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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Rainy activity for this afternoon

Apr

23

Meteorological warning

Rainy activity for this afternoon

april 23, 2020.
11:10 am

Diagnosis: The weakening of the trade wind has allowed the entry of moisture from the Pacific Ocean to national territory throughout this morning, this, together with the high temperatures registered on the Pacific side, generates favorable conditions for rainy activity this afternoon.

 

Forecast: For this afternoon and early evening, isolated showers are expected for the Central and South Pacific regions, mainly in the border area with Panama, the Osa Peninsula and mountainous areas. For the Central Valley scattered rains are expected mainly in the vicinity of the upper parts, in addition it is possible to have an occasional thunderstorm in the north and west.

On the other hand, significant rainfall is not expected in the Caribbean and Northern Zone during this period.

Due to the above, the IMN recommends:

  •     Caution in areas vulnerable to flooding due to sewerage saturation, especially in the South Pacific and Central Pacific regions.
  •     Take refuge in a safe place in case of hearing an electrical storm or perceiving strong gusts of wind near the storm clouds, as well as precaution for possible fall of tree branches, power lines, among others.
  •     Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr