Weather warnings



Weather Warning

Accelerated trade winds and displacement of Easterly Wave n.°19

July 13, 2024
10.30 a.m.

Diagnosis: During the first hours of this Saturday, a low concentration of Saharan dust was present over the national territory, and to a greater extent towards the center and north of Central...

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Meteorological Warning

Accelerated trade winds and rains in the country this Friday

July 12, 2024
10:20 am

Diagnosis: Unstable atmospheric conditions persist in southern Central America, due to the position of the Intertropical Convergence Zone and the drag of humidity from the Caribbean by the trade...

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Aviso Meteorológico (Actualización)

Onda tropical #18 saliendo de Costa Rica

11 de julio de 2024
3:00 p.m.

Diagnóstico: La onda tropical #18 ha dejado abundantes e intensas precipitaciones en las últimas horas en el país, pero principalmente en la Zona Norte registrándose acumulados entre 100 mm y los...

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Weather Warning

Tropical wave #18

July 11, 2024
9.45 am

Diagnosis: is over Costa Rica this Thursday, causing unstable conditions in the maritime sector off the coast of Limón, which is causing rain and showers with thunderstorms...

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Aviso Meteorológico

Lluvias y tormenta eléctrica durante la tarde y noche y onda tropical #18 para este jueves

10 de julio de 2024
10.15 a.m.

Discussion: The Intertropical Convergence Zone remains close to the region, which contributes significant moisture content to the environment. This favors cloudiness in the surroundings of the...

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Aviso Meteorológico-IMN-240923-11:00a.m.



Weather Warning

Tropical wave #40 will favor atmospheric instability for this Monday

September 24, 2023
11.00 a.m.

Weather Warning
Tropical wave #40 will favor atmospheric instability for this Monday
September 24, 2023
11:00 a.m.

Diagnosis: Costa Rica shows a stable atmospheric pattern and variable cloudiness. For the Central Pacific and South Pacific, cloudy skies are observed, the rest of the country shows partially cloudy conditions. Currently tropical wave #40 is located approximately 78°W (border between Panama and Colombia), this system shows a high humidity content and atmospheric instability.

Forecast: Throughout the afternoon, partly cloudy skies are expected for the Caribbean, North Zone and North Pacific. During the afternoon, possible isolated rains are expected in mountainous sectors with estimated amounts between 10 - 25 mm and possible localized maximums.

For the Central and South Pacific, scattered rains with localized downpours are expected, especially in mountainous sectors and near the border with Panama. These precipitations could continue until early evening. Estimated quantities in 6 hours will range between 10 - 35 mm with maximum possible quantities between 40 - 80 mm.

During the afternoon, the Central Valley presents a probability of isolated short-duration showers to the west of the region. Estimated rainfall in 6-hour periods will be between 10 – 30 mm with possible maximums in mountainous sectors.

Tropical wave #40 will strengthen the humidity content and atmospheric instability for the afternoon of Monday, September 25. The Intertropical Convergence Zone is expected to strengthen on Tuesday due to the instability pattern generated by tropical wave #40.

Warning: Caution is recommended on unstable slopes, sectors with high vulnerability to landslides due to rainfall of varying intensity in the South Pacific due to the high saturation of soils in mountainous sectors.
Therefore, the IMN recommends:
• Caution due to wastewater saturation in places prone to this type of flooding.
• Prevention against thunderstorms and seeking shelter in a safe place in case strong gusts of wind occur or are perceived near storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach between 80 and 100 kilometers per hour in some isolated cases.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page:

Paulo Solano