textproduct: Milwaukee/Sullivan

KEY MESSAGES

- Cooler and breezy conditions this weekend.

- Temperatures returning to above normal by mid-week next week

UPDATE

Issued 650 AM CDT Sat Apr 18 2026

No changes to the going forecast.

Sheppard

SHORT TERM

Issued 100 AM CDT Sat Apr 18 2026

Today through Sunday:

Showers along and ahead of a cold front will exit the east prior to daybreak, with decreasing clouds expected Sat morning. Breezy west to northwest winds gusting 25 to 35 mph are expected through the overnight hours and will also continue through the day today. Below normal temps today will likely not get out of the 40s this afternoon. Cool conditions will persist on Sunday under high pressure, though winds will be lighter.

DDV

LONG TERM

Issued 100 AM CDT Sat Apr 18 2026

Monday through Friday:

Temperatures will begin to warm back up Monday as high pressure heads eastward and southerly low level flow develops. Temps continue to warm Tuesday, with above normal highs around 70 likely. A cold front will drop through the area later Tue into Tue night, with somewhat cooler conditions likely Wednesday. The coolest temps Wed will be near Lake Michigan due to onshore winds.

Southerly low level flow will return late week, with above normal temps and increasing moisture expected Thursday and Friday. After a much needed break in rain, showers and storms may return to southern Wisconsin Thu night through Friday as low pressure and an associated cold front move through the region.

DDV

AVIATION

Issued 650 AM CDT Sat Apr 18 2026

MVFR cloud ceilings around 2,500 ft should slowly lift and scatter apart over southern WI through this morning. Some potential for stratocumulus clouds to redevelop and rebuild in coverage towards midday / this afternoon (SCT to BKN coverage), though the majority of those would be 3,000-6,000 ft in altitude, leaving most areas with predominantly VFR. Dry weather continues today. A trace / sprinkle of rain cannot be completely ruled out this afternoon, though the odds are < 25% and need not be mentioned in the TAF. Gusty west to northwest winds continue. Gusts to roughly 20-30 kt expected, a few stray gusts to 35 kt will be possible in the afternoon.

For this evening into tonight, decreasing clouds and decelerating winds. Winds remain light out of the west late tonight.

Sheppard

MARINE

Issued 100 AM CDT Sat Apr 18 2026

Showers and dense fog will remain possible over the lake until a cold front clears late tonight. Winds then become northwesterly behind the cold front by the early morning hours. Breezy northwesterly winds then continue Saturday through Sunday as low pressure lifts northward into Hudson Bay while deepening to 28.9 inches. Winds ease Monday morning as high pressure of 30.4 inches tracks southeast over the upper Great Lakes.

DDV

MKX WATCHES/WARNINGS/ADVISORIES

WI...None. LM...Small Craft Advisory...LMZ643-LMZ644-LMZ645-LMZ646 until 10 PM Saturday.