Weather warnings

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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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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Aviso Meteorológico-IMN- 211020-1030am

Oct

21

Weather Warning

Rainy conditions on this day

October 21, 2020
10.30 a.m.

Discussion: The Intertropical Convergence Zone remains very active positioned over Costa Rica, favoring the presence of cloudiness and rain in much of the country; especially in the Central Pacific, South Pacific and South Caribbean. In the last 3 hours accumulated between 10-65 mm are registered, the highest in the Osa Peninsula.

Forecast: In the remainder of the morning, rains and downpours will persist in the South Pacific, South Caribbean, in isolation in coastal areas of the Central Pacific and the Nicoya Peninsula, accumulated between 25-50 mm.

In the afternoon, rains of variable intensity are expected in the Pacific and Central Valley regions, amounts between 30-60 mm, possibly larger accumulated in a localized way. On the other hand, in the North Zone and mountains of the Caribbean, isolated showers with electrical storms are expected with amounts between 25-50 mm. The rains will extend into the evening hours, especially in the Pacific.

Tropical wave # 47 is over Panama, its arrival in the national territory is estimated at night, which can lead to rains in coastal areas of the Caribbean and the Central and South Pacific during the night period from Wednesday to early Thursday morning.

Warning: Special attention to the high percentage of soil saturation in the South Pacific, Central Pacific, Nicoya Peninsula and the upper parts of the North Zone.

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