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Nor’easter winds down, Weather Authority Alert comes to an end

Beach erosion and flooding reported

Some flooding has been reported in areas of St. Johns County, which will also subside as river and ocean levels recede.

JACKSONVILLE, Fla. – Coastal flood warnings, heavy surf, gale and inland wind warnings were posted along all of the Florida and Georgia coastal areas, including all inland tidal areas. The highest of King tides reached their peak and now will slowly subside.

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One of the main impacts was the ever-increasing high tides. These were forecast to be this year’s king tides -- the highest high tides of the year. The reasoning is that during certain astronomical configurations of the Earth, Moon and Sun can add to tidal ranges. King high tides run about 6″-12″ higher than normal astronomical tides. Interestingly, low tides also run below their normal range, by about 6″-12.″ The result is for a far greater range from low to high tides.

Relaxing onshore wind will also allow for outgoing tides to “flush” back into the Atlantic Ocean. If you live along any inland tidal river, or creek, do expect decreasing threats of backyard flooding.

Atlantic Ocean high tides were higher than normal and reached the sand dunes with each high tide (there are two each day).

So far, we have seen moderate high tide flooding at Mayport and through areas of St. Johns County.

This will be true for many tidal locations (St. Johns, St. Marys, Trout rivers and intracoastal)

Advisories included:

Advisories/Watches/WarningsMaximum impactsWorst timeLength of impact
Coastal Flood WarningWater levels up to 2′ above normal high tideSaturday & Sunday MorningThursday through Sunday (4 days)
High Rip Current RiskExpect large ripsNow through MondayThursday through Monday (5 days)
Heavy Surf AdvisoriesSurf running up to 7′Saturday MorningThursday through Sunday (4 days)
Gale WarningCoastal (offshore) winds to 50 mphSaturday MorningFriday and Saturday
Inland Flood (rain) WatchRainfall amounts could exceed 3″Friday night to Saturday morningFriday night through Saturday afternoon
Inland Flood (rain) WarningExcessive localized downpoursFriday night to Saturday morningFriday night through Saturday afternoon
*Note, no severe weather is expected
*Could be others, stay alert

Notice: The impacts were strongest along area coastal locations, including all coastal counties in Georgia and Florida.

Here are the expectations for the upcoming nor’easter.

Inland areas just disruptive with rains
Rains will be an issue but flooding potential is greater
Winds will shift offshore Saturday afternoon cleaning up the waves nicely!

Yes, gusts could be that high along the beaches.

Yes, gusts could be that high along the beaches
GFS Rainfall Estimates Through Saturday (Copyright 2021 by WJXT News4Jax - All rights reserved.)

About the Author:

Our chief meteorologist lives and breathes the weather on the First Coast.