Weather warnings
Aviso Meteorológico-IMN-091024-11.20 am
Oct
09
Weather Warning
Unstable conditions remain over our country this afternoon and evening
October 09, 2024
11:20 am
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. The precipitations have remained active on the Pacific side during the early morning and the morning, with accumulations between 10 to 30 mm (mainly in the South Pacific). In addition, satellite images show cloud developments extending towards the Talamanca mountain range and the Central Volcanic mountain range.
Forecast: For this afternoon, showers with thunderstorms are expected in the North Zone and west of the Caribbean. The estimated accumulations would be between 10 - 50 mm with maximum amounts between 50 - 70 mm. In the case of the Pacific regions, variable rainfall is expected with occasional thunderstorms and mainly over the mountains. The accumulations would be between 20 - 40 mm with maximum amounts of 70 mm. On the other hand, intermittent rains are expected in the Central Valley with accumulated amounts 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 sewer saturation, river flooding or landslides in areas where rain is estimated to occur during this day.
Due to the above, the IMN recommends: • Caution due to sewer saturation in places prone to this type of flooding. • Prevention in the event of an electrical storm and seeking shelter in a safe place in the event of strong gusts of wind occurring or perceived 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 media: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr
Gabriela Chinchilla R Meteorologist DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
May
16
Aviso Meteorológico
Actividad lluviosa variable esta tarde de viernes
16 de mayo de 2025
11:00 am
Diagnóstico: Persiste la inestabilidad atmosférica sobre el país debido a la cercanía de sistemas de baja presión asociados a la Zona de Convergencia Intertropical. A esto se suman factores...
May
15
Aviso Meteorológico (Actualización)
Aviso Meteorológico-IMN-150525-Condiciones lluviosas en esta tarde y noche (actualización)
15 de mayo de 2025
6:00 pm
Diagnóstico: La Zona de Convergencia Intertropical se encuentra próxima a Costa Rica y, junto con condiciones de inestabilidad en niveles altos de la atmósfera y factores locales, ha generado un...
May
15
Weather Warning
Rainy conditions this afternoon and evening
May 15, 2025
10.45 a.m.
Discussion: The Intertropical Convergence Zone near Costa Rica and instability in the upper atmosphere, along with morning warming, are contributing factors to the presence of cloudiness and...
May
14
Weather Warning (Update)
Instability after the passage of Tropical Wave #1
May 14, 2025
04.35 p.m.
Discussion: Atmospheric instability persists over Costa Rica following the passage of Tropical Wave #1 yesterday. This, along with activity associated with the Intertropical Convergence Zone...
May
14
Weather Warning
Instability after the passage of Tropical Wave #1
May 14, 2025
10:00 a.m.
Diagnosis: Tropical Wave #1 is located far from the national territory. However, after its passage, atmospheric instability persists in the region. This condition, together with increased...
May
13
Weather Warning (UPDATE)
Tropical Wave #1 crossing Costa Rica this Tuesday
13 de mayo de 2025
05.30 p.m.
Discussion: Tropical Wave 1 entered the country early this morning and, in conjunction with the Intertropical Convergence Zone, has generated very unstable atmospheric conditions across the...
May
13
Aviso Meteorológico
Onda Tropical #1 atravesando el país este martes desde la madrugada
13 de mayo de 2025
9.45 am
Diagnóstico: La onda tropical # 1 ingresó al país esta madrugada generando precipitaciones con tormenta eléctrica recurrente en el Caribe, Zona Norte y Valle Central, los acumulados más elevados...
May
12
Weather Warning
Variable rains during the afternoon on Monday and the passage of the tropical wave this Tuesday
May 12, 2025
03:40 p.m.
Diagnosis: The increase in moisture content from both sides, combined with local factors such as Pacific breezes and high daytime temperatures, have favored the presence of heavy downpours with...
May
11
Weather Warning
Rain of varying intensity this Sunday
May 11, 2025
12:40 p.m.
Forecast: This Sunday, the Intertropical Convergence Zone (ITCZ) is approaching the country, and moisture content is gradually increasing in the region. This system, combined with daytime warming...
May
10
Weather Warning
Rainy activity this Saturday
May 10, 2025
9:05 a.m.
Diagnosis: This Saturday, the Intertropical Convergence Zone remains over the national territory. In addition, high atmospheric pressure levels are increasing the intensity of the trade winds...
