Milwaukee

Milwaukee Faces Weather Whiplash, NWS Warns of Flooding, Thunderstorms, and Heat Surge

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Published on August 15, 2025
Milwaukee Faces Weather Whiplash, NWS Warns of Flooding, Thunderstorms, and Heat SurgeSource: Google Street View

Milwaukee residents, brace yourselves for a weather roller coaster over the coming days. The National Weather Service in Milwaukee has issued a Hazardous Weather Outlook outlining the potential for continued flooding, bouts of thunderstorms, and a brief spike in heat and humidity levels that will grip the region starting today and stretching into next week.

As of Friday morning, the Fox River in Waukesha is still above flood stage and is expected to stay that way until Saturday morning, which could cause some local flooding. In Milwaukee, today will be sunny with a high of 87°F. Later tonight, after 3 a.m., there’s a 30% chance of showers and storms, possibly bringing heavy rain and strong winds, according to the National Weather Service.

Looking ahead to the weekend, Saturday holds a potential repeat of tonight’s weather, with a 30 percent chance of rain and thunderstorms during the day, possibly climbing to 50 percent at night. The National Weather Service advises the public to stay prepared for successive storms, specifically calling out the threat of "locally heavy rainfall, particularly in locations experiencing repeated rounds of storms." Despite the rain risks, the weather on Saturday is predicted to peak at 89 degrees, dialing up the heat for anyone outdoors.

Sunday's forecast scales back the thunderstorm probability to 20 percent, with mostly cloudy skies tempering the temperature to a high near 79. But the respite is short-lived, with a 30 to 50 percent chance of showers and thunderstorms roaring back into the forecast from Sunday night through Tuesday. The mercury scale will hover around the low 80s for both daytime highs and dip to the upper 60s for nighttime lows, except for Tuesday night, where it is expected to slide to around 65 degrees, as reported by the National Weather Service.

Closing the week, Wednesday and Thursday offer a reprieve from the storms as the weather makes a milder turn with highs of 77 and 79 degrees, respectively. But even as the skies clear, the National Weather Service Milwaukee highlights, the importance of rain reports from the Community Collaborative Rain, Hail & Snow Network (CoCoRAHS), stating, "CoCoRAHS rainfall reports will be appreciated through next week." Milwaukee, prepare your umbrellas, and keep your rain gauges ready – it seems the skies have more than a few summer showers in store.