Weather warnings
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...
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...
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...
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...
Weather warnings history
In this section you will find the weather warnings history.
Weather Warning
Feb
25
Weather Warning
Cold front #4
February 25, 2020
2.50 pm
As the latest analysis shows, the cold front # 4 will be arriving in the country this weekend. Given this, it is estimated that trade winds begin to accelerate again until reaching speeds between very strong to intense from Thursday night, being Saturday when the major gusts are reached, amounts higher than 120 km / h are estimated in the north of Guanacaste. This new period of intense winds will last at least until Monday.
In addition, the proximity of the cold mass associated with the cold front over the north of the country will be causing a significant reduction in daytime temperatures in the Central Valley and to a lesser extent in the north of the national territory.
On the other hand, the Caribbean, the North Zone and the east / north sector of the GAM will experience an increase in cloud cover and rainfall, intermittent rains are anticipated on Friday and weekend in Limón and mountainous areas of the Zone North, as well as drizzles in the Central Valley.
Due to the above, the IMN recommends: be attentive to the information that the IMN publishes on: Twitter: @IMNCR, Facebook: National Meteorological Institute, Website: www.imn.ac.cr.
Gabriela Chinchilla 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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