Weather warnings
May
08
Meteorological Warning Update
(Update) Showers and thunderstorms during the afternoon and early morningmeras horas de la noche
May 8, 2025
6:00 pm
Forecast: Rainy conditions have been observed this afternoon on the Pacific coast, much of the Central Valley, and mountainous areas of the Caribbean and the Northern Zone, due to the activity of...
May
08
Weather Warning
Showers and thunderstorms during the afternoon and early evening
May 08, 2025
10.30 a.m.
Discussion: The Intertropical Convergence Zone remains located over Costa Rica, generating significant moisture and instability. This, along with morning warming and the arrival of sea breezes,...
May
07
Aviso Meteorológico Actualización
(Actualización) Lluvias y aguaceros fuertes en el Valle Central y la vertiente del Pacífico
7 de mayo de 2025
6:20 pm
Diagnóstico: La Zona de Convergencia Intertropical sobre el país, en conjunto con factores locales como el calentamiento diurno y el ingreso de humedad desde el Océano Pacífico, favorecerá...
May
07
Weather Warning
Heavy rain and downpours in the Central Valley and the Pacific slope
May 7, 2025
09:35 a.m.
Diagnosis: The Intertropical Convergence Zone (ITCZ), combined with local factors such as daytime warming and the entry of moisture from the Pacific Ocean, will favor variable rainfall throughout...
May
06
Weather Warning (Update)
Heavy showers this afternoon and early evening in the country
May 6, 2025
6:20 p.m.
Diagnosis: The proximity of the Intertropical Convergence Zone, combined with local factors such as daytime warming and the entry of moisture from the Pacific Ocean, has favored heavy downpours...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-020520-1000am
May
02
Weather Warning
Trade winds accelerated on this Saturday
May 02, 2020
10.00 a.m.
Discussion: The increase in atmospheric pressure over the Caribbean Sea generates the acceleration of trade winds towards our country, especially in the north and central part. The gusts have reached maximums in Guanacaste of 88 km/h in La Cruz, 72 km/h in Carrillo, 66 km/h in Santa Cruz; meanwhile in the Central Valley: 60 km/h in Ciudad Colón, 52 km/h in Cerro Chitaría, 56 km/h in Alajuela, 53 km/h in Pavas, among others.
The effect of the wind causes humidity to enter from the maritime zone towards the Caribbean and the North Zone, causing light rains, as well as drizzles in the mountainous Central Valley, the maximum accumulated accumulations are less than 20 mm.
Forecast: The windy pattern will continue strong throughout this Saturday, maximum gusts are estimated in the range of 70-90 km/h in the mountainous areas and northern Guanacaste and between 50-70 km/h for the Central Valley and lower part of Guanacaste.
Regarding rainfall, drizzles and isolated rains are expected during the morning in the Caribbean and North Zone, the rains can manifest again during the night, amounts between 10-20 mm. Drizzles are possible in the north of Guanacaste and in the mountainous sectors of the Central Valley and the vicinity with accumulations that do not exceed 5 mm. While in the Central and South Pacific rains and showers are expected with isolated thunderstorms during the afternoon period and the first hours of the night, with amounts between 25-50 mm.
Due to the above, the IMN recommends:
- Take precautions for strong winds and their possible damage to roofs, electrical wiring, signs, trees; as well as in the mountainous parts of the country (national parks, volcanoes).
- Caution for boats by rough sea and very strong waves in the North Pacific, Gulf of Nicoya, the Caribbean Sea, as well as air navigation due to turbulence over the mountainous sectors.
- Avoid burning of all kinds as they can get out of control.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr
Rebeca Morera R.
Meteorologist
DMSA-IMN
RSS IMN latest alerts(Local Notification): https://www.imn.ac.cr/en/web/imn/avisos-meteorologicos/-/asset_publisher/lTlyP4wEZlDa/rss 
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