Weather warnings

May

09

Aviso Meteorológico

Heavy downpours with thunderstorms this afternoon on the Pacific side

May 9, 2025
10:00 am

Diagnostic: The Intertropical Convergence Zone remains positioned near our country. Additionally, local factors such as high temperatures and the entry of sea breezes contribute to favorable...

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May

08

Meteorological Warning Update

(Update) Showers and thunderstorms during the afternoon and early morningmeras horas de la noche

May 8, 2025
6:00 pm

Forecast: Rainy conditions have been observed this afternoon on the Pacific coast, much of the Central Valley, and mountainous areas of the Caribbean and the Northern Zone, due to the activity of...

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May

08

Weather Warning

Showers and thunderstorms during the afternoon and early evening

May 08, 2025
10.30 a.m.

Discussion: The Intertropical Convergence Zone remains located over Costa Rica, generating significant moisture and instability. This, along with morning warming and the arrival of sea breezes,...

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May

07

Aviso Meteorológico Actualización

(Actualización) Lluvias y aguaceros fuertes en el Valle Central y la vertiente del Pacífico

7 de mayo de 2025
6:20 pm

Diagnóstico: La Zona de Convergencia Intertropical sobre el país, en conjunto con factores locales como el calentamiento diurno y el ingreso de humedad desde el Océano Pacífico, favorecerá...

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May

07

Weather Warning

Heavy rain and downpours in the Central Valley and the Pacific slope

May 7, 2025
09:35 a.m.

Diagnosis: The Intertropical Convergence Zone (ITCZ), combined with local factors such as daytime warming and the entry of moisture from the Pacific Ocean, will favor variable rainfall throughout...

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Weather warnings history

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Aviso Meteorológico-IMN-180820-0300pm

Aug

18

Weather Warning

Downpours and thunderstorm in the Central and South Pacific

August 18, 2020
03.00 p.m.

Discussion: In the early hours of the afternoon there have been rains and downpours with an isolated electrical storm, mainly in the regions of the Central and South Pacific; This situation has been favored by the proximity of the Intertropical Convergence Zone, the warm morning temperatures and the entry of sea breezes. The accumulated precipitation in the last 3 hours oscillate between 10-25 mm.

Forecast: During this afternoon, rains of variable intensity and isolated showers with thunderstorms will continue to be witnessed in the Central and South Pacific regions, as well as in the Nicoya Peninsula, with amounts between 25-50 mm, possibly accumulated higher than located. In the North Zone (Upala and surrounding areas), the Central Valley (western and central sector) and the Caribbean mountains, rains and isolated showers with storm are expected, amounts estimated between 10-45 mm.

It is estimated that the precipitations extend to the first hours of the night in the Pacific and to a lesser extent in the Central Valley and North Zone, accumulated between 10-30 mm.

Warning: High levels of soil saturation prevail in the North and South Pacific Zone; therefore, particular attention is recommended.

Due to the above, the IMN recommends:

  • Caution in areas vulnerable to flooding due to sewer saturation.
  • Take shelter in a safe place in case of hearing an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling tree branches, power lines, among others.
  • 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