North Iowa Severe Weather Today: Tornadoes, 80 MPH Winds, Flash Flooding Possible Through Friday

Mason City, Iowa — North Iowa is under a severe weather watch zone today, July 2, 2026, as the National Weather Service in Des Moines tracks two rounds of potential severe storms — one late tonight and another Friday evening, July 3. Damaging wind gusts up to 80 mph, isolated tornadoes, large hail, and flash flooding are all possible across the Mason City area this week.

North Iowa Severe Storm Risk Today and Tonight

Forecasters have placed the Mason City area under a Level 2 out of 5 risk — a “slight risk” — for scattered severe storms. A smaller area to the north, closer to Sioux Falls and Spencer, carries a higher Level 3 risk, while much of southern Iowa sits at a Level 1.

Timing is split into two windows:

• 1 p.m. to 10 p.m. today: Low chance of severe storms
• 10 p.m. tonight through the overnight hours: Better chance of severe storms

Any storms that develop are expected to move to the east at 25 to 35 mph.

Hazards to watch for:

• Tornadoes: Possible, mainly north of Highway 30
• Damaging winds: The primary threat — isolated gusts up to 80 mph are possible in the hatched risk area, which includes Mason City
• Large hail: A secondary threat, with hail up to 1 to 1.5 inches in diameter possible in the strongest storms

Friday, July 3 Severe Storm Outlook for North Iowa

A second round of scattered severe storms is possible Friday, July 3, mainly during the evening hours. North Iowa, including Mason City, remains in the Level 2 “slight risk” category. Damaging wind and heavy rain are listed as the primary hazards, with an isolated tornado or large hail possible as secondary threats.

Flash Flood Risk for North Iowa This Week

Beyond the severe storm threat, the Weather Service is highlighting a flash flood risk for both Thursday and Friday. North Iowa falls under a Level 2 “scattered flash floods possible” category on both days, with rainfall amounts generally expected in the 1- to 2-inch range and isolated higher totals possible. Local river and stream rises are also possible. Forecasters note chances for heavy rain continue into Saturday.

How to Stay Safe During North Iowa Storms

The Weather Service is urging residents to have multiple ways to receive warnings, including:

• On the go: Wireless Emergency Alerts, weather apps, and mobile.weather.gov
• At home: NOAA Weather Radio and local TV stations
• Outdoors: Outdoor warning sirens, smartphones, and a portable NOAA weather radio

Officials also emphasized lightning safety, noting that lightning can strike from as far as 10 miles away from a storm. Their advice: “When Thunder Roars, Go Indoors,” and “See a Flash, Dash Inside.” Recent lightning strike victims were reported to have been engaged in outdoor activities such as golfing, boating, running, grilling, walking, construction work, biking, gardening and swimming when they were struck.

Anyone with outdoor plans today or Friday is encouraged to stay weather aware, have a plan for indoor shelter, and monitor multiple sources for warnings as conditions evolve.