Tropical Storm Grace formed in the eastern Caribbean on Saturday morning, generating tropical storm warnings for Puerto Rico, the U.S. Virgin Islands and other parts of the Caribbean, the National Hurricane Center said.
The storm was moving west at 22 miles per hour with maximum sustained winds of 40 m.p.h., the center said in an advisory at 8 a.m., adding that Grace was about 355 miles east-southeast of the Leeward Islands. The center said Grace was “small” but “moving quickly.”
Other islands with tropical storm warnings include the British Virgin Islands, St. Kitts and Nevis, and Antigua and Barbuda, the center said.
The storm was expected to move over the Leeward Islands on Saturday night before getting to the Virgin Islands and Puerto Rico on Sunday.
Parts of the Virgin Islands, the Leeward Islands and Puerto Rico could expect three to six inches of rain, the center said, along with flash flooding. The storm was expected to dump rain on Florida next week.
Grace is the seventh named storm of the 2021 Atlantic hurricane season, following several days of floods and power outages unleashed this week by Fred, the sixth named storm of the season. Fred had weakened to a tropical depression on a slow march through the Caribbean, and was expected to slowly gain strength on Saturday and become a tropical storm again as it approached the Florida Keys, the center said.
The links between hurricanes and climate change are becoming more apparent. A warming planet can expect to see stronger hurricanes over time, and a higher incidence of the most powerful storms — though the overall number of storms could drop, because factors like stronger wind shear could keep weaker storms from forming.
Hurricanes are also becoming wetter because of more water vapor in the warmer atmosphere; scientists have suggested storms like Hurricane Harvey in 2017 produced far more rain than they would have without the human effects on climate. Also, rising sea levels are contributing to higher storm surge — the most destructive element of tropical cyclones.
Extreme Weather
A major United Nations climate report released in August warned that nations have delayed curbing their fossil-fuel emissions for so long that they can no longer stop global warming from intensifying over the next 30 years, leading to more frequent life-threatening heat waves and severe droughts. Tropical cyclones have likely become more intense over the past 40 years, the report said, a shift that cannot be explained by natural variability alone.
Ana became the first named storm of the season on May 23, making this the seventh year in a row that a named storm developed in the Atlantic before the official start of the season on June 1.
In May, scientists with the National Oceanic and Atmospheric Administration forecast that there would be 13 to 20 named storms this year, six to 10 of which would be hurricanes, and three to five major hurricanes of Category 3 or higher in the Atlantic. In early August, in a midseason update to the forecast, they continued to warn that this year’s hurricane season would be an above average one, suggesting a busy end to the season.
Matthew Rosencrans of the National Oceanic and Atmospheric Administration said that an updated forecast suggested that there would be 15 to 21 named storms, including seven to 10 hurricanes, by the end of the season on Nov. 30.
Last year, there were 30 named storms, including six major hurricanes, forcing meteorologists to exhaust the alphabet for the second time and move to using Greek letters.
It was the highest number of storms on record, surpassing the 28 from 2005, and included the second-highest number of hurricanes on record.
Alyssa Lukpat contributed reporting.
