Weather warnings
Jul
14
Aviso Meteorológico
Onda tropical #15 transitando este lunes por el país
14 de julio de 2025
10:00 AM
Diagnóstico: La onda tropical #15 ingresó al país durante la madrugada. Aunque es una onda débil, ha generado lluvias y tormentas en zonas marítimas del Pacífico Central, el Caribe y en áreas...
Jul
13
Aviso Meteorológico Informativo
Tropical Wave #15 transiting over Costa Rica early Monday morning
July 13h, 2025
6 p.m.
Diagnosis: During the course of early Monday morning, tropical wave #15 will be passing over the national territory. Although it is a weak tropical wave, it will be interacting with the...
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...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-130121-850am
Jan
13
Weather Warning
Strong winds persist this Wednesday in the country
January 13, 2021
8.50 am
Diagnosis: The characteristic transit of high pressure systems in the north of the Caribbean Sea during January raises the atmospheric pressure gradient in the Central American region, thus causing strong gusts to continue in the north and center of the country. There have been gusts this morning with values ??of 50-80 km / h in Guanacaste and 65 km / h in the Central Valley. On the other hand, humidity levels have decreased in the Caribbean and Northern Zone, making the cloud cover very scattered this morning.
Forecast: During the afternoon, the pattern of strong winds will persist in the center and north of the country with gusts between 25-65 km / h in the lower parts and between 55-75 km / h in the high areas. Wind intensity is expected to decrease overnight and remain moderate for the rest of the week.
As for cloudiness, this afternoon partially cloudy skies are anticipated with occasional rains in the Caribbean regions and the North Zone, especially in high areas, with a tendency to progressively decrease as night approaches, amounts between 5-30 mm in periods of 6 hours. In the rest of the country, skies with slight to partial clouds are expected, with scattered showers in the mountains of the South Pacific. Warning: Pay special attention to wind gusts in the North Pacific, the Central Valley and the mountain ranges.
Due to the above, the IMN recommends:
• Precaution in areas vulnerable to flooding due to saturation of sewers and / or flooding of rivers and streams, in the face of increased rainfall events in the Caribbean and the North Zone.
• Prevention of wind gusts and their possible impact on roofs, electrical wiring, signs, trees; as well as in the mountainous parts of the country and Guanacaste (national parks, volcanoes).
• Precaution in air navigation in the face of increased turbulence, as well as in the maritime sector due to increased rough seas, especially in the North Pacific, Gulf of Nicoya and north of the Central Pacific.
• 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
