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-150224-1000am
Feb
15
Weather Warning
Strong winds continue this Thursday
February 15, 2024
10:00 a.m.
Diagnosis: The presence of a high pressure system in the west of the Atlantic Ocean generates high atmospheric pressure in the Caribbean Sea, keeping trade winds accelerated for the country during this Thursday, registering gusts between 40 km/h and 60 km/h in the Central Valley; and between 60 km/h and 80 km/h in the North Pacific, approaching 100 km/h in La Cruz de Guanacaste.
Forecast: The windy pattern and strong to very strong gusts will continue during this Thursday and part of Friday, with the highest intensities in the center and north of the country. Strong gusts (40-60 km/h) are expected for the Central Valley and low sectors of Guanacaste, as well as very strong gusts (70-90 km/h) for the north of Guanacaste and mountains. These conditions are expected to remain until early Friday morning. During the period from Friday to Saturday, a gradual reduction of the wind is expected.
Due to the wind, the entrance of clouds from the maritime sector to the regions of both the Northern Zone and the Caribbean, will leave occasional rains, mainly near the mountains. The amounts should not exceed 15 mm in 12-hour periods. In the Central Valley, drizzle will occur in the mountains to the north of the region.
Warning: Special attention for very strong wind gusts in the North Pacific and Central Valley.
Due to the above, the IMN recommends:
- Prevention due to wind gusts and their possible affectation of roofs, electrical wiring, signs, trees; as well as in the mountainous parts of the country and Guanacaste (national parks, volcanoes).
- Caution in air navigation due to the increase of turbulence, as well as in maritime navigation due to the increase of rough seas, especially in the North Pacific, Gulf of Nicoya and north of the Central Pacific.
- Avoid fires of any kind, as they may get out of control.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and WEB Page: www.imn.ac.cr
Juan Diego Naranjo Díaz
Meteorologist
DMSA-IMN
