National Weather Service United States Department of Commerce

Powerful Storm to Impact Eastern Third of U.S. this weekend.

A developing storm system will bring a myriad of significant impacts this weekend. Heavy snow up to 18 inches from the Ohio Valley to the Northeast, and ice up to a quarter of an inch is forecast in places. Heavy rain may cause flash flooding from the Mid-South to the Mid-Atlantic. Severe thunderstorms with damaging winds and isolated tornadoes will be possible in the Deep South. Read More >

South Dakota Tornado Warning Drill scheduled for Wednesday, April 25

A statewide tornado drill conducted for South Dakota between 9:00 and 9:30 am MDT (10:00 and 10:30 am CDT) on Wednesday, April 25, 2018. Because the exercise is used to ensure communications and warning systems are functioning properly before storm season, people will see and hear the actual alerts used for tornadoes. Communities may sound local warning sirens, although the sirens may not be heard inside homes and buildings, especially large office buildings, as they are intended to alert people who are outdoors away from radio or TV. Local emergency response agencies may practice their response procedures and schools will conduct safety drills for their students. 

The drill will also include a test of the Emergency Alert System, which will interrupt local media broadcasts. The scroll on television will look like a real warning, while the audio will be identified as a test.

Information on preparing for storms is on the Severe Weather Preparedness Week web page.  People may also contact their county emergency management office or the Black Hills Area Chapter of the American Red Cross for additional information.