Weather warnings
Aviso Meteorológico-IMN-310525
May
31
Weather Warning
Variable rains in the country this Saturday and tropical wave #4 tomorrow Sunday
May 24, 2025
11.40 am
Forecast: This weekend, the Intertropical Convergence Zone (ITC) is active again off the Costa Rican Pacific, causing downpours in the South Pacific and intermittent rain events in the Central Pacific early this morning and into the morning. Tropical Wave 4 is located east of Panama and is expected to cross our country tomorrow.
Forecast: For Saturday afternoon and evening, variable rainfall is expected on the Pacific side, especially in the Central and South Pacific, as well as the Nicoya Peninsula. Rainfall amounts between 25 and 60 mm are expected over a period of 3 to 6 hours. Isolated showers with occasional thunderstorms are expected in the northern zone, the Central Valley, and central Guanacaste, with rainfall amounts between 10 and 45 mm over the same periods.
Tropical Wave 4 will modulate weather conditions in our country this Sunday, increasing humidity and instability as it passes. The regions most likely to see increased rainfall are the Central Pacific, South Pacific, and the Northern Zone, especially in the late afternoon and evening of this Sunday.
Warning: Saturated soils are found in the plains of the Nicoya Peninsula, the Northern Caribbean, Braulio Carrillo National Park, and the Sarapiquí Basin. High saturation levels are also being recorded in the basins of the South Pacific.
Due to the above, the IMN recommends: • Caution due to sewer saturation in areas prone to this type of flooding. • Prepare for thunderstorms and seek shelter in a safe place if strong wind gusts occur or are perceived near storm clouds, due to the possible fall of tree branches, power lines, among other things. These gusts can reach 80 km/h in some isolated cases. • Stay informed through social media: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR, and the website: www.imn.ac.cr
Gabriela Chinchilla Ramírez Meteorologist DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
Jun
17
Aviso Meteorológico
Condiciones lluviosas en el Caribe y Zona Norte este martes
17 de junio de 2025
11.30 am
Diagnóstico: Luego del paso de la onda tropical #6 sobre Costa Rica ayer lunes, se mantiene la inestabilidad en el territorio nacional aunado a la cercanía de la Zona de Convergencia...
Jun
16
Weather Warning (Update)
Tropical Wave #6 over Costa Rica
June 16, 2025
6:30 p.m.
Forecast: The passage of Tropical Wave No. 6 over Costa Rica, along with the proximity of the Intertropical Convergence Zone, presents a highly unstable environment for the country. Heavy rains...
Jun
16
Weather Warning
Tropical Wave #6 over Costa Rica
16 de junio de 2025
10:00 a.m.
Diagnosis: The passage of tropical wave No. 6 over Costa Rica, together with the proximity of the Intertropical Convergence Zone, maintains a very unstable environment in the country, favorable for...
Jun
16
Weather Warning
Unstable atmospheric pattern this morning
June 16, 2025
12:30 a.m.
Diagnosis: Atmospheric instability, associated with both the proximity of the Intertropical Convergence Zone and the presence of a low-pressure system in the Pacific Ocean, located off the coast...
Jun
15
Weather Warning | Update
Rains of varying intensity in recurring sectors
June 15, 2025
5:35 p.m.
Diagnosis: The unstable pattern persists over the country, associated with the proximity of the Intertropical Convergence Zone, high temperatures, and the presence of a low-pressure system...
Jun
15
Aviso Meteorológico
Lluvias de variable intensidad en sectores recurrentes
15 de junio de 2025
09:55 a.m.
Diagnóstico: Persiste el patrón inestable sobre el territorio nacional, asociado a la cercanía de la Zona de Convergencia Intertropical, las altas temperaturas y la presencia de un sistema de...
Jun
14
Aviso Meteorológico
Persiste alta inestabilidad sobre el territorio nacional
14 de junio de 2025
9:30 a.m.
Diagnóstico: Continúa el patrón inestable sobre el territorio nacional, debido a varios factores. Tras el paso de la onda tropical número 5, la Zona de Convergencia Intertropical ha mostrado un...
Jun
14
Aviso Meteorológico (Actualización)
Onda tropical #5 transitando por el país este viernes -Actualización-
14 de junio de 2025
12:25 a.m.
Diagnóstico: Condiciones atmosféricas inestables se presentaron durante este viernes en el país debido a factores como: la Onda Tropical #5 (OT#5) transitando sobre el territorio nacional y un...
Jun
13
Weather Warning (Update)
Tropical Wave #5 over Costa Rica this Fraday
June 13, 2025
4:45 p.m.
Diagnosis: Unstable atmospheric conditions this Friday in the country are due to factors such as Tropical Wave #5 (OT#5) passing over the country today, a low-pressure system belonging to the...
Jun
13
Aviso Meteorológico
Onda tropical #5 transitando por el país este viernes
13 de junio de 2025
9:30 am
Diagnóstico: Condiciones atmosféricas inestables se proyectan para este día en el país, esto debido a varios factores. Por un lado, la Onda Tropical #5 (OT#5) se posiciona al oeste de Panamá y...
