The Hazardous Seas Alert
In addition, long-period swells are affecting T&T’s northern and eastern coastlines through Monday, coinciding with peak winds.
The Trinidad and Tobago Meteorological Service has updated their Hazardous Seas Alert (Yellow Level) for our coastal waters beginning at 5:00 AM Saturday 2nd January 2021 through 8:00 AM Monday 4th January 2021.
Trinidad and Tobago is NOT under any tropical storm threat, watch or warning.
Based on the latest model guidance and analysis, swell periods may range from 10-18 seconds beginning Friday night through Sunday night. Swell periods between 8-14 seconds have been observed.
These swells may be capable of producing large, dangerous breaking waves in bays, beaches, and other nearshore areas. This means that wave heights in bays and beaches may reach up to 3.0 meters, depending on the bathymetry of the area.
Coinciding with this swell event would be strong low-level winds, beginning Friday night through Monday morning, but peak winds are forecast Saturday night into Sunday morning. These winds will agitate seas, with waves averaging 2.5 meters, at times up to 3.5 meters in open waters. Waves up to 3.5 meters have been observed in our open waters.
In sheltered areas, areas are forecast to be near 1 meter and choppy over the weekend.
Information from the Trinidad and Tobago Meteorological Service concerning the Hazardous Seas Alert in effect from 5:00 AM Saturday through 8:00 AM Monday.
“There have been confirmed reports of agitated sea conditions with wave heights averaging 2.5 m occasionally peaking up to 3.5m in open waters. Sea conditions in sheltered areas have also been occasionally choppy.” according to the Trinidad and Tobago Meteorological Service. This “alert” status takes into account the possibility of the event occurring. This event is observed.
The color of the alert indicates the severity of the event and the probability of the event occurring. Currently, the alert level is at Yellow. This means that the hazard is observed and you need to be aware of the impacts of hazardous seas in your area. Moderate impacts are expected, so there is the chance of possible injuries and persons would need to take action to ensure safety. There may be minor damage to property.
Impacts on T&T’s Shorelines
Impacts possible from large, battering waves include the following:
- Loss of life;
- Sea search and rescue disruptions;
- Disruptions to sea transportation;
- Scarcity of seafood;
- Damage or loss of boats and fishing equipment;
- Disruptions to marine recreation and businesses
- Economic losses.
Other impacts from the high winds, apart from hazardous seas, include:
- Coastal erosion;
- Localized disruptions of businesses;
- Disruption to outdoor and sporting activities;
- Disruption of transportation (air and especially sea) and
There is also the potential for loss of life. There is a high risk of rip currents, strong currents that can carry even the strongest swimmers out to sea.
Rip currents are powerful channels of water flowing quickly away from the shore, which occur most often at low spots or breaks in the sandbar and near structures such as groins, jetties, and piers. If caught in a rip current, relax and float. Don’t swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
There is also the potential for injuries to beachgoers; beach closures; localized disruptions to marine recreation and businesses and financial losses.
High tides combined with onshore wind and swell actions could result in localized coastal flooding and beach erosion.
High surfs can knock spectators off exposed rocks and jetties. Breaking waves may occasionally impact harbors making navigating the harbor channel dangerous.
Saltwater will likely splash onto low-lying coastal roads.
Coral reefs may experience increased stress and damages, in addition to localized beach erosion, particularly in areas where battering waves focus.