What Marine Hazards are Florida’s boaters and beachgoers at risk of?
Dangerous rip currents, waves, lightning, and waterspouts are among the marine hazards facing Florida’s boaters and beachgoers.
Ocean waves are generated from various sources. The most common are those created by the wind. These waves can occur over oceans, seas, lakes, and intracoastal waterways. Waves are constantly changing and can grow quickly. Rough seas build rapidly as winds approach gale force (34 knots or 39 mph). Under these conditions, seas are likely to build to 12 feet or more. When seas build to five or six feet, small craft operation is cumbersome and could become deadly.
Surf and Rip Currents
As ocean waves approach the coast, they move from deep to shallow water. The wave heights begin to increase due to friction along the ocean floor. Breaking waves induce small ocean currents near the coastline that can lead to rip current development. A rip current is a powerful channel of water flowing quickly away from shore, which occurs most often at low spots or breaks in the sandbar and in the vicinity of structures such as jetties and piers. Additionally, long periods with elevated winds parallel to the coast can lead to strong along shore currents, which spawn rip currents as well. This is common in the winter months along the Florida Panhandle beaches in the wake of strong cold fronts do to moderate westerly winds.
Thunderstorm Winds and Lightning
Thunderstorms are violent, short-lived weather disturbances that can include lightning, heavy rain or hail, and strong, gusty winds. The strong gusty winds in a thunderstorm can lead to rapidly building seas and very rough marine conditions. Thunderstorms with frequent cloud-to-ground lightning often affect the inland lakes and rivers during the early afternoon. Early morning lightning storms are more common along the coast. Lightning can strike the ground or water many miles away from the storm cloud. The vast majority of lightning injuries and death on boats occur on small boats with no cabin. It is crucial to listen to weather information when you are boating. If thunderstorms are forecast, do not go out. If you are out on the water and skies are darkening, get back to land and find a safe building or safe vehicle. If this is not possible, drop anchor and get as low as possible. Boats with cabins offer a safer environment for protection. If you are inside the cabin, stay away from metal and all electrical components.
A waterspout is a tornado over water. In Florida there are two spout types of waterspouts. The “type A” spout is a violent and potentially destructive vortex which moves quickly. These spouts often form in the spiral rainbands of approaching tropical cyclones and can also develop along or ahead of winter cold front squall lines. The second type of waterspout, the “type B” spout, is usually less violent, slower moving, and less destructive than the type A spout. This type of waterspout develops quickly beneath a rapidly building cloud line, most often during the Florida rainy season (May-October).
How can Marine Weather Information be obtained?
- NOAA All-Hazards Weather Radio. The U.S. Coast Guard re-broadcasts some marine weather warnings, advisories, and statements across the marine radio emergency channel.
- The Internet. Each National Weather Service forecast office serving Florida has a Website containing important local weather information.
- Smartphones have also become and increasingly popular way to obtain marine weather information.
Small Craft Advisory
Issued by the National Weather Service when seas build to seven feet or more and small craft operators should strongly consider remaining in port.
High Surf Advisory
Issued by the National Weather Service when surf reaches a height of 10 feet or greater along the Atlantic Beaches, or a height of 5 feet or greater along the Gulf Beaches.
A marine weather warning for gale force winds from a non tropical system.
A marine weather forecast for the waters between 60 and 250 miles off the coast.
Special Marine Warning
Issued for brief or sudden occurrence of sustained wind or frequent gusts of 34 knots or more. This is usually associated with severe thunderstorms or waterspouts.
How many people are killed each year?
On average 10 people drown each year as a result of rip currents. Surprisingly, rip currents kill more people in Florida during an average year than hurricanes, tornadoes and lightning combined. Many of these drowning incidents occur on days when the weather is quite pleasant. Tallahassee is at no risk for rip currents, but students traveling to Panhandle beaches are at risk.
How to Avoid Getting Caught in a Rip Current
- Check water conditions before going in by looking at the local beach forecast before you leave for the beach and talking to the lifeguard at the beach.
- Only swim at a beach with lifeguards. The chances of drowning at a beach with lifeguards are 1 in 18 million.
- Don’t assume!Great weather for the beach does not always mean it’s safe to swim or even play in the shallows. Rip currents often form on calm, sunny days.
- Learn how to spot a rip current
Check the National Weather Service Surf Zone Forecast
Before you leave for the beach, check the official surf zone forecasts and/or beach advisories and closings. If visiting, you can as your hotel or rental agency for local sources of weather and beach forecasts.
Know how to swim before you venture in.
Swimming in a pool is not the same as swimming at a surf beach with crashing waves, winds, and dangerous currents. Changing ocean currents and winds can quickly exhaust your energy and strength. You should be a strong swimmer before you go into the ocean or Gulf of Mexico. Many swimming programs now offer lessons in how to escape a rip current.
Know what the warnings flags mean.
Read the beach safety signs at the entrance to the beach. Once on the beach, look for beach warning flags, often posted on or near a lifeguard’s stand. A green flag means water conditions are safe and other colors mean conditions are not safe. These flags are there to protect you. Please read and obey the posted beach signs and warning flags.
- Swim at a lifeguard-protected beach.
- Be cautious at all times, especially when swimming at unguarded beaches.
- Obey all instructions from lifeguards.
- Consider using polarized sunglasses. They will help you spot signatures of rip currents by cutting down glare and reflected sunlight off the ocean’s surface.
- Pay especially close attention to children and persons who are elderly when at the beach. Even in shallow water, wave action can cause loss of footing.
If caught in a rip current.
- Remain calm to conserve energy and think clearly.
- Never fight against the current.
- Swim out of the current in a direction following the shoreline.When out of the current, swim at an angle-away from the current-towards the shore.
- If you are unable to swim out of the rip current, float or calmly tread water. When out of the current, swim towards shore.
- If you are still unable to reach shore, draw attention to yourself by waving your arm and yelling for help.
- File a float plan before getting underway- this could be as simple as letting someone know where you are going and when you expect to be back.
- Check observed and forecast weather conditions before beginning your trip.
- Have an escape plan in mind. Thunderstorms and weather related hazards form quickly. Never let storms cut off your route back to land.
- Watch for threatening dark clouds, a steady increase in seas or an increase in wind.
- Know the limitations of your craft- if gale warnings or small craft advisories are in effect, cancel or postpone your voyage.
- Wear a life jacket.
- If lightning is threatening, keep below decks if possible and keep away from metal objects that are not grounded.
- The Coast Guard advises boaters to remain alert and observe safety and security zones at all times.