perhaps a stray snow shower or two as temperatures fall in the late afternoon / evening. High pressure crosses the region through the daytime hours Tuesday, with completely dry weather and light / variable winds.

Sheppard

LONG TERM

Issued 305 PM CDT Sat Apr 4 2026

Tuesday night through Saturday:

Breezy sly winds will develop Tue nt-Wed as a well organized shortwave trough and low pressure area move ewd along the US/Canadian border. This will boost temps back into the 60s for Wed, but also with chances for showers. Showers will then become likely (60 percent) with the cold frontal passage Wed nt, but scattered showers may linger into Thu.

Another wave of low pressure is then expected for Thu nt-Sat with rain chances at 40-60 percent and high temps in the 50s to lower 60s.

Gehring

AVIATION

Issued 305 PM CDT Sat Apr 4 2026

Breezy west winds and predominantly dry weather expected to continue, with cloud ceilings expected to lift from roughly 1,500 ft to 2,500 ft (possibly higher) through the rest of this afternoon. Some scattered sprinkles of light rain or virga possible later this afternoon into this evening, potential for measurable rainfall is too low for inclusion in the TAFs. Further lifting and scattering (VFR conditions) expected into Sunday morning with a period of mostly clear skies likely by mid day. A west to northwest breeze continues. 15-40% chances for widely scattered rain showers 6 PM Sunday thru late Sunday night.

Sheppard

MARINE

Issued 305 PM CDT Sat Apr 4 2026

Open Waters / Synopsis: Winds will continue to veer southwest and accelerate this afternoon as low pressure around 29.6 inches crosses northern portions of the lake. As low pressure exits into Ontario and deepens to 29.3 inches, expect winds to become due westerly and gust to around 30 kt through tonight.

Winds gradually diminish through Sunday as low pressure exits into northern Quebec. A weak low around 30.0 inches in southern Quebec will drag a cold front southward across the lake, bringing northwest winds late Sunday night into Monday morning. Winds intensify and turn north as strong high pressure around 30.6 inches moves southeastward across Minnesota / Wisconsin late Monday afternoon into Monday night. Gusts upwards of 30 kt expected, but just shy of gale force.

Light and variable winds for the daytime hours of Tuesday as the aforementioned high pressure weakens and crosses the lake. As it drifts further east and low pressure tracks into the northern plains, a period of southerly gales is possible mid week.

Nearshore Zones: A Small Craft Advisory remains in effect through Sunday morning due to gusty west winds. Northwest winds are likely to reach Advisory levels again on Monday, veering north Monday night and allowing waves to build. These waves would then remain above Advisory thresholds into Tuesday morning.

Gusty south winds and building waves are then expected Tuesday night through Wednesday night, with additional potential for Advisory conditions late week.

Sheppard

MKX WATCHES/WARNINGS/ADVISORIES

WI...None. LM...Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646 until 1 PM Sunday.