Weather warnings
May
13
Weather Warning (UPDATE)
Tropical Wave #1 crossing Costa Rica this Tuesday
13 de mayo de 2025
05.30 p.m.
Discussion: Tropical Wave 1 entered the country early this morning and, in conjunction with the Intertropical Convergence Zone, has generated very unstable atmospheric conditions across the...
May
13
Aviso Meteorológico
Onda Tropical #1 atravesando el país este martes desde la madrugada
13 de mayo de 2025
9.45 am
Diagnóstico: La onda tropical # 1 ingresó al país esta madrugada generando precipitaciones con tormenta eléctrica recurrente en el Caribe, Zona Norte y Valle Central, los acumulados más elevados...
May
12
Weather Warning
Variable rains during the afternoon on Monday and the passage of the tropical wave this Tuesday
May 12, 2025
03:40 p.m.
Diagnosis: The increase in moisture content from both sides, combined with local factors such as Pacific breezes and high daytime temperatures, have favored the presence of heavy downpours with...
May
11
Weather Warning
Rain of varying intensity this Sunday
May 11, 2025
12:40 p.m.
Forecast: This Sunday, the Intertropical Convergence Zone (ITCZ) is approaching the country, and moisture content is gradually increasing in the region. This system, combined with daytime warming...
May
10
Weather Warning
Rainy activity this Saturday
May 10, 2025
9:05 a.m.
Diagnosis: This Saturday, the Intertropical Convergence Zone remains over the national territory. In addition, high atmospheric pressure levels are increasing the intensity of the trade winds...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Informativo-IMN-311020- 1130am
Oct
31
Informative Meteorological Warning
High probability of a tropical cyclone in the next 48 hours
October 31, 2020
11.30 a.m.
Discussion: The atmospheric disturbance (tropical wave # 50) remains over the Caribbean Sea between Hispaniola Island and Lake Maracaibo, it is moving west towards Central America. This system has a high potential for development in a 90% tropical cyclone in the next 48 hours.
Forecast: The latest analyzes indicate its possible trajectory through the center of the Caribbean Sea, in addition to the interaction with other atmospheric systems, its position and strengthening, there is a high probability of indirect influence on Costa Rica, favoring a rainy scenario as of this Sunday 1 November and beginning of next week, especially in the Central and South Pacific.
The IMN will keep a strict follow-up of the evolution of said disturbance and will inform in a timely manner of any variation of the same 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
Rebeca Morera R
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
Provides information on the potential impacts to occur, in case of severe hydrometeorological events
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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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