Hazardous Weather Outlook Summary

The National Weather Service has issued a Hazardous Weather Outlook for Dubuque and surrounding areas, valid through Tuesday, August 5, 2025. Key points include:

• Day One (July 30, Afternoon and Tonight): Scattered showers and thunderstorms are possible, particularly east of the Mississippi River, with lightning and heavy rainfall as the primary hazards. River flooding is ongoing due to prior heavy rainfall.

• Days Two through Seven (July 31 – August 5): River flooding is likely to persist on Thursday, July 31, due to previous heavy rainfall. Additional weather hazards may develop, but specific details for later days are not fully outlined in the outlook.

• Spotter Information: Spotter activation is not needed at this time.

Note: River flooding is a significant concern, particularly along the Cedar River and other area rivers. Residents should refer to the latest Flood Statements and Warnings for detailed information, as noted in the Hazardous Weather Outlook and flood warnings for nearby areas (e.g., Cedar River at Cedar Falls and Waterloo).

Day 1: Wednesday, July 30, 2025

• Day: Partly cloudy with a chance of scattered showers and thunderstorms, especially in the afternoon. High near 75°F. Winds ENE at 10–15 mph. Chance of rain 90%, with rainfall possibly exceeding 1 inch. Hazardous Weather: Lightning and heavy rainfall are possible, especially east of the Mississippi River.

• Night: Scattered thunderstorms, particularly after midnight, with cloudy skies. Low around 61°F. Winds NE at 10–15 mph. Chance of rain 50%. Hazardous Weather: Lightning and heavy rainfall remain concerns. Ongoing river flooding.

• Note: A Severe Thunderstorm Warning was issued for Dubuque and surrounding counties until 4:00 AM CDT on July 30, with wind gusts up to 60 mph and small hail possible.

Day 2: Thursday, July 31, 2025

• Day: Showers and thunderstorms likely, with potential for heavy rainfall. High around 74°F. Winds NE at 10–15 mph. Chance of rain 80%. Hazardous Weather: River flooding is likely to continue due to prior heavy rainfall.

• Night: Rain showers early, with clearing skies overnight. Low around 60°F. Winds NE at 5–10 mph. Chance of rain 40%.

• Note: Flood warnings are in effect for nearby rivers, such as the Cedar River at Cedar Falls (until August 5) and Waterloo (Thursday evening to Sunday morning), indicating a high risk of flooding impacting local areas.

Day 3: Friday, August 1, 2025

• Day: Partly cloudy with a mix of sun and clouds. High near 77°F. Winds NE at 10–15 mph.

• Night: Mostly clear. Low around 53°F. Winds NE at 5–10 mph.

• Hazardous Weather: River flooding may persist, though no specific thunderstorm or severe weather hazards are noted for this day.

Day 4: Saturday, August 2, 2025

• Day: Mostly sunny. High near 77°F. Winds ENE at 5–10 mph.

• Night: Mostly clear. Low around 53°F. Winds light and variable.

• Hazardous Weather: No specific hazards noted, but monitor for updates on river flooding.

Day 5: Sunday, August 3, 2025

• Day: Mostly sunny. High near 79°F. Winds ESE at 5–10 mph.

• Night: Partly cloudy. Low around 56°F. Winds light and variable.

• Hazardous Weather: No specific hazards noted, but ongoing river flooding may still be a concern.

Day 6: Monday, August 4, 2025

• Day: Partly cloudy with a slight chance of thunderstorms in the afternoon. High near 86°F. Winds S at 5–10 mph. Chance of rain 40%.

• Night: Partly cloudy with a chance of thunderstorms. Low around 69°F. Winds S at 5–10 mph. Chance of rain 40%.

• Hazardous Weather: Monitor for potential thunderstorm development, which could bring lightning and heavy rain.

Day 7: Tuesday, August 5, 2025

• Day: Partly cloudy with a slight chance of thunderstorms. High near 87°F. Winds SSW at 5–10 mph. Chance of rain 30%.

• Night: A few clouds. Low around 68°F. Winds SSW at 5–10 mph.

• Hazardous Weather: Monitor for potential thunderstorms. River flooding may still be a concern, particularly along the Cedar River, as flood warnings extend to this date for nearby areas.

River Flooding: The Hazardous Weather Outlook emphasizes ongoing river flooding, particularly on Thursday, July 31. Flood warnings for the Cedar River at Cedar Falls (until August 5) and Waterloo (Thursday evening to Sunday morning) indicate minor flooding, with potential impacts to local roads and infrastructure. Residents should avoid flooded roads and monitor updates from the National Weather Service (weather.gov/desmoines/water).

• Severe Weather Risk: Recent Severe Thunderstorm Warnings for Dubuque (July 29–30) indicate a risk of strong winds (up to 70 mph) and small hail, suggesting that additional severe weather could develop. Stay alert for updates, especially on July 30 and July 31, when thunderstorm activity is most likely.

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