Weather warnings

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...

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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,...

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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...

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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...

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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...

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Weather warnings history

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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