Weather warnings
Jul
11
Weather Warning
Tropical wave #14 over Costa Rica this Friday
July 11th, 2025
9:50 a.m.
Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...
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...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-230620-1030am
Jun
23
Weather Warning
Tropical Wave # 11 will cross the country this Tuesday
June 23, 2020
10.30 a.m.
Diagnosis: Tropical wave # 11 located over Panama this morning, moves rapidly through that country, anticipating that it will enter the national territory in the late afternoon and early evening. Moving this wave amid the dust of the Sahara will cause rainfall to be isolated, but it can be intense.
Forecast: With the passage of this new wave, it is forecast that the rains that will occur this Tuesday during the afternoon will extend to night hours, mainly on the Pacific coast and the North Caribbean coast; with isolated showers between 30-40mm and maximums of up to 60mm in these places.
On the other hand, in the Central Valley and the North Zone, the rains will be dispersed with intensity varying from weak to moderate and estimated amounts between 5-10mm with maximums of 20mm during the afternoon and early hours of the night, in addition to fog banks in the surroundings of the GAM at night.
Warning: Special attention in the regions of both the Central and South Pacific in the afternoon, and the North Caribbean at night.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewerage saturation.
• Take refuge in a safe place in case of hearing an electrical storm or perceiving strong gusts of wind near storm clouds, as well as precaution for possible fall of tree branches, power lines, among others.
• Attention on the main national highways, such as route 27 and route 32.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB page: www.imn.ac.cr
Juan Diego Naranjo Díaz
Meteorologist
DMSA-IMN
