Weather warnings

Jul

08

Informative Weather Notice

Sahara dust over the country

July 08th, 2025
9:50 a.m.

Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...

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Jul

07

Weather Warning

Heavy downpours during the afternoon in the Pacific and northern regions

July 07th, 2025
10.40 a.m.

Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...

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Jul

06

Aviso Meteorológico

Efectos de la onda tropical #13 en el país este domingo y lunes

06 de julio de 2025
11.25 am

Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...

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Jul

01

Weather Warning

Rainy conditions in the Caribbean and Northern Zone this Tuesday and Tropical Wave #12

Jul 01th, 2025
10 am

Diagnosis The strengthening of the trade winds over the central and northern regions of the country has produced wind gusts of up to 50 km/h in areas such as Alajuela this morning. This...

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Jun

28

Weather Warning

Tropical Wave #10 over Costa Rica

June 28th, 2025
10:30 a.m.

Diagnosis: Tropical wave #10 is over the country this Saturday, causing instability in maritime areas of the Caribbean and northern parts of the Northern Zone. There has been increasing...

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Weather warnings history

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Aviso Meteorológico-IMN-230724-11:00 a.m.

Jul

23

Weather Warning

Intertropical Convergence Zone over Costa Rica

July 23, 2024
11:00 am

Diagnosis: Humid and unstable atmospheric conditions prevail this Tuesday, due to the Intertropical Convergence Zone is active over the national territory, which has left weak rains both in the Northern Zone and in the Caribbean plains.

Forecast: In the next 3 hours, variable intensity rains are expected near the coast of Limón, with estimated amounts between 20 mm and 40 mm.

In the afternoon, both in the Northern Zone and the Caribbean, rains will be concentrated in the mountainous sectors, with amounts between 30 mm and 60 mm. Part of these rains will reach the Central Valley through the mountains, with estimates between 15 mm and 30 mm.

On the Pacific slope, showers with thunderstorms are expected along the coast with estimated amounts between 50 mm and 70 mm with maximum amounts of 80 mm. The rains are expected to extend into the early evening.

Warning: Mountains of the Northern Zone and Northern Caribbean are prone to landslides due to high soil saturation and possible overflowing of rivers at the foot of the mountains.

Due to the above, the IMN recommends:

- Caution for sewer saturation in places prone to this type of flooding.
- Prevention before thunderstorms and seek shelter in a safe place in case of strong gusts of wind 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 WEB Page: www.imn.ac.cr
 
Juan Diego Naranjo Díaz
Meteorologist
DMSA-IMN