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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Aviso Meteorológico-IMN-210920-0330pm

Sep

21

Weather Warning

Downpours and thunderstorm persist during the afternoon and early evening

September 21, 2020
03.30 p.m.

Discussion: The warm temperatures registered this morning and the entry of sea breezes have caused cloudy developments this afternoon and in turn isolated but strong downpours accompanied by an electrical storm in regions of the Pacific and Central Valley with accumulated between 15-52 mm in the last two hours.

Forecast: For the remainder of this afternoon, moderate rains and isolated but strong downpours will continue, accompanied by a thunderstorm in the Pacific and Central Valley regions, estimates are between 30-60 mm, possibly higher accumulated in a localized manner. On the other hand, in the North Zone and mountains of the Caribbean rains and storms are estimated, accumulated between 20-40 mm.

Rainfall will last during the first hours of the night in regions of the Pacific and Northern Zone, amounts between 20-40 mm.

Warning: Soil saturation in the North Zone and mountainous sectors of the Central and South Pacific, special attention is recommended.

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


By Rebeca Morera 9/21/20 9/21/20 9/21/20