Weather warnings
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...
Jun
13
Aviso Meteorológico
Mayor ocurrencia de precipitación en el Pacífico-Actualización-
12 de junio de 2025
11:40 p.m.
Diagnóstico: El ingreso de humedad hacia el territorio nacional, así como la cercanía de la Zona de Convergencia Intertropical, han favorecido precipitaciones con tormenta eléctrica de variable...
Jun
12
Weather Warning (Update)
Greater occurrence of rainfall in the Pacific
June 12, 2025
5:00 p.m.
Diagnostic: The Intertropical Convergence Zone is beginning to strengthen off the Pacific coast of Costa Rica, increasing the flow of moisture from the ocean to both sides of the country. ...
Jun
12
Weather Warning
Increased rainfall in the Pacific
June 12, 2025
10.00 a.m.
Discussion: The Intertropical Convergence Zone is beginning to strengthen off the Pacific coast of Costa Rica, increasing the intensity of the moisture flow entering from the oceanic sector...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-091024-430pm
Oct
09
Weather Warning (Update)
Unstable conditions remain over our country this afternoon and evening
October 09, 2024
4:30 p.m.
Diagnosis: We continue with a high humidity content in the country, which is being caused by the position of the Intertropical Convergence Zone and the systems in the middle and upper atmosphere. Accumulations since 7:00 a.m. by region are in the following ranges:
• Northern Zone between 15-30 mm.
• Northern Caribbean between 5-20 mm.
• Southern Caribbean between 10-20 mm, with a maximum of 42 mm at the Turrialba Volcano.
• Northern Pacific between 10-40 mm, with a maximum of 64 mm in Hojancha.
• Central Pacific and Southern Pacific between 10-40 mm, with a maximum of 50 mm in Ciudad Neily.
• Central Valley between 15-45 mm, especially in sectors to the south.
Forecast: For the rest of the afternoon today, showers with storms are expected to continue in the Northern Zone and the western Caribbean. The estimated accumulated rainfall would be between 10 - 30 mm with maximum rainfall of 30 - 60 mm. In the case of the Pacific regions, variable rainfall with occasional storms is expected, especially in coastal areas. The accumulated rainfall would be between 10 - 30 mm with maximum rainfall of 60 mm. On the other hand, in the Central Valley, intermittent rainfall is expected with accumulated rainfall varying between 10-30 mm.
Warning: Very saturated soil conditions continue throughout the central mountainous part of the country on both sides, the Central Valley and in low areas of both peninsulas in the Pacific. In addition, a large part of the Northern Zone registers high saturation values. This situation indicates a risk of incidents due to saturation of sewers, flooding of rivers or landslides in areas where the occurrence of rainfall is estimated during this day.
Due to the above, the IMN recommends:
• Caution due to sewer saturation in places prone to this type of flooding.
• Prevention against electrical storms and seek shelter in a safe place in case of strong gusts of wind near storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach 80 km/h in some isolated cases.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Paulo J. Solano S.
Meteorologist
DMSA-IMN
