Weather warnings
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...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-020824-1140am
Aug
02
Weather Warning
Heavy showers and thunderstorms this afternoon in the Pacific
August 2nd, 2024
11.40 a.m.
Discussion: The entry of humidity from maritime sectors, added to warm morning temperatures, will favor cloud development this afternoon, generating rainy and electrical activity between moderate and strong intensity and may extend into the early hours of the night.
Forecast: During this afternoon and early evening, heavy rain and downpours with thunderstorms are expected in the Pacific regions, with amounts estimated between 30 mm and 70 mm in periods of 6-12 hours, with possible higher accumulations in a localized manner.
Meanwhile, in the Central Valley, mountainous parts of the Caribbean and the Northern Zone, scattered rains are expected, with accumulations between 10-40 mm in periods of 6-12 hours. Occasional rains are possible in the Caribbean and Northern Zone during the course of the night period.
This Saturday, the passage of tropical wave #22 is expected, although the cloudiness and instability associated with this system moves over the Greater Antilles, the effects of this broad disturbance can lead to an ideal environment for precipitation in the national territory; during the morning in the Caribbean and the North Zone, in the afternoon in regions of the Pacific and Central Valley.
Warning: High soil saturation levels remain in the North Zone, the Caribbean, the South Pacific and the Nicoya Peninsula, increasing vulnerability in these areas. In addition, in urban areas, sewage saturation could lead to flash flooding.
Due to the above, the IMN recommends:
- Be careful due to sewer saturation in places prone to this type of flooding.
- Prevention against electrical storms and seek shelter in a safe place in case of strong gusts of wind 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
Rebeca Morera R
Meteorologist
DMSA-IMN
