Sioux Falls Weather Forecasts

WASHINGTON (AP) — Everything had to come together just perfectly to create the killer tornado in Moore, Okla.: wind speed, moisture in the air, temperature and timing. And when they did, the awesome energy released over that city dwarfed the power of the atomic bomb that leveled Hiroshima.

In the aftermath of the devastating tornado that hit Moore, Okla., yesterday (May 20), search-and-rescue dogs are on the ground hunting for survivors amidst the rubble.

Monday's deadly twister in Moore, Okla., struck a devastating blow to a region hit by five tornadoes in 15 years, including the strongest tornado ever recorded.

A monstrous tornado that ripped through Oklahoma Monday (May 20) piling cars on top of one another, demolishing an elementary school and killing several adults and children, may owe its power and deadliness partly to a convergence of jets of air, say meteorologists.

MOORE, Okla. (AP) — The state medical examiner's office has revised the death toll from a tornado in an Oklahoma City suburb to 24 people, including nine children.

OKLAHOMA CITY (Reuters) - Officials in Oklahoma City said on Tuesday that 24 bodies were recovered after a devastating tornado tore through Moore, Oklahoma, a sharp decline from the 51 deaths they previously reported. "We have got good news. The number right now is 24," said Amy Elliott, chief administrative officer at …

“Disasters such as the Oklahoma tornadoes can cause fear, anxiety and stress in children, which can last long after the initial impact," said Carolyn Miles, president and CEO for Save the Children.

President Barack Obama pledged the government's full support to help Oklahoma recover from the tornado that has flattened communities and left dozens of people injured or dead.

A deadly tornado hit suburban Oklahoma City on Monday. A quick look at some basic facts:

WASHINGTON — If an extreme solar storm aimed at the Earth hits in just the right way, it could put interconnected electrical grids around the world at serious risk, experts say.

NORMAN, Okla. (AP) — More severe weather is in the forecast for parts of the central United States already reeling from powerful tornadoes this week.

MOORE, Okla. (AP) — The parents and guardians stood in the muddy grass outside an Oklahoma City area church, listening as someone with a bullhorn called out the names of children who were being dropped off — survivors of a deadly tornado that barreled through their community.

MOORE, Okla. (AP) — I left the office in Oklahoma City as soon as I saw the tornado warnings on TV. I had photographed about a dozen twisters before in the past decade, and knew that if I didn't get in my car before the funnel cloud hit, it would be too late.

LONDON — The first British astronaut ever to visit the International Space Station will launch in 2015 for a six-month mission that may involve spacewalks, wrangling visiting robotic spacecraft and space experiments, the UK Space Agency announced today (May 20).

Eye-popping images of celestial wonders shining over equally stunning Earth views have won the top spots in the 2013 International Earth and Sky Photo Contest, competition organizers say.

SHAWNEE, Okla. (AP) — When Lindsay Carter heard on the radio that a violent storm was approaching her rural Oklahoma neighborhood, she gathered her belongings and fled. When she returned, there was little left of the community Carter had called home.

A psychological warfare program centered on vomit could help save the marbled murrelet, an endangered seabird that nests in California's old-growth redwood forests.

SAN MATEO, Calif. — The word "drone" tends to conjure up images of planes that kill terrorists or of creepy surveillance tools.