Weather warnings
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
5:50 p.m.
Forecast: Tropical Wave 4 is over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude, providing high...
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
11.10 am
Diagnosis: is located over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude,...
May
31
Aviso Meteorológico (Actualización)
Lluvias variables en el país este sábado y onda tropical #4 mañana domingo
31 de mayo de 2025
5 pm
Diagnóstico: Este fin de semana la Zona de Convergencia Intertropical se muestra activa nuevamente frente al Pacífico costarricense; lo cual ha ocasionado aguaceros en el Pacífico Sur y eventos...
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...
May
30
Weather Warning
Variable morning rains this Friday in the Caribbean regions
May 30, 2025
7:30 a.m.
Diagnosis: High humidity levels in southern Central America, combined with instability in the upper troposphere in the region, have favored variable rainfall in the Caribbean and parts of the...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-170624-06:20pm
Jun
17
Weather Warning (Update)
Isolated showers and thunderstorms in the Northern Zone and North Pacific
June 17, 2024
6:20 p.m.
Diagnosis: During the afternoon of this Monday there has been a thunderstorm in sectors of the North Zone and North Pacific, especially near the mountains. The maximum accumulations since 12:00 p.m. in these sectors range between 10 mm and 40 mm. This in sectors of Upala, Tenorio Volcano. On the other hand, in Guanacaste the accumulations in the last 6 hours remain below 10 mm.
Forecast: During this night, variable rains are expected with the possibility of thunderstorms in the North Zone and east and south of the North Pacific. The estimated accumulations in periods of 6 hours will remain in ranges of 15 mm and 45 mm, with possible higher localized amounts.
In the rest of the sectors of the country the probability of rain, showers and thunderstorms is very low. The projected amounts would occur in a localized manner and below 10 mm in periods of 6 hours.
There is a possibility of fog banks in the Central Valley and mountains of the Northern Zone, the Northern Caribbean and the Central Pacific during tonight and early morning.
Warning: The rains that may occur in urban areas can cause flash flooding and sewer saturation due to the high saturation of the soil. There is a possibility of landslides in saturated soils in the mountains of the Northern Zone.
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 the 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 Solano
Meteorologist
DMSA-IMN
