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...

See More


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,...

See More


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...

See More


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...

See More


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...

See More


Weather warnings history

In this section you will find the weather warnings history.

« Back

Aviso Meteorológico-IMN-200920-

Sep

20

Weather Warning

Rainy conditions in the Pacific during the afternoon and night

September 20, 2020
10.30 am

Diagnosis: The Intertropical Convergence Zone, as well as the entry of humidity from maritime sectors and the morning warming have favored intense rainy conditions in the Central and South Pacific.

Forecast: During the afternoon in the Pacific and Central Valley, there will be intermittent rainy conditions, particularly in the Central and South Pacific. Precipitation amounts between 40-60 mm are expected in the Pacific and amounts between 10-30 mm in the Central Valley, particularly in the west of the Valley. In the Northern Zone, isolated showers are expected with storms with amounts between 25-40 mm, for the Caribbean mountains isolated showers with amounts between 10-30 mm are expected.

Warning: Special attention in all Pacific regions, particularly in the possibility of landslides in the mountainous sectors of the west of the Central Valley and 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


Daniel Poleo

Meteorologist

DMSA-IMN