Weather warnings

Jul

15

Informative Weather Advisory

Saharan Dust and Strong Wind Gusts Affecting Several Regions

July 15, 2025
9:00 am

  A dry air mass accompanied by Saharan dust is positioned over the Caribbean Sea and Central America. Additionally, a marked atmospheric pressure gradient is accelerating the trade winds...

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Jul

14

Aviso Meteorológico

Onda tropical #15 transitando este lunes por el país

14 de julio de 2025
10:00 AM

Diagnóstico: La onda tropical #15 ingresó al país durante la madrugada. Aunque es una onda débil, ha generado lluvias y tormentas en zonas marítimas del Pacífico Central, el Caribe y en áreas...

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Jul

13

Aviso Meteorológico Informativo

Tropical Wave #15 transiting over Costa Rica early Monday morning

July 13h, 2025
6 p.m.

Diagnosis: During the course of early Monday morning, tropical wave #15 will be passing over the national territory. Although it is a weak tropical wave, it will be interacting with the...

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Jul

11

Weather Warning

Tropical wave #14 over Costa Rica this Friday

July 11th, 2025
9:50 a.m.

Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...

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Jul

10

Weather Warning

Tropical Wave 14 to Pass Over Costa Rica This Friday

July 10, 2025
04.30 p.m.

Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...

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Weather warnings history

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Weather Warning-IMN-040225-10.40.00 a.m.

Feb

04

Weather Warning

Windy conditions persist this week

February 4, 2025
10:40 a.m.

Diagnosis: High levels of atmospheric pressure north of the Caribbean Sea basin favor windy conditions in the national territory. This Tuesday, maximum gusts between 60 km/h and 89 km/h were recorded in central and northern Guanacaste. In the Central Valley and other central mountainous areas, between 40 km/h and 72 km/h. Mostly stable conditions are present in the national territory, with no significant rainfall in the last 12 hours.

Forecast: Atmospheric pressure will remain high for much of this week, which favors the occurrence of strong to very strong gusts towards the mountains, in the center and north of the national territory on Tuesday. In the lower areas of the Central Valley and the North Pacific, gusts of between 30 km/h and 60 km/h are expected, while in the north of Guanacaste and the mountains, gusts of between 60 km/h and 95 km/h are expected (with the possibility of occasional slightly higher gusts in these areas). On the other hand, this Tuesday, the country will be mostly stable. However, it is possible that the incursion of cloudiness towards the south of the South Pacific in the afternoon will generate scattered showers, with accumulations close to 30 mm in periods of 3 to 6 hours.

Warning: Special attention in the mountains and in the surrounding low areas, due to the presence of strong to very strong gusts.

Due to the above, the IMN recommends:

• Prevention due to wind gusts and their possible damage to roofs, electrical wiring, signs, trees; as well as in the mountainous parts of the country and Guanacaste (national parks, volcanoes).

• Caution in air navigation due to increased turbulence, as well as in maritime navigation due to increased rough seas, especially in the North Pacific, Gulf of Nicoya and northern Central Pacific.

• Avoid fires of any kind, as they can get out of control.

• Caution due to saturation of sewers in places prone to this type of flooding, as well as increased flow in rivers and streams.

• Stay informed through social networks: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the website: www.imn.ac.cr

Jose Valverde Mora.

Meteorologist

DMSA/IMN