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-300120-

Jan

30

Aviso Meteorológico

Rainy conditions this afternoon in the country

January 30, 2020
10.45 a.m.

Diagnosis: This morning the warm and quite humid behavior prevailed in various parts of the national territory, mainly due to the low cloud cover and the breeze contribution from the maritime sector. The maximum temperatures ranged between 25 and 33°C, while the relative humidity values ??easily exceeded 60%.

Forecast: For this afternoon, the presence of isolated rains and showers with thunderstorms is expected in the Nicoya Peninsula and in the Central and South Pacific, with accumulated between 20-40 mm, and possible higher amounts in a localized way. In the Central Valley and mountains of the Caribbean and North Zone, rain and isolated showers are anticipated with accumulated between 10-20 mm and possible localized maximums of up to 30 mm.

With regard to the night period, the chances of rain substantially.

Due to the above, the IMN recommends:

  • Caution in areas vulnerable to flooding due to sewer saturation, increased flow in rivers and streams, and in areas prone to landslides.
  • Shelter in a safe place in case of hearing thunderstorms or perceiving strong gusts of wind near storm clouds, as well as precaution for possible fall of tree branches, power lines among others.
  • Caution to drivers due to reduced visibility and wet roads.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute and the Website: www.imn.ac.cr


Eladio Solano León
Meteorologist
DMSA-IMN