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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Weather warnings history

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Aviso Meteorológico-IMN-270624-0530pm

Jun

27

Weather Warning (Update)

Influence of the Central American Gyre this Thursday

June 27, 2024
05.30 p.m.

Discussion: The development of a Central American Gyre in the region is generating a constant flow of humidity from the Pacific Ocean to the national territory, causing rainy conditions during the course of this day. At this time, the most significant rains are concentrated in the North Pacific, South Pacific and the Caribbean. The highest amounts in the last 6 hours have been recorded at the following stations: Liberia 47 mm, Nosara 34 mm, Santa Rosa and Hojancha 30 mm, Osa 40 mm, Talamanca 61 mm, Los Chiles 33 mm among others.

Forecast: Rainy conditions will continue in the different regions of the country in the late afternoon and during the night.

In the Pacific regions (especially in the North and South) rains of varying intensity are expected. Accumulations are estimated between 20 - 50 mm with maximum amounts of 70 - 100 mm in 12-hour periods.
For the Central Valley, cloudy conditions and intermittent rains between light and moderate are forecast, in addition to fog and mist banks. Estimated amounts are between 10 - 50 mm. On the other hand, in the Caribbean and the North Zone, rains and heavy showers with thunderstorms will continue, during the night rains of lesser intensity than those recorded in the evening period will prevail. Accumulations are between 30 - 50 mm and possible maximum amounts of 70 mm.

The IMN is closely monitoring the evolution of these disturbances in the atmosphere and will update the information if necessary.

Warning: Saturated soils are recorded in the South Pacific and North Pacific (special attention should be paid to both peninsulas), mountains in the Northern Zone bordering the Central Valley and those in the Guanacaste mountain range. All regions are vulnerable to landslides and possible flooding.

Due to the above, the IMN recommends:

  • Be careful due to sewer saturation in places prone to this type of flooding.
  • Prevention in the event of an electrical storm and seeking shelter in a safe place in case of strong gusts of wind near the storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach 80 km/h in some isolated cases.
  • 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