Pak Ou sits in Laos’s mountainous north, where the wet season from May through October brings substantial rainfall to steep, forested terrain, followed by a cooler, drier season from November through April.
Where the Nam Ou meets the Mekong near Luang Prabang, the town’s river confluence position ties its flood risk to both waterways. Because the region’s rivers are short and drop quickly through narrow valleys, heavy monsoon rain can trigger fast-rising streams and landslides with little warning, making radar an important tool for spotting a developing storm before it reaches villages in the valleys below. Learn more: Flash Flood Warning Signs on Radar · Open the full Rain Map