Weather warnings
Jul
14
Aviso Meteorológico
Onda tropical #15 transitando este lunes por el país
14 de julio de 2025
10:00 AM
Diagnóstico: La onda tropical #15 ingresó al país durante la madrugada. Aunque es una onda débil, ha generado lluvias y tormentas en zonas marítimas del Pacífico Central, el Caribe y en áreas...
Jul
13
Aviso Meteorológico Informativo
Tropical Wave #15 transiting over Costa Rica early Monday morning
July 13h, 2025
6 p.m.
Diagnosis: During the course of early Monday morning, tropical wave #15 will be passing over the national territory. Although it is a weak tropical wave, it will be interacting with the...
Jul
11
Weather Warning
Tropical wave #14 over Costa Rica this Friday
July 11th, 2025
9:50 a.m.
Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...
Jul
10
Weather Warning
Tropical Wave 14 to Pass Over Costa Rica This Friday
July 10, 2025
04.30 p.m.
Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-180820-0300pm
Aug
18
Weather Warning
Downpours and thunderstorm in the Central and South Pacific
August 18, 2020
03.00 p.m.
Discussion: In the early hours of the afternoon there have been rains and downpours with an isolated electrical storm, mainly in the regions of the Central and South Pacific; This situation has been favored by the proximity of the Intertropical Convergence Zone, the warm morning temperatures and the entry of sea breezes. The accumulated precipitation in the last 3 hours oscillate between 10-25 mm.
Forecast: During this afternoon, rains of variable intensity and isolated showers with thunderstorms will continue to be witnessed in the Central and South Pacific regions, as well as in the Nicoya Peninsula, with amounts between 25-50 mm, possibly accumulated higher than located. In the North Zone (Upala and surrounding areas), the Central Valley (western and central sector) and the Caribbean mountains, rains and isolated showers with storm are expected, amounts estimated between 10-45 mm.
It is estimated that the precipitations extend to the first hours of the night in the Pacific and to a lesser extent in the Central Valley and North Zone, accumulated between 10-30 mm.
Warning: High levels of soil saturation prevail in the North and South Pacific Zone; therefore, particular attention is recommended.
Due to the above, the IMN recommends:
- Caution in areas vulnerable to flooding due to sewer saturation.
- Take shelter in a safe place in case of hearing an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling tree branches, power lines, among others.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr
Rebeca Morera R
Meteorologist
DMSA-IMN
