Costa Rica Monitors Caribbean Tropical Wave with 70% Storm Chance

Costa Rica Monitors Caribbean Tropical Wave

Costa Rica's Instituto Meteorológico Nacional (IMN) is tracking a tropical wave in the Caribbean with a 70% chance of becoming Tropical Storm Melissa, potentially bringing heavy rains and floods.

Those living along the Caribbean coast are aware of how quickly the weather can change in October. The tropical wave, labeled Onda Tropical #40, is currently located about 1,000 kilometers east of Costa Rica's shores, moving west at a slow pace of 15 to 20 kilometers per hour.

The wave is already bringing showers and gusty winds to the Leeward Islands. Forecasters at the IMN and the U.S. National Hurricane Center agree that conditions are favorable for the wave's growth, with warm waters and low wind shear.

Conditions look right for growth, with warm waters and low wind shear in play.

The IMN and the U.S. National Hurricane Center are monitoring the situation, and if the wave develops into a tropical storm, it will be named Melissa.

Author's summary: Costa Rica monitors a tropical wave with a 70% chance of becoming a storm.

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The Tico Times The Tico Times — 2025-10-20