Weather warnings

Jul

15

Informative Weather Advisory

Saharan Dust and Strong Wind Gusts Affecting Several Regions

July 15, 2025
9:00 am

  A dry air mass accompanied by Saharan dust is positioned over the Caribbean Sea and Central America. Additionally, a marked atmospheric pressure gradient is accelerating the trade winds...

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Jul

14

Aviso Meteorológico

Onda tropical #15 transitando este lunes por el país

14 de julio de 2025
10:00 AM

Diagnóstico: La onda tropical #15 ingresó al país durante la madrugada. Aunque es una onda débil, ha generado lluvias y tormentas en zonas marítimas del Pacífico Central, el Caribe y en áreas...

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Jul

13

Aviso Meteorológico Informativo

Tropical Wave #15 transiting over Costa Rica early Monday morning

July 13h, 2025
6 p.m.

Diagnosis: During the course of early Monday morning, tropical wave #15 will be passing over the national territory. Although it is a weak tropical wave, it will be interacting with the...

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Jul

11

Weather Warning

Tropical wave #14 over Costa Rica this Friday

July 11th, 2025
9:50 a.m.

Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...

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Jul

10

Weather Warning

Tropical Wave 14 to Pass Over Costa Rica This Friday

July 10, 2025
04.30 p.m.

Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...

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Weather warnings history

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Aviso Meteorológico-IMN-120620-0635pm

Jun

12

Weather Warning

Tropical Wave # 5 will spread rains overnight

June 12, 2020
06.35 p.m.

Discussion: Tropical wave # 5 has entered the country, it is in the eastern sector of it. This phenomenon will be spreading the rains that have manifested themselves this afternoon in various parts of the country. During said afternoon period, heavy rains have occurred in the North Zone, Guanacaste, north of the Central Valley, mountainous sectors of the Caribbean and Central-South Pacific. The highest accumulations have been recorded in Sarapiquí with maximums of 85 mm, 44 mm in Liberia, Laguna Fraijanes 84 mm, Cerro Burío 43 mm, among others.

Forecast: In the hours of the night the rains of variable intensity will continue and showers with thunderstorms in the North Zone, North Pacific and Central Valley, amounts between 40-60 mm are estimated, larger accumulations are possible in a timely manner. For its part, in the Caribbean, Central and South Pacific, light to moderate rains are expected, with accumulations between 25-50 mm.

During Saturday morning the effects of the tropical wave will continue; therefore, variable partial to total cloud cover is expected with possible rainfall in mainly Pacific coastal areas.

Warning: Special attention on the coast of the Gulf of Papagayo, Tempisque Valley, Sarapiquí and surroundings, Osa Peninsula.

Due to the above, the IMN recommends:

  • Caution in areas vulnerable to flooding due to sewer saturation.
  • Take refuge in a safe place in case of listening to a thunderstorm or perceiving strong gusts of wind near storm clouds, as well as caution for possible falling tree branches, power lines, among others.
  • Attention on the main national highways, such as route 27 and route 32.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB page: www.imn.ac.cr

Rebeca Morera R
Meteorologist
DMSA-IMN