Weather warnings

Jul

11

Weather Warning

Tropical wave #14 over Costa Rica this Friday

July 11th, 2025
9:50 a.m.

Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...

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Jul

10

Weather Warning

Tropical Wave 14 to Pass Over Costa Rica This Friday

July 10, 2025
04.30 p.m.

Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...

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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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Weather warnings history

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Aviso Meteorológico-IMN-311224-1130am

Dec

31

Weather Warning

Rains of variable intensity during this afternoon and early evening

December 31, 2024
11.30 a.m.

Discussion: The Intertropical Convergence Zone remains close to the country, along with instability in the upper atmosphere, these are factors that increase the high probability of rain and showers with thunderstorms during this afternoon and early evening, especially in the Central and South Pacific.
In the early morning, cloudy nuclei near the Pacific coasts favored scattered rains in these areas, with amounts less than 10 mm.

Forecast: For this afternoon and early evening, rains of varying intensity and isolated showers with thunderstorms are expected in the Central and South Pacific, amounts between 30-60 mm, with localized accumulations possible. Meanwhile, in the Central Valley, Nicoya Peninsula, Northern Zone and Caribbean mountains, isolated rains and showers with accumulations between 10-40 mm are possible.

Warning: Special attention in the Northern Zone, Northern Caribbean, Southern Pacific and Nicoya Peninsula due to high levels of saturation (80% and 90%). Therefore, these are areas vulnerable to the occurrence of floods and landslides.

Due to the above, the IMN recommends:

  • Caution due to sewer saturation in places prone to this type of flooding.
  • Prevention against thunderstorms and seek shelter in a safe place if 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 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

Rebeca Morera R.
Meteorologist
DMSA/IMN