Recent developments in the atmosphere over the Caribbean Sea have led researchers at Colorado State University (CSU) to make slight improvements to their hurricane forecast for the 2025 Atlantic-basin season, in an update published Wednesday.

Triple-I non-resident scholar Phil Klotzbach, Ph.D., a senior research scientist in the Department of Atmospheric Science at CSU, and the CSU TC-RAMS research team are now predicting 16 total named storms through the end of the year, a small drop from their original forecast of 17.

“The primary reason for the slight decrease in our outlook is both observed and predicted high levels of Caribbean wind shear,” Klotzbach said. “High levels of Caribbean shear in June and July are typically associated with less active hurricane seasons.”

Klotzbach warned, however, that peak hurricane season – which typically occurs from mid-August through late October – could still be very active, despite current atmospheric conditions.

“The subtropical eastern Atlantic and portions of the tropical Atlantic are warmer than normal,” he said. “The current Atlantic sea surface temperature pattern is fairly similar to what we typically observe in July prior to active Atlantic hurricane seasons.”

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