textproduct: Milwaukee/Sullivan

KEY MESSAGES

- Rain (60-90+ percent chances) continues through dawn.

- Milder Friday and Saturday before 70s return Sunday and into next week.

- An active weather pattern returns late this weekend into next week. Warm and humid conditions and more showers and storms are expected. Severe storms will be possible.

SHORT TERM

Issued 1146 PM CDT Thu Apr 9 2026

Current Overnight through Saturday Night:

Rain will continue through the overnight hours largely clearing out by dawn as the surface trough shifts east into the Lower Great Lakes region. High pressure is then expected to push in this morning, leading to gradual clearing from northwest to southeast through the day. Surface winds will largely be northwesterly to northerly and weak CAA will cause high temperatures to dip slightly today into the low to mid 50s.

High pressure and mostly clear to partly cloudy skies will linger into the first half of Saturday before skies cloud over Saturday afternoon and upper level WAA brings elevated rain showers back to the region. Best chances for rain should occur Saturday night (60-90% chances) as the core of an 850mb jet leans over into the region ahead of a large trough over the western United States.

CMiller

LONG TERM

Issued 1148 AM CDT Thu Apr 9 2026

Sunday through Wednesday:

With strong WAA over the region on Sunday, a warm front is anticipated to move north into Wisconsin through the day. Temps should rise into the low 70s with dew points near 60. As the warm front pushes in, WAA may drive continued rain showers through the morning and some potential for weak thunderstorms during the afternoon, with the RRFS hinting that we may have some available CAPE <1000 j/kg during the afternoon.

Beyond, a multi-day period of active weather looks to set up. The Storm Prediction Center includes at least some of our CWA in an outlook for days 5, 6, and 7. The aforementioned warm front is expected to become a stationary front over the region late Sunday, with multiple potent waves propagating along the front Monday through Wednesday, until a larger surface low kicks the front through on Thursday of next week. Given the surface frontal trigger, surface moisture and warmth south of the front, and upper level support, severe weather appears possible. However, it is still too early to pin down the timing and location of the most severe storms, as global model solutions vary widely. Stay tuned through the weekend as the hazards for next week become clearer with time.

CMiller

AVIATION

Issued 1132 PM CDT Thu Apr 9 2026

Rain continues across southern WI tonight. Ceilings have mostly stayed in the VFR to MVFR range, but upstream obs suggest those ceilings will come down to MVFR and IFR with time tonight. Some vis restriction will be likely with the rain, especially with heavier pockets. Winds will remain light and northerly to northeasterly.

Rain ends near dawn on Friday, with ceilings rising to high MVFR/low VFR through the morning and scattering out as we head into the afternoon.

CMiller

MARINE

Issued 1129 PM CDT Thu Apr 9 2026

A stationary front will remain just south of Lake Michigan through Friday, leading to continued light to moderate north winds. High pressure will then build over the Upper Great Lakes Region Friday night into Saturday morning, causing winds to become light and variable. Southeast winds return Saturday afternoon and become gusty Saturday night as a sharper pressure gradient moves over the lake as low pressure moves into the northern Great Plains.

CMiller

MKX WATCHES/WARNINGS/ADVISORIES

WI...None. LM...None.