The island continues to be covered with a light layer of dust particles from the Sahara desert that will limit the formation of showers this weekend, said the meteorologist José Álamo, of the National Meteorological Service in San Juan, on Saturday.
It will not be until Monday that the rainiest days begin, he warned.
For today, Saturday, what stands out is the slight amount of dust from the Sahara in the environment.
"The mist is not affecting visibility" , indicated the expert.
It is expected that in the afternoon some showers will be registered for the south of the island, due to the combination of local effects and the sea breeze.
Tomorrow, Sunday, the same is expected conditions, although the isolated showers that could be registered in the afternoon would be for the west, because a change in the wind direction is expected.
For both days, the maximum temperature is expected to be around 90 degrees Fahrenheit.  What else s e highlighted in the weather conditions are two systems in the Atlantic Ocean that are monitored by the National Hurricane Center (NHC, in English) for their possible cyclonic development.
The first system would pass to the south of the Island as a wave tropical between Monday and Tuesday
– NWS San Juan (@NWSSanJuan) August 29, 2020
Álamo reported that this system has “a field humidity fairly wide. ”
“ It will bring an increase in rain activity and a slight increase in winds, ”he said.
According to the NHC, this system has 20% potential for cyclonic development in the next 48 hours and 30% in the next five days
Álamo indicated that the rest of the week would continue to be humid. But, he detailed that the most significant downpours would be registered at the end of next week. He explained that there will be a low pressure at high levels, which would cause the formation of thunderstorms.
Regarding the other system that the NHC monitors, the meteorologist explained that “there is too much uncertainty about how it will evolve and if even if it will to bring the area closer. ”
The problem is that the tropical wave moves so slowly that there is no accurate forecast.
The NHC indicates that it may reach some cyclonic development next week, when it is to the east or center of the Atlantic Ocean.
“It is difficult to determine when it will approach and if it will have an impact. It is moving slowly, "said Álamo.
On the other hand, maritime conditions are calm. Waves between three to five feet are recorded.
For tomorrow, Sunday, the waves are expected to rise to six feet. Small boat operators are urged to exercise caution.