Weather warnings
May
09
Aviso Meteorológico
Heavy downpours with thunderstorms this afternoon on the Pacific side
May 9, 2025
10:00 am
Diagnostic: The Intertropical Convergence Zone remains positioned near our country. Additionally, local factors such as high temperatures and the entry of sea breezes contribute to favorable...
May
08
Meteorological Warning Update
(Update) Showers and thunderstorms during the afternoon and early morningmeras horas de la noche
May 8, 2025
6:00 pm
Forecast: Rainy conditions have been observed this afternoon on the Pacific coast, much of the Central Valley, and mountainous areas of the Caribbean and the Northern Zone, due to the activity of...
May
08
Weather Warning
Showers and thunderstorms during the afternoon and early evening
May 08, 2025
10.30 a.m.
Discussion: The Intertropical Convergence Zone remains located over Costa Rica, generating significant moisture and instability. This, along with morning warming and the arrival of sea breezes,...
May
07
Aviso Meteorológico Actualización
(Actualización) Lluvias y aguaceros fuertes en el Valle Central y la vertiente del Pacífico
7 de mayo de 2025
6:20 pm
Diagnóstico: La Zona de Convergencia Intertropical sobre el país, en conjunto con factores locales como el calentamiento diurno y el ingreso de humedad desde el Océano Pacífico, favorecerá...
May
07
Weather Warning
Heavy rain and downpours in the Central Valley and the Pacific slope
May 7, 2025
09:35 a.m.
Diagnosis: The Intertropical Convergence Zone (ITCZ), combined with local factors such as daytime warming and the entry of moisture from the Pacific Ocean, will favor variable rainfall throughout...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-190820-330pm
Aug
19
Weather Warning
Tropical wave # 30 and its potential to become a tropical cyclone
August 19, 2020
3.30 p.m.
Diagnosis: Tropical wave # 30 is located in the center of the Caribbean Sea and moving between Haiti and Colombia, approximately 1138 km from Costa Rica. The National Hurricane Center (NHC) indicates that, at this time, the tropical wave has a probability of becoming a tropical depression of 60% (medium) in the next 48 hours and 80% (high) in the next 5 days.
Forecast: The latest analysis on tropical wave # 30 maintains the forecast of arrival in Costa Rica for Thursday afternoon, which would be interacting with the Intertropical Convergence Zone favoring a rainy scenario in the coming days.
If this tropical wave turns into a tropical depression, this would happen in northern Central America by the weekend. Due to its possible position and strengthening, there is a high probability of indirect influence towards the national territory, increasing the rainfall from that day and towards the weekend.
The IMN continues to strictly monitor the evolution of said disturbance and will promptly report any variation of the disturbance and its possible influence on the country.
Therefore, the IMN recommends:
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Juan Diego Naranjo Diaz
Meteorologist
DMSA-IMN
RSS IMN latest alerts(Local Notification): https://www.imn.ac.cr/en/web/imn/avisos-meteorologicos/-/asset_publisher/lTlyP4wEZlDa/rss 
RSS IMN latest alerts (Amazon Replication): https://cap-sources.s3.amazonaws.com/cr-imn-es/rss.xml 
Impact-based forecasting
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Ephemerides
In this section you will find all the necessary information about sunrises and sunsets of the Sun and Moon, as well as all the information about the corresponding lunar phases.
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