Weather warnings
May
17
Weather Warning
Scattered heavy downpours with thunderstorms this Saturday
May 17, 2025
10:20 a.m.
Forecast: The passage of Tropical Wave 2, along with local factors such as humid breezes from both sides and warm temperatures, will favor scattered showers and thunderstorms this Saturday...
May
16
Aviso Meteorológico (Actualización)
Lluvias durante el final de la tarde del viernes
16 de mayo de 2025
4.30 p.m.
Diagnóstico: Persiste la inestabilidad atmosférica sobre el país debido a la cercanía de sistemas de baja presión asociados a la Zona de Convergencia Intertropical y factores locales típicos de...
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...
Weather warnings history
In this section you will find the weather warnings history.
Weather Warning-IMN-191123-10:20 a.m.
Nov
19
Weather Warning
Variable rains in South and Central Pacific regions
November 19, 2023
10:20 a.m.
Diagnosis: The Intertropical Convergence Zone, now further south, still maintains instability for these sectors (especially the South and Central Pacific). In addition, local factors such as humidity inflows and instability of the local upper atmosphere will favor rains again in recurring sectors.
Forecast: For the late morning and early afternoon hours, scattered rains and downpours are forecast in mountainous sectors of the South Pacific and Central Pacific, which will extend to lower parts and the west in a more isolated manner, with the presence of a storm. Occasional electricity, towards the end of the afternoon. The estimated amounts will be between 20 – 40 mm with specific maximums of up to 70 mm. The Central Valley will have this type of precipitation with a possible short-duration storm, with estimated amounts between 10 - 30 mm with localized maximums of 45 mm.
The Caribbean and Northern regions will experience showers in the mountains, with very localized downpours in lower parts. The estimated amounts will be between 10 – 20 mm with maximums of 50 mm.
At the end of the afternoon, isolated showers with amounts of less than 40 mm will occur around the Peninsula and Gulf of Nicoya.
Warning: Soil saturation persists in the South Pacific, Central Pacific, Northern Zone and mountainous Northern Caribbean, due to the recurrent rainfall these days.
Due to the above, the IMN recommends:
• Caution due to sewage saturation and possible flash floods, as well as the main routes of the country in the event of heavy rain events.
• Prevention against electrical storms and seeking shelter in a safe place in case strong gusts of wind occur or are perceived near storm clouds, due to the possible fall of tree branches, power lines, among others.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr
Jose Valverde Mora
Meteorologist
DMSA-IMN
