National Weather Service United States Department of Commerce

Catastrophic Flooding Impacts in South-Central Texas

Widespread life-threatening flash and urban flooding will continue to pose a significant threat to life and property in south-central Texas. Catastrophic fiver flooding, with rapid rises on small streams, arroyos, and typically dry washes, is expected. Monsoonal showers persist across the Great Basin and Southwest with greatest flash flooding in southern Arizona. Read More >

May 9-11, 2015 featured a powerful spring low pressure system the wreaked havoc across South Dakota. Western and central parts of the state experienced heavy snow, eastern parts severe hail, and most everyone received very heavy and beneficial rainfall that put a dent in the drought. A few records were even set on May 10th for daily rainfall: Watertown with 1.38" (1.27" in 1936), Mobridge with 2.48" (0.86" in 1956), and Pierre with 1.52" (0.92" in 2010). Pierre also tied a record for most snow on the 10th - a trace. The same area that experienced thunderstorms and hail on the 10th observed a period of snow the very next morning! Below are several images that depict more of the details.

An EF-2 tornado also hit Delmont, SD at 10:45 am on Mother's Day, May 10th. Find much more information from the NWS office in Sioux Falls here