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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Aviso Meteorológico-IMN-210923- 0400pm

Sep

21

Weather Warning

Showers due to instability this afternoon -Update-

September 21, 2023
4.00 p.m.

Discussion: There is a mostly cloudy sky over the national territory. The proximity of the Intertropical Convergence Zone over the country has generated rain this afternoon in the North Zone and mountainous sectors of the North Pacific. With maximum accumulations of 35 mm in the Northern Zone and 15 mm in the North Pacific.

Forecast: For the rest of the day, these rains and downpours with storms are forecast to continue in sectors of the North Zone and mountains and border sectors of the North Pacific. Those accumulated in the next 6 hours will range between 10 – 30 mm with possible localized maximums.

The Central Pacific and South Pacific will present isolated rains in mountainous sectors with possible accumulations between 5 - 15 mm and possible maximums located in mountainous sectors.

For the Caribbean, a mostly cloudy sky is expected with rain in sectors bordering Nicaragua. Accumulation of between 5-15 mm is estimated in the next 6 hours.

The Central Valley still has a chance of rain to the west, with accumulations between 5-10 mm and possible maximums located in the mountains.

Warning: Special attention to mountainous sectors of the North Zone and North Pacific. This is due to saturated soil conditions, which increases the probability of landslides.

Due to the above, the IMN recommends:

  • Caution due to sewage saturation in places prone to this type of flooding.
  • Prevention against electrical storms and seeking shelter in a safe place in case 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 between 80 to 100km/h in some isolated cases.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr

Paulo Solano
Meteorologist
DMSA-IMN