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...

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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...

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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...

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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...

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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...

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Aviso Meteorológico-IMN-150120-0730am

Jan

15

Aviso Meteorológico

Strong winds persist on this day

January 15, 2020
07.30 a.m.

Discussion: Strong windy conditions prevail on this day over the country, a situation generated by a high-pressure system in the Atlantic Ocean which maintains high atmospheric pressure levels over the Central American region. The most intense gusts are perceived in the north of Guanacaste with maximums of 108 km/h, meanwhile in the lower parts of the North Pacific and Central Valley they are around 50-85 km/h. In addition, weak rains appear in the North Zone and the Caribbean with amounts less than 15 mm.

Forecast: The strong winds will continue during this day, maximum speeds are estimated between 50-110 km/h in the mountain ranges of the country, while in the lower parts of the Central Valley and the North Pacific maximum between 40-85 km/h. A slight decrease in the intensity and frequency of the gusts is expected between Thursday and Friday.

As for rainfall, they will manifest themselves intermittently during the course of Wednesday in the Caribbean and North Zone regions with accumulated between 10-50 mm. Occasional light showers and light rains are possible in the mountain ranges and its surroundings with amounts less than 5 mm.

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 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

Rebeca Morera R
Meteorologist
DMSA-IMN