NSSL The National Severe Storms Laboratory

Be a weather observer! Are raindrops falling on your head? Are you getting hassled by hail? Is snow glistening in your treetops? Citizen scientists around the world can submit weather observations and view reports on the go using the newest mPING app. Learn more→

Step into the wild world of weather! What is a wall cloud? What's the difference between a watch and a warning? Is it ever “too cold to snow”? Learn all about thunderstorms, tornadoes, hail, lightning, floods, damaging winds and severe winter weather at Severe Weather 101!

In a flash. Flash floods are a worldwide threat, and the #1 hazardous weather related killer in the United States. The primary goal of NSSL's FLASH project is to improve the accuracy, timing, and specificity of flash flood warnings in the US, thus saving lives and protecting infrastructure. Read more about flash flood research at NSSL →

End of an era. NOAA's National Weather Radar Testbed phased array radar, decommissioned on May 31 to make way for newer technology, was a tool aimed at developing faster and more accurate warning, analysis, and forecast techniques for severe and hazardous weather. Learn more about the history, achievements, and future of phased array radar research at NSSL →