Weather warnings
Aviso Meteorológico-IMN-201123-5:15p.m.
Nov
20
Weather Warning
Afternoon rains continue for the night period
November 20, 2023
5.15 p.m.
Diagnosis: Local factors and instability associated with the Intertropical Convergence Zone generate rains during the evening period. Currently there are rains in several parts of the country. The accumulations reported since 7 am in the Central Valley range between 15 – 25 mm with localized maximums of 50 mm in Santa Lucía and Santa Barbara de Heredia. In the North Pacific there are amounts between 5 – 20 mm with a maximum located of 65 mm in Carrillo de Guanacaste. The Central Pacific and South Pacific accumulated between 10 – 30 mm with maximums of 50 mm in Rosario de Desamparados. In the rest of the country there are rains between 5 – 20 mm.
Forecast: Rainy activity is expected to persist, however, with weak to moderate intensity during the rest of the afternoon and evening hours. In the North Pacific, Central Pacific, South Pacific and Central Valley, amounts between 10 – 30 mm with maximums of 50 mm are expected to be generated in a period of 6 to 12 hours. In the Caribbean and Northern Zone, amounts are expected to be below 30 mm.
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
Paulo J. Solano S.
Meteorologist
DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
May
18
Weather Warning
Scattered showers and thunderstorms this Sunday in recurring sectors
May 18, 2025
09:40 a.m.
Diagnosis: Local factors such as humid Pacific breezes and warm temperatures will favor scattered showers with thunderstorms this Sunday afternoon in areas where significant rainfall has occurred...
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...
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...
May
13
Weather Warning (UPDATE)
Tropical Wave #1 crossing Costa Rica this Tuesday
13 de mayo de 2025
05.30 p.m.
Discussion: Tropical Wave 1 entered the country early this morning and, in conjunction with the Intertropical Convergence Zone, has generated very unstable atmospheric conditions across the...
May
13
Aviso Meteorológico
Onda Tropical #1 atravesando el país este martes desde la madrugada
13 de mayo de 2025
9.45 am
Diagnóstico: La onda tropical # 1 ingresó al país esta madrugada generando precipitaciones con tormenta eléctrica recurrente en el Caribe, Zona Norte y Valle Central, los acumulados más elevados...
