38-day prolonged flood struck Wisconsin–Michigan border (May 19–June 26, 2026) near Green Bay from spring precipitation + snowmelt, causing river overflow and community displacement.
🌊 OPEN LIVE 3D WEATHER ALERTSA prolonged flood event designated "Green Flood" struck Wisconsin and Michigan from May 19 to June 26, 2026, centered near Green Bay (44.513°N, 88.013°W), causing widespread river overflow and community displacement. The 38-day inundation affected multiple watersheds across the Upper Great Lakes region, threatening residential areas, agricultural land, and critical infrastructure along the Fox River and its tributaries.
This extended flood resulted from a combination of heavy spring precipitation and snowmelt dynamics typical of northern temperate regions. The Fox River basin, draining approximately 4,660 square kilometers of Wisconsin lowlands, experiences peak discharge during May–June when snowpack from the Driftless Area and surrounding highlands converges with above-normal rainfall. Antecedent soil moisture—already elevated from spring thaw—reduced infiltration capacity, forcing runoff directly into river channels at rates exceeding channel conveyance limits.
Real-time precipitation radar, USGS streamflow gauges, and NOAA satellite imagery monitored discharge rates at 27 stations across the Fox River system, detecting anomalies when water levels exceeded 25-year flood stage benchmarks. Pandita's 3D flood visualization integrates SRTM elevation data with USGS discharge telemetry to model inundation extent and forecast hazard zones up to 7 days ahead.
Flash Flood vs. Prolonged: The Green Flood was a prolonged fluvial (river) flood, not flash—allowing 38 days for evacuation but creating water quality crises and agricultural losses. Vulnerable Areas: Communities within 2km of Fox River experienced property damage; agricultural zones lost crops to waterlogging. Historical Precedent: Similar multi-week floods occurred in 1993 (Upper Mississippi) and 1973 (Fox River itself).
Track this flood's evolution on Pandita Data's 3D flood simulation, updated hourly with USGS discharge data and satellite imagery from the affected region.