Saharan dust causes Tropical Storm Gonzalo to weaken
The bothersome Saharan dust plume has
proved to be a nuisance for both humans and storms as Gonzalo has slightly
weakened on its approach to the Caribbean.
According to the Met Office of Trinidad and
Tobago, the Sahara dust around Tropical Storm Gonzalo is responsible for the
stunted development and intensification anticipated on Thursday afternoon (July
23).
By this time, Gonzalo was already forecast
to have strengthened into a category one hurricane, however, the system now has
maximum sustained winds of 95 kilometres/hour.
As at 2:00 pm Eastern Standard Time (EST),
Tropical Storm Gonzalo was located at latitude 9.7 North and longitude 48.8
West—or 1,370 kilometres east of the southern Windward Islands.
The hurricane watch advisory for Barbados
and St Vincent and the Grenadines remains in effect as the National Hurricane
Center (NHC) indicated that Gonzalo continues to churn westerly at 22
kilometres/hour.
Interestingly, the Saharan dust may have an
additional effect on Tropical Storm Gonzalo as the Florida-based NHC noted that
the system is much smaller in size than anticipated; with storm-force winds
only extending 35 kilometres from its centre.
The NHC warned that there is still a chance
Gonzalo could develop into the first hurricane of the 2020 Atlantic season.
“Satellite-derived wind data indicate that
maximum sustained winds have decreased to near 60 mph (95 km/h) with higher
gusts. Some re-strengthening is possible
during the next couple of days, and there is still a chance that Gonzalo could
become a hurricane,” the NHC advisory remarked.
“The satellite wind data indicate that
Gonzalo is an even smaller storm than previously thought, and tropical-storm-force
winds only extend outward up to 25 miles (35 km) from the centre,” it
continued.