An atmospheric river made landfall in the Pacific Northwest during the morning of March 11, 2026, bringing heavy rain and snow across portions of Washington and Oregon. Forecasts show that the event will continue affecting the region through early March 14, producing significant precipitation totals, flooding concerns, and major winter weather impacts in mountainous terrain.
Winter Storm Warnings have been issued from the Rocky Mountains to the Upper Midwest and parts of the Northeast, with heavy snow, strong winds, and mixed precipitation forecast through March 14, 2026. Warnings will remain in effect from March 12 to 14 across much of Montana, Wisconsin, Michigan, Minnesota, and Maine, with more than 90 cm (3 feet) of snow forecast in some areas.
A powerful Kona low is bringing a multi-day flood and severe weather threat to Hawaii on Wednesday, March 11, 2026, with the most dangerous conditions forecast for Friday into Saturday. The National Weather Service says the storm could produce flash flooding, damaging winds, and strong to severe thunderstorms across the island chain, while Governor Josh Green has issued two emergency proclamations tied to the event.
A 15.2 cm (6 inches) wide hailstone was measured in Kankakee, Illinois, on March 10, 2026, after an intense supercell produced a corridor of giant hail across parts of northern Illinois, according to the National Weather Service (NWS) in Chicago. The agency said the stone may be considered for a new Illinois state record, but its status remains unofficial pending verification.
At least five people were reported dead across Indiana after severe storms triggered flooding and a destructive tornado between March 8 and 10, 2026. Two people were killed in Lake Village, Newton County, when a tornado destroyed multiple homes on March 10, while three others died in separate flooding incidents.
A destructive tornado struck Kankakee County, Illinois, during severe storms on March 10, 2026, causing significant structural damage and leaving more than 7 000 customers without power. The tornado tracked through the southwest portion of Kankakee and crossed into northwestern Indiana near Lake Village, damaging homes and infrastructure.
Two atmospheric rivers are forecast to hit the Pacific Northwest beginning late March 10, 2026, bringing heavy rainfall to coastal areas and significant snowfall to higher elevations in Washington and Oregon. Precipitation totals of 180–380 mm (7–15 inches) are forecast in mountainous regions, with the potential for river rises and localized flooding through the week.
The deadly tornado that struck Union City, Michigan, on March 6, 2026, was rated EF-3 after damage surveys by the National Weather Service (NWS). It is the earliest EF-3 recorded in Michigan and the strongest to strike the state in 49 years, with estimated peak winds exceeding 247 km/h (160 mph). Meanwhile, the tornado in Edwardsburg was rated EF-1, and an EF-2 rating was given to the Three Rivers tornadoes.
An Enhanced Risk of severe thunderstorms is in effect for parts of the Midwest on March 10, 2026, including northeast Missouri, southeast Iowa, northern and central Illinois, and northwest Indiana. The forecast environment supports the development of supercells and organized thunderstorm clusters capable of producing tornadoes, damaging wind gusts, and large hail during the afternoon and evening hours.
At least eight fatalities have been confirmed in parts of Michigan and Oklahoma as a severe weather outbreak spawned dozens of tornadoes across five states between March 5 and 6, 2026. Four fatalities were reported in Michigan and four were reported in Oklahoma, while injuries and widespread destruction were reported across the affected regions.
