Severe storms in Colorado on Tuesday may bring large hail and isolated tornadoes
Strong to severe storms are expected along the I-25 corridor and across the eastern plains of Colorado on Tuesday.
CBS
Storm development is likely between noon and 2 p.m. across the high country and foothills, with storms pushing east through the afternoon and evening. For the Denver metro area, the main window for severe weather runs from noon to 5 p.m., with a lingering threat through 9 p.m. near the far eastern border.
File photo of a rain shower over the Great Plains in northeastern Colorado.
Marli Miller/UCG/Universal Images Group via Getty Images
All types of severe weather are possible, but the biggest concern is large hail, up to 2 inches in diameter or more.
That includes areas from Castle Rock to Fort Collins, and north toward the Wyoming state line. A brief tornado or two can't be ruled out.
CBS
Storms will be fueled by strong surface heating and dew points well into the 60s, providing plenty of moisture to work with.
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Live updates on Minnesota weather: Tornadoes reported as storms track into Twin Cities
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11 hours ago
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Severe thunderstorm warning issued for Fort Myers area; torrential rainfall blasting SWFL
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12 hours ago
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When you buy through links on our articles, Future and its syndication partners may earn a commission. Violent tornado outbreaks, like the storms that tore through parts of St. Louis and London, Kentucky, on May 16, have made 2025 seem like an especially active, deadly and destructive year for tornadoes. The U.S. has had more reported tornadoes than normal — over 960 as of May 22, according to the National Weather Service's preliminary count. That's well above the national average of around 660 tornadoes reported by that point over the past 15 years, and it's similar to 2024 — the second-most active year over that same period. I'm an atmospheric scientist who studies natural hazards. What stands out about 2025 so far isn't just the number of tornadoes, but how Tornado Alley has encompassed just about everything east of the Rockies, and how tornado season is becoming all year. 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The locations of these storms have also been notable: The 2025 tornadoes through May have been widespread but clustered near the lower and central Mississippi Valley, stretching from Illinois to Mississippi. That's well to the east of traditional Tornado Alley, typically seen as stretching from Texas through Nebraska, and farther east than normal. April through May is still peak season for the Mississippi Valley, though it is usually on the eastern edge of activity rather than at the epicenter. The normal seasonal cycle of tornadoes moves inland from near the Gulf Coast in winter to the upper Midwest and Great Plains by summer. Over the past few decades, the U.S. has seen a broad shift in tornadoes in three ways: to the east, earlier in the year and clustered into larger outbreaks. Winter tornadoes have become more frequent over the eastern U.S., from the southeast, dubbed Dixie Alley for its tornado activity in recent years, to the Midwest, particularly Kentucky, Illinois and Indiana. Meanwhile, there has been a steady and stark decline in tornadoes in the "traditional" tornado season and region: spring and summer in general, especially across the Great Plains. It may come as a surprise that the U.S. has actually seen a decrease in overall U.S. tornado activity over the past several decades, especially for intense tornadoes categorized as EF2 and above. There have been fewer days with a tornado. However, those tornado days have been producing more tornadoes. These trends may have stabilized over the past decade. This eastward shift is likely making tornadoes deadlier. Tornadoes in the Southeastern U.S. are more likely to strike overnight, when people are asleep and cannot quickly protect themselves, which makes these events dramatically more dangerous. The tornado that hit London, Kentucky, struck after 11 p.m. Many of the victims were over age 65. The shift toward more winter tornadoes has also left people more vulnerable. Since they may not expect tornadoes at that time of year, they are likely to be less prepared. Tornado detection and forecasting is rapidly improving and has saved thousands of lives over the past 50-plus years, but forecasts can save lives only if people are able to receive them. This shift in tornadoes to the east and earlier in the year is very similar to how scientists expect severe thunderstorms to change as the world warms. However, researchers don't know whether the overall downward trend in tornadoes is driven by warming or will continue into the future. Field campaigns studying how tornadoes form may help us better answer this question. For safety, it's time to stop focusing on spring as tornado season and the Great Plains as Tornado Alley. Tornado Alley is really all of the U.S. east of the Rockies and west of the Appalachians for most of the year. The farther south you live, the longer your tornado season lasts. Forecasters say it every year for hurricanes, and we badly need to start saying it for tornadoes too: It only takes one to make it a bad season for you or your community. Just ask the residents of London, Kentucky; St. Louis; Plevna and Grinnell, Kansas; and McNairy County, Tennessee. Listen to your local meteorologists so you will know when your region is facing a tornado risk. And if you hear sirens or are under a tornado warning, immediately go to your safe space. A tornado may already be on the ground, and you may have only seconds to protect yourself. This edited article is republished from The Conversation under a Creative Commons license. Read the original article.
