Weather warnings
Aviso Meteorológico Infomativo-IMN-021123-Disturbio con potencial ciclónico en el Mar Caribe se mantiene
Nov
02
Informative Meteorological Warning
Disturbance with cyclonic potential in the Caribbean Sea continues
November 2, 2023
11:00 am
Diagnosis: A low pressure system in the center of the Caribbean Sea has decreased its probability of developing into a tropical cyclone. Currently it has 20% at 48 hours and 20% at seven days. This disturbance is moving toward the western Caribbean Sea with disorganized storms and precipitation.
Forecast: Numerical models continue to show significant uncertainty, however, it is estimated that its trajectory will continue westward, approaching the coasts of Nicaragua and northern Costa Rica this weekend.
With this projection, a greater activation of the Intertropical Convergence Zone and also an induced flow of constant humidity from the Pacific Ocean towards the national territory would be generated, starting on Friday night. Given these conditions, a strengthening of rains is expected in the country for this weekend, with particular emphasis on the regions of the Central and South Pacific.
The IMN maintains strict uninterrupted surveillance and will immediately update information on the possible formation of this phenomenon and its possible effects in Costa Rica.
Warning: Special attention in the Pacific regions and mountainous areas of the country because they are the areas where the heaviest rains are expected.
Due to the above, the IMN recommends:
Be attentive to the issuance of informative weather warnings that are published in:
- Twitter: @IMNCR
- Facebook: National Meteorological Institute
- WEBSITE: www.imn.ac.cr
Next notice: tomorrow at 10:00 a.m.
Paulo Solano
Meteorologist
DMSA-IMN
Weather warnings history
In this section you will find the weather warnings history.
Jun
05
Weather Warning
Intertropical Convergence Zone over the country
June 5th, 2025
9:40 a.m.
Diagnosis: The Intertropical Convergence Zone is positioned over the country. This system, combined with high humidity, creates a favorable environment for rain and showers with thunderstorms...
Jun
04
Aviso Meteorológico (Actualización)
Lluvias y aguaceros con tormenta para esta tarde (actualización)
4 de junio de 2025
5:00 pm
Diagnóstico: Las altas temperaturas registradas esta mañana, junto al aumento progresivo de la humedad en el ambiente, están generando condiciones atmosféricas favorecieron la formación de...
Jun
04
Weather Warning
Rain and downpours with thunderstorms expected this afternoon
June 4th, 2025
9:55 a.m.
Diagnosis: The high temperatures recorded this morning, along with the progressive increase in humidity, are generating favorable atmospheric conditions for the formation of rain and showers with...
Jun
03
Weather Warning (Update)
Favorable conditions for heavy downpours this Tuesday
03 de junio de 2025
06.10 p.m.
Discussion: Favorable atmospheric conditions for heavy rainfall are being recorded across the country this Tuesday. The high humidity from the recent rains and the high temperatures experienced...
Jun
03
Weather Warning
Favorable conditions for heavy downpours on Tuesday
June 3th, 2025
10:00 a.m.
Forecast: Isolated showers with thunderstorms are expected along the Guanacaste and Central Volcanic mountain ranges, as well as the Central Pacific and South Pacific mountains, with estimated...
Jun
02
Aviso Meteorológico
Lluvias continuarán en las primeras horas de la noche
2 de junio de 2025
5:45 pm
Diagnóstico: Durante esta tarde, se han registrado fuertes aguaceros en gran parte territorio nacional, siendo el Valle Central la región con los mayores acumulados entre 40 mm y 50 mm, y los...
Jun
02
Weather Warning
Thunderstorms and showers this afternoon in the Pacific slope
June 02, 2025
10:30 a.m.
Forecast: High levels of available moisture, along with local factors such as sea breezes and rising temperatures in the early afternoon, will be the ingredients for afternoon rains this early...
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
5:50 p.m.
Forecast: Tropical Wave 4 is over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude, providing high...
Jun
01
Weather Warning (Update)
Tropical Wave #4
Jun 01, 2025
11.10 am
Diagnosis: is located over Costa Rica this Sunday. In addition to the transit of this disturbance, we remain within the Intertropical Convergence Zone over our latitude,...
May
31
Aviso Meteorológico (Actualización)
Lluvias variables en el país este sábado y onda tropical #4 mañana domingo
31 de mayo de 2025
5 pm
Diagnóstico: Este fin de semana la Zona de Convergencia Intertropical se muestra activa nuevamente frente al Pacífico costarricense; lo cual ha ocasionado aguaceros en el Pacífico Sur y eventos...
