A powerful line of thunderstorms swept across Minnesota and into the Twin Cities early Saturday morning, August 9, 2025, unleashing heavy rain, frequent lightning, and hail that left thousands of residents in the dark. The weather system prompted a series of severe weather alerts from the National Weather Service (NWS), underscoring the importance of public preparedness during volatile weather events.
The event began Friday evening when the NWS issued a Severe Thunderstorm Watch at 9:45 p.m. for a large portion of Minnesota, including the Twin Cities metro. The watch indicated that conditions were favorable for storms capable of producing damaging wind gusts exceeding 60 mph, hail between one and two inches in diameter, and an isolated tornado. As a cold front plowed through the state overnight, these conditions materialized into an active storm system.
By 1:40 a.m. Saturday, the storms intensified, leading local NWS offices to issue specific Severe Thunderstorm Warnings for areas in cabin country, such as Pequot Lakes and Crosslake, as well as for the Elk River and Monticello area. As the system moved southeast, it brought torrential downpours, with some locations experiencing rainfall rates of approximately two inches in just 30 minutes, raising concerns about potential flash flooding.
The storms began impacting the Twin Cities metro around 3:50 a.m., waking residents with loud thunder and near-constant lightning. Reports of hail emerged from downtown Minneapolis, while the city of Plymouth recorded about two inches of rain. The intense weather took a toll on the power grid, with Xcel Energy reporting that about 2,000 customers were without power at 4:20 a.m. This number grew significantly as the storm peaked, reaching approximately 12,000 customers by 5:25 a.m., according to reports from FOX 9.
In response to the storm’s persistence, the NWS extended the Severe Thunderstorm Watch until 6 a.m. Saturday and expanded its area to include parts of northwest Wisconsin.
Understanding Weather Alerts: Watch vs. Warning
Events like this highlight the critical difference between a weather “watch” and a “warning,” terms used by the National Weather Service to convey different levels of urgency.
- A Severe Thunderstorm Watch means that conditions are favorable for severe thunderstorms to develop in and near the designated area. It is a call to “Be Prepared!” and serves as an alert to stay informed and have a safety plan ready.
- A Severe Thunderstorm Warning means a severe thunderstorm has been observed by spotters or indicated by radar, posing an imminent danger to life and property. This is a signal to “Take Action!” immediately by seeking shelter.
According to the NWS, a thunderstorm is officially classified as severe if it produces wind gusts of at least 58 miles per hour or hail of one inch in diameter or larger. The primary hazards associated with these storms include damaging winds, large hail, flash flooding from heavy rain, and dangerous lightning.
Safety and Weekend Outlook
Emergency officials advise residents to have multiple ways to receive weather alerts, such as mobile apps and NOAA Weather Radio. During a warning, the safest course of action is to move to an interior room on the lowest floor of a sturdy building, staying away from windows. It is also crucial to never drive through flooded roadways, as it is difficult to gauge water depth, and moving water can quickly sweep a vehicle away.
Following the turbulent morning, the forecast for the remainder of the weekend shows improvement. Skies are expected to clear throughout Saturday, which will remain warm and muggy with highs in the mid-80s. Sunday is forecast to be mostly sunny and less humid, with temperatures holding steady in the mid-80s before additional chances for rain return later in the week.
