Tropical Depression Peter Dissipates North of the Greater Antilles

Tropical Storm Peter has succumbed to strong wind shear, weakening to a depression on Tuesday, and has now become a remnant low-pressure system.

Tropical Storm Peter formed from the 47th tropical wave of the 2021 Atlantic Hurricane Season to move off the African Coast, then dubbed Invest 95L, and then Tropical Depression Sixteen.

The system brought heavy rain showers to the northern Leeward Islands, Virgin Islands, and Puerto Rico on September 21st, as it tracked to their east. Due to continued strong wind shear, its heaviest rains remained away from the islands over water.

The remnants of this system are located north of Puerto Rico and pose no threat to the Lesser Antilles.

The Latest From The National Hurricane Center

The remnants of Peter's Forecast Track as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)
The remnants of Peter’s Forecast Track as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)

At 11:00 PM Wednesday AST, the remnants of Peter were located near latitude 22.1 North, longitude 67.0 West. The remnants are moving toward the north-northwest near 7 KM/H. The remnants are expected to move generally northward over the next couple of days. Maximum sustained winds are near 45 KM/H with higher gusts. Gradual weakening is forecast over the next couple of days. The estimated minimum central pressure is 1008 millibars.

The remnants of Peter's latest information as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)
The remnants of Peter’s latest information as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)

Remants of Peter’s Watches & Warnings

The remnants of Peter's Watches and Warnings as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)
The remnants of Peter’s Watches and Warnings as of 11:00 PM Wednesday 22nd September 2021. (National Hurricane Center)

There are no coastal watches or warnings in effect at this time.

Rainfall associated with this system remains well north of the Greater Antilles. However, swells generated by Peter will affect the Virgin Islands, Puerto Rico, Hispaniola, and portions of the Bahamas during the next day or so. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office.

This system is of no direct threat to Trinidad and Tobago.

Remnants of Peter’s Forecast Discussion

Remnants of Peter (Weathernerds.org)
Remnants of Peter (Weathernerds.org)

Peter was on their last legs for the last 24-36 hours. Although a low-level swirl can still be seen in infrared satellite
imagery, this feature has continued to lose its definition.

Satellite-derived wind data shows that the circulation has become more elongated, and Peter lacks a well-defined center.

Peter has also lacked organized deep convection, with any activity along the axis of a trough northeast of the center of circulation.

Because of these characteristics, the National Hurricane Center has issued its final advisory on the system.

The remnants of Peter are expected to remain within an area of strong upper-level westerly winds, and further weakening should occur over the next day or two.

Peter’s remnants are forecast to move northward through the end of the week as it moves along a weakness in the low-level ridge.

Tropical Cyclone Climatology

2021 has already produced 17 tropical storms in the Atlantic Basin, with the next system being named Sam for the 2021 Atlantic Hurricane Season.

As we head through the second half of September and into October, we’ll continue to monitor the entire Atlantic closely as tropical cyclones could form from tropical waves, non-tropical low-pressure systems in the North Atlantic, and from the Central America Gyre in the Western Caribbean Sea or the southwestern Gulf of Mexico.

Facebook Comments