Weather Warning (Update)

Tropical Wave 7 Exits Costa Rica

June 22, 2025

06.40 p.m.

Discussion: The tropical wave is gradually exiting Costa Rica and entering the Pacific Ocean. The instability it leaves in its wake is maintaining cloudy conditions across most of the country at this time, as well as rains of varying intensity in the Northern Zone, the Central Valley, the North Pacific, and mountainous parts of the Caribbean, Central, and South Pacific. Overall, rainfall amounts in the last 6 hours have ranged between 20 mm and 50 mm, with the highest accumulated rainfall recorded in Talamanca with 117 mm, followed by La Fortuna with 88 mm, and Coronado with 60 mm.

Forecast: Rains of varying intensity will continue overnight in the Northern Zone, the Caribbean mountains, and the Pacific regions, while moderate rains and fog are expected in the Central Valley. Rain is possible early Monday morning, especially in coastal areas of both the Pacific and Caribbean coasts and the plains of the Northern Zone. The estimated amounts for the 6- to 12-hour period are as follows:

• North, Central, and South Pacific: between 30 mm and 60 mm, with highs of up to 80 mm.
• Central Valley: between 15 mm and 25 mm, with localized highs of up to 50 mm.
• North Zone: between 30 mm and 60 mm, with highs of up to 90 mm.
• North and South Caribbean: between 25 mm and 60 mm, with localized highs of up to 80 mm.

The Intertropical Convergence Zone—composed of low-pressure systems—will remain very active and close to Costa Rica. This will mean a considerable contribution of moisture and instability, facilitating cloud formation and the presence of rain at the beginning of this week in different regions of the country.

Warning: Special attention should be paid to the Nicoya Peninsula, the Northern Zone, and the South Pacific, as these areas have very high soil saturation levels between 85-95%, increasing the risk of incidents.

Because of the above, the IMN recommends:

• Caution against possible sewer saturation in areas prone to flooding due to water accumulation.
• Prevention in the event of a thunderstorm: If strong wind gusts occur or are perceived near storm clouds, it is recommended to seek shelter in a safe place, as tree branches, power lines, or other objects could fall. These gusts can reach up to 80 km/h in isolated cases.
• Stay informed through official channels: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR, website: www.imn.ac.cr

Rebeca Morera R.
Meteorologist/DMSA-IMN

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