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-301224-04.00 p.m.

Dec

30

Weather Warning (Update)

Isolated showers in some areas of the country in the late afternoon.

December 30, 2024
4 p.m.

Diagnosis: The position of the Intertropical Convergence Zone over the country together with atmospheric instability have generated variable rainfall in the country since the morning. Up to this hour, rainfall amounts of 70 mm have been registered in the North Zone (Upala) and the North Pacific (Liberia), between 20 mm and 30 mm in the Central Valley, while in the rest of the country the amounts are between 5 mm and 15 mm.

Forecast: Rainfall will continue in scattered distribution in the Central Valley, Central Pacific, North Pacific and Northern Zone; as well as occasional showers in the mountains of the South Pacific. Maximum amounts between 10 mm and 30 mm are estimated for the next 6 hours.

Rainfall in both regions may extend to the Pacific coastal sector in the early evening.

Warning: Special attention should be paid to the mountainous sectors of the North Pacific and Northern Zone, as well as the South Pacific, due to the fact that the basins have saturation levels between 80% and 90%. Therefore, these sectors are vulnerable to the occurrence of floods and landslides.

Due to the above, the IMN recommends:

  • - Caution for sewer saturation in places prone to this type of flooding.
  • - Prevent 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 the WEB Page: www.imn.ac.cr

     
Juan Diego Naranjo Díaz
Meteorologist
DMSA/IMN