Winter weather warning announced
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Millions of Americans in the Northeast were facing stormy conditions beginning on Thursday and persisting into Friday.
At the lowest level you have a watch. The National Weather Service says a watch is used when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location or timing is still uncertain.
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How to read weather alerts like a meteorologist
Understanding the Watch, Warning, and Advisory Hierarchy Let's be real, the National Weather Service throws around terms like watch, warning, and advisory, and most people just know something bad is coming.
National Weather Service (NWS) meteorologists issued a sudden tornado warning and severe thunderstorm warnings in St. Louis, Missouri, late Thursday morning, urging roughly 150,000 people within the forecast area to seek immediate shelter.