Weather warnings
May
09
Aviso Meteorológico
Heavy downpours with thunderstorms this afternoon on the Pacific side
May 9, 2025
10:00 am
Diagnostic: The Intertropical Convergence Zone remains positioned near our country. Additionally, local factors such as high temperatures and the entry of sea breezes contribute to favorable...
May
08
Meteorological Warning Update
(Update) Showers and thunderstorms during the afternoon and early morningmeras horas de la noche
May 8, 2025
6:00 pm
Forecast: Rainy conditions have been observed this afternoon on the Pacific coast, much of the Central Valley, and mountainous areas of the Caribbean and the Northern Zone, due to the activity of...
May
08
Weather Warning
Showers and thunderstorms during the afternoon and early evening
May 08, 2025
10.30 a.m.
Discussion: The Intertropical Convergence Zone remains located over Costa Rica, generating significant moisture and instability. This, along with morning warming and the arrival of sea breezes,...
May
07
Aviso Meteorológico Actualización
(Actualización) Lluvias y aguaceros fuertes en el Valle Central y la vertiente del Pacífico
7 de mayo de 2025
6:20 pm
Diagnóstico: La Zona de Convergencia Intertropical sobre el país, en conjunto con factores locales como el calentamiento diurno y el ingreso de humedad desde el Océano Pacífico, favorecerá...
May
07
Weather Warning
Heavy rain and downpours in the Central Valley and the Pacific slope
May 7, 2025
09:35 a.m.
Diagnosis: The Intertropical Convergence Zone (ITCZ), combined with local factors such as daytime warming and the entry of moisture from the Pacific Ocean, will favor variable rainfall throughout...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-220524-0930 a.m.
May
22
Weather Warning
Chance of heavy thundershowers this afternoon in Costa Rica
May 22, 2024
9.30 a.m.
Diagnosis: This Wednesday, the Intertropical Convergence Zone is located off the Pacific coast of Costa Rica, increasing atmospheric instability in the national territory. Therefore, isolated but intense downpours with thunderstorms are expected in the national territory for this afternoon and early evening.
Forecast: The areas with the highest probability of heavy rains are the Central Pacific, the South Pacific and the mountainous sectors of the Caribbean as well as the North and East (Cartago province) of the Central Valley. Accumulated amounts are estimated between 30 mm and 60 mm, with maximum accumulated amounts between 80 mm and 100 mm.
In the rest of the country, rainfall will be more isolated and the estimated amounts will be between 20 mm and 40 mm. Rains are expected to continue in the early evening, mainly in the Pacific coast.
Warning: Attention in the cantons of Parrita, Quepos and Osa, due to the saturation of the soil by the rains of the previous day. In the mountain passes in the mountainous sectors of the Caribbean and the north of the Central Valley, as there could be small landslides on the road. In general, be alert to the development of storm clouds, which present their own significant characteristics such as descending gusts, high precipitation intensity in short periods of time and electrical discharges.
Due to the above, the IMN recommends:
- Caution for sewer saturation in places prone to this type of flooding.
- Prevention before thunderstorms and seek shelter in a safe place in case of strong gusts of wind 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 WEB Page: www.imn.ac.cr
Juan Diego Naranjo Díaz
Meteorologist
DMSA-IMN
