Weather warnings



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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Weather Warning

Rains this afternoon due to the Intertropical Convergence Zone

July 9, 2024
11:10 a.m.

Diagnosis: The Intertropical Convergence Zone over our country and local factors will be favoring the presence of afternoon rains for the afternoon of this Tuesday. In the morning hours,...

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Aviso Meteorológico-IMN-170624-06:20pm



Weather Warning (Update)

Isolated showers and thunderstorms in the Northern Zone and North Pacific

June 17, 2024
6:20 p.m.

Diagnosis: During the afternoon of this Monday there has been a thunderstorm in sectors of the North Zone and North Pacific, especially near the mountains. The maximum accumulations since 12:00 p.m. in these sectors range between 10 mm and 40 mm. This in sectors of Upala, Tenorio Volcano. On the other hand, in Guanacaste the accumulations in the last 6 hours remain below 10 mm.

Forecast: During this night, variable rains are expected with the possibility of thunderstorms in the North Zone and east and south of the North Pacific. The estimated accumulations in periods of 6 hours will remain in ranges of 15 mm and 45 mm, with possible higher localized amounts.

In the rest of the sectors of the country the probability of rain, showers and thunderstorms is very low. The projected amounts would occur in a localized manner and below 10 mm in periods of 6 hours.

There is a possibility of fog banks in the Central Valley and mountains of the Northern Zone, the Northern Caribbean and the Central Pacific during tonight and early morning.

Warning: The rains that may occur in urban areas can cause flash flooding and sewer saturation due to the high saturation of the soil. There is a possibility of landslides in saturated soils in the mountains of the Northern Zone.

Due to the above, the IMN recommends:

• Caution due to sewer saturation in places prone to this type of flooding.

• Prevention in the event of an electrical storm and seeking shelter in a safe place in the event of strong gusts of wind occurring or perceived near the storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach 80 km/h in some isolated cases.

• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB page:

Paulo Solano