Weather warnings
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Jul
07
Weather Warning
Heavy downpours during the afternoon in the Pacific and northern regions
July 07th, 2025
10.40 a.m.
Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...
Jul
06
Aviso Meteorológico
Efectos de la onda tropical #13 en el país este domingo y lunes
06 de julio de 2025
11.25 am
Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...
Jul
01
Weather Warning
Rainy conditions in the Caribbean and Northern Zone this Tuesday and Tropical Wave #12
Jul 01th, 2025
10 am
Diagnosis The strengthening of the trade winds over the central and northern regions of the country has produced wind gusts of up to 50 km/h in areas such as Alajuela this morning. This...
Jun
28
Weather Warning
Tropical Wave #10 over Costa Rica
June 28th, 2025
10:30 a.m.
Diagnosis: Tropical wave #10 is over the country this Saturday, causing instability in maritime areas of the Caribbean and northern parts of the Northern Zone. There has been increasing...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-161020-1.00 pm
Oct
16
Weather Warning
Isolated but heavy downpours this afternoon
October 16, 2020
1.00 pm
Diagnosis: Local conditions and the proximity of the Intertropical Convergence Zone, generates favorable conditions for strong, but isolated rains in the country this afternoon.
Forecast: During the afternoon and early evening, the Pacific regions, Central Valley, mountains of the North Zone and mountainous parts of the Caribbean have a high probability of isolated showers with electrical storms, which could be strong in a localized way.
Rainfall amounts between 10-60 mm will occur in the Central Valley, Central Pacific and South, as well as the Nicoya Peninsula and amounts between 10-75 mm and in the North Zone and mountains of the Caribbean.
Warning: Special attention due to the high percentage of saturation of soils in the South Pacific (General Valley), Nicoya Peninsula and North Zone (Sarapiquí sector). As well as west of the Central Valley.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewerage saturation.
• Take shelter in a safe place in case you hear 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
Gabriela chinchilla
Meteorologist
DMSA-IMN
