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Elev 660 ft, 42.48 °N, 87.82 °W

Winthrop Harbor, IL Severe Weather Alertstar_ratehome

icon69 Â°F Winthrop Harbor Station|Report|Change
Current Station
Personal Weather Station
Location: Winthrop Harbor, IL
Elevation: 660ft
Nearby Weather Stations

Active Weather Alerts

Small Craft Advisory
Issued: 7:45 PM May. 3, 2026 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 30 kt
expected.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...Now until 7 PM CDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

River Flood Warning
Issued: 3:02 PM May. 3, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL EARLY TUESDAY AFTERNOON...

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.

* WHEN...Until early Tuesday afternoon.

* IMPACTS...At 10.0 feet, Winaki Trail and Onaway Trail are
threatened south of Algonquin. Athletic fields inundated at Judson
College in Elgin.

* ADDITIONAL DETAILS...
- At 9:30 AM CDT Sunday the stage was 10.2 feet.
- Recent Activity...The maximum river stage in the 24 hours
ending at 9:30 AM CDT Sunday was 10.6 feet.
- Forecast...The river is forecast to continue to gradually
fall through the middle of the week.
- Flood stage is 9.5 feet.
- Flood History...This crest compares to a previous crest of
9.4 feet on 07/18/2024.
- http://www.weather.gov/safety/flood

&&



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