Weather warnings
Jul
10
Weather Warning
Tropical Wave 14 to Pass Over Costa Rica This Friday
July 10, 2025
04.30 p.m.
Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...
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...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-050820-0230pm
Aug
05
Weather Warning
Heavy rainy and electric activity this afternoon and evening
August 05, 2020
02.30 p.m.
Discussion: Several factors favor strong rainy and electrical activity in the country this afternoon, which are the proximity of the very active and positioned Intertropical Convergence Zone close to the national territory, the warm temperatures registered this morning and the entry of humidity from the maritime sectors. Accumulated between 15-40 mm are recorded in the last two hours, in the Central Valley, South Pacific and North regions.
Forecast: During the afternoon, heavy rains and heavy showers with thunderstorms will continue to appear in the Pacific, Central Valley and North Zone regions, accumulated estimates are estimated between 30-60 mm, possibly higher amounts in a timely manner. In the Caribbean isolated rains are expected in the mountainous and surrounding sectors with accumulated between 10-40 mm.
During the night moderate to heavy rains are expected, mainly in Pacific coastal areas, amounts between 25-50 mm. In the rest of the country intermittent rains are possible in the first part of the night period, accumulated 10-30 mm.
Warning: Special attention in the regions of the Central Pacific, Nicoya Peninsula and Central Valley where episodes of more intense rains are expected.
Due to the above, the IMN recommends:
- Caution in areas vulnerable to flooding due to sewer saturation.
- Take refuge in a safe place in case of listening to an electrical storm or perceiving strong gusts of wind near storm clouds, as well as caution for possible falling tree branches, power lines, among others.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr
Rebeca Morera R
Meteorologist
DMSA-IMN
