Weather warnings
Aviso Meteorológico-IMN-141224-11.00 a.m.
Dec
14
Weather Warning
The influence of cold surge #5 is diminishing this afternoon
December 14, 2024
11.30 am
Diagnosis: Cold surge #5 begins to emerge from the Caribbean Sea this Saturday afternoon. In these early hours of the day, the strongest gusts have been recorded at Cerro Buenavista and Volcán Irazú, 90 km/h; at Cerro Cedral (Escazú) 83 km/h and Cerro Chitaría (Santa Ana) 73 km/h, Heredia, Cartago and Alajuela with maximums of 55 km/h.
The low humidity content favors clear skies in 90% of the national territory, and also caused a colder dawn in several parts of the country. Some of the lowest temperatures in urban areas were: La Unión de Cartago 8.6°C, Rancho Redondo de Goicoechea 11.6°C, Coronado 12°C, Ochomogo 13°C, Turrialba 15.9°C, among others.
Forecast: Strong wind gusts will continue to be experienced in the early afternoon, with speeds between 30 km/h and 60 km/h estimated in the Central Valley and the North Pacific, while in the mountainous areas and northern Guanacaste, values between 70 km/h and 95 km/h are expected. However, by late afternoon, the gusts will be lower and will remain moderate.
About precipitation, few of it is expected. Some occasional drizzle in the north of the Northern Zone in the afternoon. In the rest of the country, there is a low possibility of rain, if it occurs, it will be limited to the higher areas.
Warning: Pay special attention to mountainous areas of the Northern Caribbean, Northern Zone and surrounding low areas, because the basins have saturation levels between 85% and 95%.
Due to the above, the IMN recommends:
• Prevention due to gusts of wind and their possible affectation of 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.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Gabriela Chinchilla R
Meteorologist/DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
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...
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Jul
07
Weather Warning
Heavy downpours during the afternoon in the Pacific and northern regions
July 07th, 2025
10.40 a.m.
Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...
Jul
06
Aviso Meteorológico
Efectos de la onda tropical #13 en el país este domingo y lunes
06 de julio de 2025
11.25 am
Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...
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...
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...
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,...
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...
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...
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...
