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Tropical Storm Isaías near hurricane strength; about 100 miles east-southeast of St. Augustine

Tropical Storm Warnings are in effect for coastal locations across the First Coast. A Hurricane Watch has been issued for portions of the Carolinas.

JACKSONVILLE, Fla. — Tropical Storm Isaías has strengthened slightly while moving north-north westward just offshore the east-central Florida coast. It is still a tropical storm and, as of the 5 a.m. National Hurricane Center advisory, it is expected to remain near hurricane strength when it reaches the Carolinas. 

As of Monday morning, the storm was about 100 miles southeast of St. Augustine with 70 mph maximum sustained winds.

A Tropical Storm Warning is in effect for coastal Flagler, coastal St. Johns, coastal Duval, coastal Nassau, coastal Camden, and coastal Glynn counties.

Credit: First Coast News

For the First Coast, most of the impacts will be felt just after midnight and into the early Monday morning. Expect the onshore wind to continue and pick up, with winds of 30 mph and some isolated gusts to 60 mph along St. Johns & Flagler counties' coastlines. Surge of 1 - 3 feet holds for those vulnerable spots south of Duval and coastal southeastern Georgia. Stay locked in for any changes to our local impacts forecast, a county-by-county breakdown can be found here.

As far as timing goes, the main impacts for Flagler and St. Johns counties will be between 3 a.m. and 9 a.m. Monday. For Duval County, we'll see the gustiest weather move through between 5 a.m. and 11 a.m. Monday. For the southeastern Georgia coastline, think from between 8 a.m. and 2 p.m.

The next complete National Hurricane Center advisory will be at 5 a.m.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for...

  • EDISTO BEACH SOUTH CAROLINA TO CAPE FEAR NORTH CAROLINA

A Storm Surge Watch is in effect for...

  • CAPE FEAR TO DUCK NORTH CAROLINA
  • PAMLICO AND ALBEMARLE SOUNDS

A Hurricane Watch is in effect for...

  • SOUTH SANTEE RIVER SOUTH CAROLINA TO SURF CITY NORTH CAROLINA

A Tropical Storm Warning is in effect for...

  • SEBASTIAN INLET FLORIDA TO FENWICK ISLAND DELAWARE
  • PAMLICO AND ALBEMARLE SOUNDS
  • CHESAPEAKE BAY SOUTHWARD FROM SMITH POINT

A Tropical Storm Watch is in effect for...

  • FENWICK ISLAND DELAWARE NORTHWARD TO WATCH HILL RHODE ISLAND
  • CHESAPEAKE BAY NORTH OF SMITH POINT
  • TIDAL POTOMAC RIVER
  • DELAWARE BAY
  • LONG ISLAND AND LONG ISLAND SOUND

In addition to Isaías, Tropical Depression Ten developed off the coast of Africa and has already dissipated. There is also another tropical disturbance behind Isaias, but it's expected to travel in the storm's wake and re-curve out to sea. There will be updates as needed. Stay tuned!

RELATED: Know your hurricane evacuation zone

Isaias satellite radar:

How to download the First Coast News app

As always, stay prepared and tuned to updates throughout the entire Atlantic hurricane season. Remember: it only takes one.

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RELATED: Become a forecaster this hurricane season with the First Coast News app