On Friday, the U.S. National Oceanic and Atmospheric Administration and the U.S. National Hurricane Center issued advisories regarding a developing weather system off the Pacific coast of Central America.

"A trough of low pressure offshore of Central America is producing disorganized shower and thunderstorm activity," the National Hurricane Center said in a statement. "Environmental conditions appear conducive for gradual development of this system, and a tropical depression could form later this weekend or early next week if the system remains offshore."

The U.S. center said the system is expected to move slowly northward toward the Central American coast. "Regardless of development, locally heavy rainfall is possible across portions of Nicaragua, El Salvador and Guatemala," forecasters added.

U.S. weather experts increased the probability of the system developing into a tropical depression to 60% over the next seven days.

As of Friday, the weather system was located along the Pacific coast from northern Costa Rica to Guatemala and was forecast to continue moving northwest toward Mexico during the next seven days, according to the U.S. National Hurricane Center.

Although the storm is not expected to make direct landfall in Costa Rica, the National Meteorological Institute (IMN) warned that it could still indirectly affect the country by bringing increased rainfall.

Costa Rican meteorologists expect stormy conditions to affect the country's Pacific Coast from Friday through Monday as the system moves towards Mexico's Pacific coastline.

Residual moisture associated with the system could continue generating showers through Tuesday, with weather conditions expected to gradually improve by Wednesday.

The IMN also warned that the Intertropical Convergence Zone, a low-pressure belt near the equator that helps fuel storm activity, is expected to enhance rainfall as it shifts across Costa Rica from the Pacific Ocean toward the Caribbean Sea.

The IMN forecast the following rainfall totals across the country:

• Central Mountain Range: 50 to 80 millimeters, with the heaviest rainfall expected at higher elevations.

• Pacific Coast, including Guanacaste Province and Puntarenas Province: 30 to 50 millimeters.

• Central Valley, including San José, Alajuela, Heredia and Cartago: 30 to 50 millimeters.

• Caribbean Coast, including Limón: 30 to 60 millimeters, with thunderstorms likely.