Northeast winds gusting up to 45 mph are pushing through the St. Johns River basin. The National Weather Service warns minor tidal flooding is possible along the basin, which runs through the Orange Park and Fleming Island area, through early next week.

A gale warning, a high surf advisory and a wind advisory are all active across Northeast Florida as a nor'easter drives strong onshore winds into the region. The gale warning remains in effect until 1 AM EDT Tuesday, Oct. 20, according to NWS alerts posted for the Palm Valley Intracoastal Waterway. The high surf advisory runs until 2 AM EDT Tuesday. A separate wind advisory for coastal counties covers Duval, Flagler, Nassau and St. Johns counties until 2 AM EDT Monday, Oct. 19.

The flooding risk is tied to high tide cycles. Minor tidal flooding is possible along the coast, the Intracoastal Waterway and the St. Johns River basin, News4Jax meteorologist Michelle McCormick reported Saturday, Oct. 17. The flooding potential is highest along the Duval, St. Johns and Flagler coastlines and the St. Johns River basin during times of high tide, according to an earlier News4Jax forecast. Additional beach erosion is expected because of weakened conditions from a previous northerly wind event.

As of Sunday, Oct. 18, conditions at Palm Valley on the Intracoastal Waterway showed northeast winds at 20 mph gusting to 32 mph, with four active weather alerts in place. The NWS expects northeast winds of 20 to 30 mph with gusts up to 40 to 45 mph in coastal counties.

Inland, the wind still poses hazards. Tree limbs could blow down, and a few power outages may result, according to the NWS wind advisory. The agency urged residents to secure outdoor objects such as patio furniture, sports equipment and trash cans before stronger gusts develop. Drivers of high-profile vehicles should use extra caution.

On the water, conditions are worse. The gale warning covers all Northeast Florida coastal waters from Fernandina Beach to Flagler Beach, extending 60 nautical miles offshore. The NWS reports northeast winds of 25 to 35 knots and seas of 9 to 14 feet. Strong winds could capsize or damage vessels, and the agency urged mariners to remain in port or seek safe harbor.

Breaking waves of 7 to 11 feet and dangerous rip currents prompted the high surf advisory and a high rip current risk through late Monday night. The NWS said inexperienced swimmers should stay out of the water.

Temperatures are expected to stay below average through Monday night. Morning lows along the St. Johns River basin will likely settle in the upper 50s to near 60 degrees, according to Action News Jax. Coastal and marine hazards could continue into midweek.

Residents can monitor active alerts at weather.gov/jax.