Weather Warning

Heavy rains and a thunderstorm this afternoon and early evening

May 03, 2025

10.25 a.m.

Discussion: The Intertropical Convergence Zone continues over the country, generating a high degree of instability and humidity. This, combined with the warm temperatures recorded this morning, are determining factors for the development of cloudiness, which will enhance rain, downpours, and thunderstorms.

Forecast: Rainfall of varying intensity is expected during the afternoon and early evening, as well as occasional heavy downpours with thunderstorms. This rain and thunderstorm activity is anticipated in the following regions: Central Pacific, South Pacific, Nicoya Peninsula, Central Valley, and North Zone, with expected accumulated rainfall of 40-100 mm over 6-hour periods, with possible higher amounts in localized areas. In the Caribbean, rainfall will be limited to mountainous areas and surrounding areas, with amounts ranging from 10 mm to 60 mm over 6-hour periods.

Warning: Rainfall in recent days has caused soil saturation to high levels, between 85% and 95%, in the South and Central Pacific; while in the Central Valley, Sarapiquí Basin, and Nicoya Peninsula, it is expected to reach around 50% and 75%. This situation increases the risk of flash floods and/or landslides.

Due to the above, the IMN recommends:
Be cautious about sewer saturation in areas prone to this type of flooding.
Prepare for thunderstorms and seek shelter in a safe place if strong wind gusts occur or are perceived 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

Rebeca Morera R.
Meteorologist
DMSA-IMN