The hurricane center issued a tropical storm watch for the Florida Keys, from Craig Key westward to the Dry Tortugas. The watch means tropical storm conditions, including sustained winds of at least 39 mph, are possible within 48 hours.
Tropical storm winds will likely reach South Florida Sunday night into Monday morning. The exact track and intensity of the storm are still somewhat uncertain.
However, there is growing confidence that the storm will track near or up the western coast of Florida, first moving through the Florida Keys on Monday and then reaching northern parts of Florida by Wednesday.
Florida Gov. Ron DeSantis issued a state of emergency for 15 counties on Saturday ahead of Elsa. He encouraged residents to begin preparation efforts, including stocking their disaster supply kits with a week’s worth of supplies and coming up with a disaster plan.
“We’re preparing for the risk of isolated tornadoes, storm surge, heavy rainfall and flash flooding,” DeSantis said.

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The state of emergency covers Charlotte, Citrus, Collier, DeSoto, Hardee, Hernando, Hillsborough, Lee, Levy, Manatee, Miami-Dade, Monroe, Pasco, Pinellas and Sarasota counties.
What’s expected
A tropical storm warning is in effect for the coast of Haiti north of Port Au Prince, the southern coast of Dominican Republic from Punta Palenque to the border with Haiti, 10 provinces in Cuba and Jamaica.
Heavy rain is expected in parts of Dominican Republic, Haiti and Jamaica through Sunday, with 4 to 15 inches possible, perhaps leading to scattered flash flooding and mudslides, according to the hurricane center.
The hurricane center said Elsa is forecast to move near the southwestern peninsula of Haiti over the next few hours, and then move near Jamaica and portions of eastern Cuba on Sunday. Rainfall of 5 to 15 inches is possible over parts of Cuba from Sunday through Monday.
“Little change in strength is forecast through tonight, but gradual weakening is forecast on Sunday and Monday when Elsa is expected to be near or over Cuba,” according to the hurricane center.
Significant flash flooding and mudslides are possible in Cuba, especially across the more mountainous regions.
The Cayman Islands also could receive 3 to 6 inches of rain Sunday through Monday, according to the hurricane center.
Elsa’s path toward US coast is less certain
After Sunday, the forecast for the US coast, including Florida, is more uncertain. The hurricane center says that Elsa is expected to move across central and western Cuba on Monday and then head toward Florida.
Based on the latest forecast track, Elsa could start bringing winds and rain to the Florida Keys and southwestern Florida by Monday night as a tropical storm. It then could track along Florida’s west coast early next week.
The hurricane center forecasts Elsa will bring 2 to 6 inches of rain to portions of the Florida Keys and southern Florida.
But even the storm’s center tracks toward western Florida, the southeastern Florida community of Surfside is “still going to possibly see some impacts, even if it’s just some of the outer bands” of rain and wind by Tuesday or Wednesday, CNN meteorologist Tyler Mauldin said.
Otherwise, Elsa’s winds could topple the structure unsafely, officials said.
The ports remain open to commercial traffic but the Coast Guard warned that “drawbridges may not be operating if sustained winds reach 25 mph or when an evacuation is in progress.”
Elsa was the first hurricane of the 2021 Atlantic season, and the third named storm to pose a threat to the US coast.
CNN’s Melissa Alonso and Jackson Dill contributed to this report.