- Isaias will follow near the east coast of Florida until Sunday evening.
- Rain bands, tropical storm force winds, and storm surge flooding are potential impacts.
- It will then head to the Carolinas later Monday and Monday evening in the form of a tropical storm.
- The tropical storm will cross the northeast from Tuesday to Wednesday.
Tropical Storm Isaias (ees-ah-EE-ahs) will crawl north near the east coast of Florida until Sunday evening before heading to the Carolinas and on the east coast to northern New England at the start of this week.
Isaias continues to struggle with dry air and wind shear and is now unlikely to regain the intensity of hurricanes. But the tropical storm will still bring heavy rains, gusty winds and storm surges flooding parts of the east coast.
Watches, Warnings and Current Conditions
(PLUS: Hurricane season terms you should know)
Tropical storm warnings and watches are in effect from parts of the east coast of Florida to southeastern North Carolina. The latest warnings and watches are shown on the map below.
Isaias is currently centered just off the south coast of Florida. However, much of the storm’s precipitation is east of its center of circulation.
Florida’s east coast can expect bands of rain and strong, gusty winds as Isaias heads north on Sunday.
Isaias is expected to maintain its intensity as a strong tropical storm as it moves from eastern Florida near or off the southeast coast through Monday. The traffic center is expected to land permanently Monday night or early Tuesday in South Carolina or southeastern North Carolina.
From there, the storm will move rapidly northeast near parts of the northeast coast to north to New England from Tuesday to Wednesday.
(PLUS: Depth forecast for the central Atlantic and northeast)
Isaias produces strong gusts of wind and bands of heavy rain over the northern Bahamas and increasingly over southern Florida.
Eastern Florida could see tropical storm conditions (winds 39 to 73 mph) spread north through Sunday evening. These conditions will shift to coastal Georgia and South Carolina on Monday, followed by North Carolina on Monday evening and Tuesday.
Keep in mind that the winds will be strongest near the coast and in tall buildings.
There could be scattered power outages and tree damage in areas subject to stronger wind gusts.
Here’s what the wind field could look like in 12 hours with the strongest gusts hitting the Florida coast.
A dangerous storm surge is possible along the east coast of Florida and parts of the Carolinas.
Storm surge watches were issued from Jupiter Inlet in Ponte Vedra, Florida, and from Edisto Beach, South Carolina, to Cape Fear, North Carolina. A storm surge of 2 to 4 feet above ground level is possible if the peak wave occurs at the time of high tide.
The most worrying high tide in eastern Florida is Sunday evening. In the Carolinas, the Monday night high tide could have the highest water levels.
The swells generated by Isaias arrive along the southeastern coast of the United States, causing high waves and the danger of rip currents. The surf will remain high until the Isaias pass.
Isaias has the potential to produce the following precipitation totals along its path early this week, according to the National Hurricane Center.
-East Florida: 2-4 inches, with maximum isolated totals of 6 inches.
-Northeast Florida and Georgia Coast: 1 to 3 inches
-Carolinas and Mid-Atlantic: 2 to 5 inches, with maximum isolated totals of 7 inches
-Southeast New York and much of New England: 2 to 4 inches, with isolated maximum totals of 6 inches.
Heavy rains could trigger flash floods in some of these areas. Isolated minor to moderate river floods are also possible in parts of the eastern states.
To learn more about the possible impacts in the Mid-Atlantic and Northeast, read our latest discussion here.
Isaias could also cause short-lived tornadoes along its path along the east coast.
An isolated threat is possible from late Monday and early Tuesday from the coast of South Carolina to eastern North Carolina and the far southeast of Virginia.
The risk of an isolated tornado could spread to the mid-Atlantic and northeast coasts from Tuesday to Tuesday evening.
History of the storm
Isaias is the earliest named ninth Atlantic tropical cyclone on record. The previous record was Irene on August 7, 2005.
Typically, the ninth named tropical system occurs in the Atlantic Basin in early October, meaning this year’s pace is more than two months ahead of average.
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Heavy rains caused severe flash flooding in several parts of Puerto Rico. Just under 4.5 inches of rain was measured in San Juan on Thursday.
Numerous fallen trees, landslides and flooding have been reported in southwest Puerto Rico, according to local emergency management. Flooding of the river was recorded by USGS gauges at several locations in Puerto Rico.
(NEWS: Murderous Isaias caused extensive damage in the Dominican Republic, Puerto Rico)
Heavy rains and high winds move away from New Providence Island, including the capital of the Bahamas, Nassau. A 50 mph gust of wind was timed at Nassau International Airport, and power was cut in parts of the island as a precaution.
(RECENT NEWS: Impacts of Isaias in the Bahamas)
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