Weather warnings
Jul
15
Informative Weather Advisory
Saharan Dust and Strong Wind Gusts Affecting Several Regions
July 15, 2025
9:00 am
A dry air mass accompanied by Saharan dust is positioned over the Caribbean Sea and Central America. Additionally, a marked atmospheric pressure gradient is accelerating the trade winds...
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...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-070120-Sistema de alta presión afectando Centroamérica
Jan
07
Aviso Meteorológico
High pressure system affecting Central America
january 7, 2019.
10:00 am
Diagnosis: A high pressure system located in the vicinity of Florida, maintains high levels of atmospheric pressure on the Central American region which generates windy conditions on the country. So far this Tuesday there have been gusts between 40-55 km / h in the Central Valley and lower parts of Guanacaste and between 60-80 km / h in the mountainous areas. In addition, during this morning and tomorrow there were some drizzles in the North Zone and North Caribbean with amounts less than 5 mm.
Forecast: Throughout this day the windy conditions will continue with gusts in Guanacaste, Central Valley and mountain ranges of the country. For the central valley and the Guanacaste area, maximum gusts are anticipated between 40-60 km / h. In the mountainous parts the gusts are forecast between 60-85 km / h
As for rainfall, occasional drizzles are possible in this afternoon in the mountainous parts of the country with amounts between 1-5 mm, while during this night and early morning, isolated rains are expected in the North Zone and North Caribbean with estimated amounts between 20-60 mm. Possible higher amounts can be given locally.The high pressure system is projected to move through the Atlantic Ocean in the coming days, maintaining its influence on the region for the remainder of this week. Due to this, the windy pattern will remain at least until next Sunday, being the most affected days this Wednesday and Thursday with gusts that can reach between 60-80 km / h in the Central Valley and Guanacaste and between 90- 110 km / h in the mountainous parts of the country.
- Due to the above, the IMN recommends:
- Extreme precautions due to strong winds and their possible impact on roofs, electrical wiring, signs, trees; as well as in the mountainous parts of the country (national parks, volcanoes).
- Caution in areas vulnerable to flooding due to sewer saturation, increased flow in rivers and streams, and in areas prone to landslides.
- Caution for boats by choppy sea and very strong waves in the North Pacific, Gulf of Nicoya, Central Pacific and the Caribbean Sea, as well as air navigation due to turbulence over the mountainous sectors.
- Avoid burning of all kinds as they can get out of control.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute and the Website: www.imn.ac.cr
Roberto Vindas
MeteorologistDMSA-IMN
