Caitlin Kaiser is a digital meteorologist at weather.com. Read full biography
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Hurricane season maps tracker: cones, water temperatures and more
The maps you need to monitor the tropics, including Tropical Depression Nine in the Atlantic and Rachel in the Pacific.
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Cooldown ahead for West
Cooldown ahead for West
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Why fall flips the switch on how storms move across the country
Storms start moving faster across the country every fall, and a strengthening, southward-shifting jet stream is the reason why. As the temperature gap between the poles and the tropics grows, this fast-moving ribbon of air becomes wavier and more powerful — kicking severe weather back into gear. Meteorologist Caitlin Kaiser breaks it down here.
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More From Caitlin Kaiser

West heat dome: When could California finally see relief?
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Why the danger from tropical systems doesn't end at the coast
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October heat wave brings scorching temperatures to millions in West
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Why that leaf pile in your yard could be crawling with ticks
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Leaf piles are a fall favorite, but ticks love them too
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WMO's 2027 calendar photo contest winners show nature's wild side
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This New Hampshire railroad has the best fall foliage views
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Your next taste of fall
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Another blast of fall weather is headed for the East next week
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El Niño’s impact on your winter
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El Niño winter impacts: Will your area be warmer, drier or wetter?
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Cheap fixes that could cut your heating bill by 10% this winter
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