Weather warnings

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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Jun

27

Weather Warning -Update-

Rainy Afternoon in Costa Rica

June 27th, 2025
05.40 p.m.

Forecast: After the passage of Tropical Wave 9 yesterday, Thursday, the atmosphere remains unstable over the country. Along with warm morning temperatures and high humidity from recent rains,...

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Jun

27

Weather Warning

Tarde lluviosa en Costa Rica

June 27th, 2025
10:00 am

Diagnosis: After the passage of tropical wave #9 on Thursday, the atmosphere continues to be unstable over the country, which, together with the warm temperatures of this morning and the high...

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Jun

26

Weather Warning | Update

Rainfall activity of varying intensity this afternoon in the Pacific and Northern Zone

June 26, 2025
5:00 p.m.

Diagnostic: The passage of Tropical Wave #9, in combination with the Intertropical Convergence Zone, maintains atmospheric instability over the country. This has generated rain showers and...

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Jun

26

Weather Advisory

Variable intensity rainfall expected this afternoon, in the Pacific and North Zone

June 26th, 2025
9:50 a.m.

Diagnostic: Tropical Wave 9, located in the Pacific near the country, is still unstable in its surroundings. Along with the Intertropical Convergence Zone over southern Central America, it will...

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Weather warnings history

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Aviso Meteorológico -IMN-231120-0510pm

Nov

23

Weather Warning

Rains will extend into the night hours

November 23, 2020
5.10 p.m.

Discussion: The transit of tropical wave # 54 over the country has caused humid and unstable atmospheric conditions and, together with local factors such as warm morning temperatures and the entry of sea breezes, have generated isolated but strong rains and downpours this afternoon in the North Pacific, North Zone and Caribbean mountains, with accumulated maximums of 30 mm in the last five hours.

Forecast: In the rest of the afternoon and early evening, the rains will remain moderate intensity in the North Zone and North Pacific, they are estimated to accumulate between 25-50 mm, possibly higher amounts locally. In the rest of the Pacific there will be rains of variable intensity with amounts between 20-40 mm. On the other hand, in the Central Valley and mountains of the Caribbean, scattered rains and fog banks are possible with accumulated less than 15 mm.

Warning: The soils remain with significant saturation levels, for which reason special attention is reiterated in the North Zone, South Pacific, Nicoya Peninsula and mountains of the Central Pacific.

Due to the above, the IMN recommends:

  • Caution in areas vulnerable to flooding due to sewer saturation.
  • Take shelter in a safe place in case of hearing an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling tree branches, power lines, among others.
  • 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