Weather Warning

Intertropical Convergence Zone over the country

June 5th, 2025

9:40 a.m.

Diagnosis: The Intertropical Convergence Zone is positioned over the country. This system, combined with high humidity, creates a favorable environment for rain and showers with thunderstorms during the afternoon and part of the night.

Forecast: Rain and showers with thunderstorms are expected again during the afternoon; these conditions may extend into the night.

According to the most recent analysis, the estimated rainfall amounts for periods of 6 to 12 hours are as follows:

• North, Central, and South Pacific: between 20 mm and 40 mm, with maximums of up to 70 mm.
• Central Valley: between 10 mm and 30 mm, with localized maximums of up to 50 mm.
• Northern Zone: between 20 mm and 50 mm, with maximums of up to 70 mm.
• North and South Caribbean: between 20 mm and 50 mm, with localized maximums of up to 80 mm.

Warning: Currently, soil saturation rates between 85% and 95% are recorded around the Osa canton, the mountains of the South Pacific, Central Pacific, and the Nicoya Peninsula, as well as the mountains of the Northern Zone and the surrounding area of ​​Sarapiquí. These regions are vulnerable to flooding and landslides.

Because of the above, the IMN recommends:

• Take precautions due to sewer saturation in areas prone to this type of flooding.
• Prevent from thunderstorms and seek shelter in a safe place if strong wind gusts occur or are felt near storm clouds, due to the possible fall of tree branches, power lines, among other things. These gusts can reach 80 km/h in some isolated cases.
• Stay informed through social media: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR, and the website: www.imn.ac.cr

Paulo J. Solano S.
Meteorologist
DMSA-IMN