Real-time coverage of floods event — Green Flood in Canada from: 13 Apr 2026 01 to: 20 Apr 2026 01. — Pandita Data.
🌊 OPEN LIVE 3D WEATHER ALERTSA significant flood event is unfolding across the Green River watershed in Quebec, Canada, from April 13–20, 2026. Located at 48.406°N, 71.069°W—in the Outaouais region near Gatineau—this flood stems from rapid spring snowmelt combined with heavy precipitation. Regional water authorities have issued flood warnings for riverside communities, with evacuation alerts in low-lying areas. The event poses immediate risks to infrastructure, agriculture, and populated zones downstream.
Spring floods in eastern Canada are driven by a predictable but dangerous confluence of factors. Warm air masses move northward in April, rapidly melting the accumulated winter snowpack across the Canadian Shield. This snowmelt—often 10–30 cm of water equivalent over 7–14 days—creates a sudden surge of runoff into tributary networks. When this surge coincides with rain events (as in the Green River system), channel capacity is exceeded, and water spreads across floodplains.
The Green River basin, a sub-watershed of the Ottawa River system, drains terrain with moderate relief and clay-rich soils that retain water poorly. Snowmelt runoff cannot infiltrate quickly enough, forcing it into channels already saturated from winter precipitation. In urbanized and agricultural areas, impervious surfaces (concrete, roads, parking lots) accelerate runoff generation, reducing lag time between rainfall and peak discharge. By April 13, 2026, regional precipitation combined with melt rate peaks pushed discharge to flood stage—typically 2–3 times normal springtime flow.
Pandita Data's hydrological monitoring integrates real-time satellite precipitation data from NOAA and water-level sensors from Environment and Climate Change Canada (ECCC). Synthetic Aperture Radar (SAR) satellites detect standing water and inundated terrain with precision regardless of cloud cover—critical in spring flood season when cloud persists. Optical imagery from Landsat and Sentinel-2 measures snowpack extent and melt progress. Stream gauge networks along the Green and Ottawa Rivers feed live discharge measurements into our 3D flood simulation, which models water extent, depth, and flow velocity across 10 m resolution DEMs (digital elevation models). Users can visualize where peak flow will occur and how floodwater propagates downstream over the 7-day event window.
Canada Spring Floods: Spring floods are the nation's costliest recurring natural disaster, averaging CAD $500 million in damages annually. The Outaouais region has experienced four major floods in the past 20 years (2008, 2017, 2019, 2023). Riverside communities are particularly vulnerable; mobile home parks and basement dwellings face 1–2 m inundation during peak events. Contaminated floodwater poses health risks via bacteria, sewage, and industrial pollutants. Agricultural losses are severe in the Ottawa Valley, with crop damage and soil erosion affecting yields for years.