Weather warnings
Jul
20
Aviso Meteorológico
Influencia de la Onda Tropical #17 y condiciones ventosas persistentes
20 de julio de 2025
10:00 am
Diagnóstico: Durante este día, la Onda Tropical #17 estará transitando por el país. Además, persiste un patrón ventoso en el centro y norte del territorio nacional, con ráfagas que alcanzan hasta...
Jul
19
Aviso Meteorológico
Condiciones lluviosas en el Caribe y Zona Norte; ráfagas intensas en el centro y norte del país
19 de julio de 2025
9:00 am
Diagnóstico: Luego del paso de la Onda Tropical #16 el viernes, persisten condiciones atmosféricas inestables sobre el país. A esto se suma el aporte de humedad desde el Mar Caribe por efecto del...
Jul
18
Weather Warning
Tropical wave over Costa Rica on Friday leaves rains in the country
July 18, 2025
9:30 am
Diagnosis: The entry of tropical wave No. 16 over Costa Rica has left rains since early morning in both the Caribbean and the Northern Zone, registering values between 30 mm and 60 mm along the...
Jul
18
Aviso Meteorológico
Mayor ocurrencia de precipitación en la Zona Norte y Caribe
18 de julio de 2025
03:30 a.m.
Diagnóstico: El ingreso de humedad hacia el territorio nacional, así como los vientos alisios continúan acelerados hacia Costa Rica y provocan el arrastre de nubosidad desde el Caribe hacia la...
Jul
17
Aviso Meteorológico
Incremento en el patrón de lluvias en el Caribe y la Zona Norte
17 de julio de 2025
11.00 a.m.
Diagnóstico: Desde tempranas horas del jueves la presencia de polvo del Sahara ha disminuido notablemente y al mismo tiempo se ha incrementado el contenido de humedad en el ambiente, generando el...
Weather warnings history
In this section you will find the weather warnings history.
Weather Warning-IMN-150624-5:15 p.m.
Jun
15
Weather Warning (Update)
Saturday with variable rains for the Pacific slope and Central Valley
June 15, 2024
5:15 p.m.
Diagnosis: A wide region of instability over all of Central America, due to large-scale forcing along the Intertropical Convergence Zone and the passage of tropical waves, has caused heavy downpours to occur this Saturday in our country in coastal areas of the South Pacific and North Pacific, in addition to cloudy conditions with variable rainfall in the Central Valley, Central Pacific and downpours with storms in the Northern Zone and mountainous parts of the Caribbean.
In the last 12 hours the accumulated rainfall recorded by region is: for the North Pacific between 30 – 50 mm with maximums of 90 mm (Tamarindo), for the South Pacific between 10 – 40 mm with a maximum of 118 mm (Osa), in the Central Valley and Central Pacific between 10 – 50 mm, while the regions of the western Caribbean along with low parts of the Northern Zone, record accumulated rainfall between 5 – 40 mm.
Forecast: Localized showers are expected to continue in the late afternoon in low areas and near the Caribbean coasts. Accumulated amounts will be between 10 - 40 mm with maximums of up to 65 mm. In the case of the Pacific side, there will be occasional cloud cover and the possibility of moderate rain during the late afternoon and evening hours. Accumulated amounts will be between 10 - 40 mm.
For the early morning period, scattered showers are expected to occur again on the coasts of the Central Pacific, the North Pacific and around the Golfo Dulce. Accumulated amounts will be between 30 - 50 mm with maximums of 70 mm.
For the Central Valley, the probability of moderate to light rain will continue until Sunday, with scattered fog today, along with fog banks during the early morning and Sunday morning.
Warning: The rains forecast for the Pacific coastal sector and low-lying areas could cause flooding due to overflowing rivers and ravines (peninsular areas). Possibility of landslides on saturated soils in the mountains of the South Pacific, Central Pacific and western Caribbean.
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 networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Jose Pablo Valverde Mora
Meteorologist
DMSA-IMN
