Vieng Xai 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.
Known for its historic wartime caves, this Houaphanh province town sits in mountainous terrain where heavy rain can trigger fast-rising streams. 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