Weather warnings

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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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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Weather warnings history

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Aviso Meteorológico-IMN-050820-1030am

Aug

05

Weather Warning

Heavy rainfall and thunderstorm during the afternoon

August 05, 2020
10.30 a.m.

Discussion: The Intertropical Convergence Zone is very active and close to the country, which added to the warm morning temperatures and the entry of humidity from the maritime sectors will favor moderate to heavy rainy events during the afternoon and early evening hours.

Forecast: During the afternoon, showers and showers with an electrical storm are expected in the Pacific, Central Valley and North Zone regions, accumulated estimates are estimated between 30-60 mm, possibly higher amounts in a timely manner. In the Caribbean, isolated rains are expected in the mountainous sectors, accumulated between 10-30 mm.

During the first hours of the night, the rains tend to decrease gradually in the mentioned regions, being witnessed in isolation, mainly in the Pacific coastal areas.

Warning: Special attention in the Central Pacific and Nicoya Peninsula regions where more intense episodes of rain are expected.
Due to the above, the IMN recommends:

  • Caution in areas vulnerable to flooding due to sewer saturation.
  • Take refuge in a safe place in case of listening to an electrical storm or perceiving strong gusts of wind near storm clouds, as well as caution for possible falling tree branches, power lines, among others.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr

Rebeca Morera R
Meteorologist
DMSA-IMN