Weather warnings
Aviso Meteorológico-IMN-090924-Aguaceros fuertes en el Pacífico este lunes
Sep
09
Meteorological Warning
Heavy rains in the Pacific this Monday
September 9, 2024
10:00 am
Diagnosis: Unstable conditions continue in the atmosphere around the country, due to the proximity of the Intertropical Convergence Zone and the high humidity content. This condition, together with local factors, will favor variable rain activity for this afternoon.
Forecast: For this afternoon and early evening, showers with strong thunderstorms are expected for the Pacific slope, particularly for the mountainous areas in the Central Pacific, around the border with Panama, around the Golfo Dulce in the South Pacific and around the Gulf of Nicoya, Tempisque Valley and mountain ranges in the North Pacific. Estimated amounts between 40-80 mm with possible higher amounts at certain times.
For the Central Valley, scattered showers with thunderstorms are expected mainly in the west and north, in the rest of the region, isolated showers are possible mainly in the highlands and their surroundings. Maximum amounts estimated between 20-60 mm.In the Northern Zone, isolated heavy showers with thunderstorms are expected, starting in the mountainous areas in the early afternoon and then moving towards the lower areas in the late afternoon and early evening. Estimated amounts are between 30-70 mm with possible higher amounts at certain times.
In the Caribbean regions, showers with thunderstorms are expected in mountainous areas and surrounding areas (10-30 mm), while the coastal areas will continue to be predominantly cloudy with the possibility of occasional rains of lesser intensity (1-10 mm), especially towards the nighttime period.Warning: Saturated soil conditions continue in the Central Valley, Pacific slope and mountainous areas of the Caribbean and the Northern Zone, due to heavy rains over the weekend. This situation indicates a significant risk of incidents due to sewer saturation, river flooding or landslides, so special caution is recommended.
Due to the above, the IMN recommends: • Caution 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
Roberto Vindas
Meteorologist
DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
5:50 p.m.
Forecast: Tropical Wave 4 is over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude, providing high...
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
11.10 am
Diagnosis: is located over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude,...
May
31
Aviso Meteorológico (Actualización)
Lluvias variables en el país este sábado y onda tropical #4 mañana domingo
31 de mayo de 2025
5 pm
Diagnóstico: Este fin de semana la Zona de Convergencia Intertropical se muestra activa nuevamente frente al Pacífico costarricense; lo cual ha ocasionado aguaceros en el Pacífico Sur y eventos...
May
31
Weather Warning
Variable rains in the country this Saturday and tropical wave #4 tomorrow Sunday
May 24, 2025
11.40 am
Forecast: This weekend, the Intertropical Convergence Zone (ITC) is active again off the Costa Rican Pacific, causing downpours in the South Pacific and intermittent rain events in the Central...
May
30
Weather Warning
Variable morning rains this Friday in the Caribbean regions
May 30, 2025
7:30 a.m.
Diagnosis: High humidity levels in southern Central America, combined with instability in the upper troposphere in the region, have favored variable rainfall in the Caribbean and parts of the...
May
29
Aviso Meteorológico
Lluvias variables este jueves
29 de mayo de 2025
11:00 am
Diagnóstico: Condiciones propicias para la ocurrencia de lluvias variables se presentan sobre el país este día. Esto debido a varios factores: inestabilidad en la atmósfera alta, la presencia de...
May
28
Weather Warning (Update)
Tropical Wave #3 over Costa Rica this Wednesday
May 25, 2025
6.15 pm
Forecast: Tropical Wave 3 is crossing Costa Rica this Wednesday, increasing instability in its wake. In recent hours, heavy downpours have been recorded on the Pacific coast. This is more...
May
28
Weather Warning
Tropical Wave #3 over Costa Rica this Wednesday
May 28, 2025
10:00 a.m.
Diagnosis: Tropical wave #3 will cross Costa Rica during the course of Wednesday, increasing the atmospheric instability over the country and reinforcing rainfall for this afternoon and evening. ...
May
27
Weather Warning
Tropical Wave 3 will move over Costa Rica this Wednesday
May 27, 2025
07.00 p.m.
Discussion: Tropical Wave 3 is moving over eastern Panama. This system will continue its westward movement, entering Costa Rica on Wednesday. This, along with local factors such as morning...
May
26
Weather Warning (Update)
Variable rainfall in recurring areas.
May 26, 2025
6:05 p.m.
Diagnosis: The Intertropical Convergence Zone is located over Costa Rica and Panama, bringing moisture from both sides. Along with the presence of trade winds in the central Caribbean Sea and...
