Weather Words: Training | Weather.com
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Weather Words: Training

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When you hear the word “training” in terms of weather, don’t think of it as training for a marathon, but rather train cars on a rail line. Sometimes storms can mimic train cars by following the same path one after another. This can easily set up a very dangerous flash flooding situation.

There are times when heavy downpours come down with rainfall rates of several inches an hour. If storms are training, then this can last for several hours or more. That’s when flash flooding and river flooding often can occur.

This infrared imagery shows where the most intense storms set up across the New York City area on September 28, 2023 as remnants from Tropical Storm Ophelia sat over the region for more than 12 hours.
(NOAA)
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Training storms are sometimes hard to predict. Meteorologists won’t always know where training storms are going to set up until a storm system is already unfolding. In 2023, for example, remnants of Tropical Storm Ophelia caused storms to train right over New York City, unleashing more than eight inches of rain over the city. Water poured into subways, schools, basements and vehicles, and the torrential rains didn’t let up for nearly 12 hours.

Urban areas are especially vulnerable to flooding from training storms. For one, there is so much concrete, water has very few places to drain and many times drainage systems aren’t able to handle the amount of water flooding into the streets.

J​ennifer Gray is a weather and climate writer for weather.com. She has been covering some of the world's biggest weather and climate stories for the last two decades.

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