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Aviso Meteorológico-IMN-160920-Lluvias y tormenta en el Pacífico - actualización



Weather Warning Update

Rains and storms in the Pacific

September 16, 2020
6:00 p.m.

Diagnosis: This Wednesday, the Convergence Zone is located over Costa Rica, coupled with local factors such as warm temperatures recorded and little cloudiness from the morning will produce rainfall in the country.

At the moment, there have been large accumulations on the Pacific slope with amounts between 20mm in sectors such as Las Spheres de Osa, 35mm in Fundación Neotrópica in Sierpe de Osa up to 105 mm in Pindeco, said sectors previously mentioned in the South Pacific and for the Central Pacific and North amounts between 33mm in Palo Verde and 10mm in Arunachala de Rio Nuevo in Perez Zeledón respectively

Forecast: Although the rains in terms of their intensity have had a downward behavior according to the monitoring given, in the remainder of the verpertino period and early hours of the night it is expected that the downpours will continue with an electrical storm located in the Pacific slope with estimated amounts between 10-70mm, in addition to that for the Central Valley, weak to moderate rains are forecast with amounts between 5-35mm with possible higher amounts of a specific nature.

For the sectors of the North Zone and mountains of the Caribbean, it is projected that weak rains may occur, reaching amounts of 5-15mm

For hours in the middle of the night period, it is anticipated that the rains will continue in the Pacific, and the Central Valley, intermittently and of variable intensity that will cease during the period, estimating amounts between 5-25mm.

Warning: High levels of soil saturation prevail in the North Zone, northwest of the Central Valley, the Nicoya Peninsula and the South Pacific; therefore, particular attention is recommended.

Due to the above, the IMN recommends:


  •     Caution in areas vulnerable to flooding due to sewer saturation.
  •     Take shelter in a safe place in case of hearing an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling tree branches, power lines, among others.
  •     Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page:

Daniel Chacon Fernandez