FloodZoneMap.org

Flash Flood — St. Louis, MN

Jun 21, 2025

A complex of thunderstorms moved across the Northland the night of the 20th into the 21st. A warm front was draped across the region and led to a first round of storms moving to the northeast. This was quickly followed by an eastward moving line of storms. Large to very large hail was seen with the first line of storms including a 3 inch hail report just south of Grand Rapids. The second line was more of a damaging wind producing system with a recorded gust of 61 mph at the Brainerd airport as t

Source: NOAA National Weather Service Storm Events Database (event 1268257). Narrative written by NWS staff at the time of the event.

Flood Risk Context for St. Louis, MN

This event is one of many recorded floods in St. Louis County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View St. Louis County flood data →

More Flood Stories

Flood$1.0M damage

St. Louis, MN · Jun 19, 2024

On Tuesday, June 18, 2024, a stationary surface front, in conjunction with an anomalously moist airmass over the Northland, resulting in widespread flash flooding.

Read the full account →
Flood$1.4M damage

St. Louis, MN · Jul 1, 2022

Spring snowmelt, record April precipitation and frequent May rain events led to strong hydrologic responses within the Rainy Lake basin. Namakan Lake, Kabetogama Lake and Rainy Lake rose above the flood of record during the months of May and June before subsiding in July and…

Read the full account →
Flash Flood$250K damage

St. Louis, MN · Sep 11, 2023

A flash flood event occurred in the Duluth area during the late evening of September 11th into the early morning hours of the 12th. An area of thunderstorms developed over Duluth during the evening hours and continued to backbuild over the hillside for a few hours before another…

Read the full account →
Flash Flood$100K damage

St. Louis, MN · Jun 18, 2024

On Tuesday, June 18, 2024, a stationary surface front, in conjunction with an anomalously moist airmass over the Northland, resulting in widespread flash flooding.

Read the full account →