Weather warnings

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...

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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...

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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...

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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...

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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...

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Weather warnings history

In this section you will find the weather warnings history.

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Aviso Meteorológico-IMN-260724-Actividad lluviosa variable para esta tarde y noche en el país (actualización)

Jul

26

Weather Warning (Update)

Variable rain activity for this afternoon and evening in the country

July 26, 2024
3:35 p.m.

Diagnosis: Unstable atmospheric conditions caused by the proximity of the Intertropical Convergence Zone, high humidity content and local factors have generated rainfall this afternoon in several areas of the country. The most significant amounts are in the mountainous surroundings of San Ramón (70 mm), Buenos Aires (50 mm), Hojancha (40 mm) and Bribrí (35 mm).

Forecast: During the rest of the afternoon and during the night, these conditions are expected to continue, favoring the occurrence of rains of varying intensity accompanied by storms.

In the Nicoya Peninsula, Central Pacific and South Pacific, showers with thunderstorms are expected with estimated accumulations between 20 mm and 50 mm, with maximums between 50 mm and 80 mm in periods of 6-12 hours.

In the Central Valley and mountains of the Caribbean, rains of varying intensity are expected during the rest of the afternoon, with a tendency to decrease in the early hours of the night. The estimated accumulated rainfall is between 10 mm and 30 mm, with maximum accumulated rainfall between 30 mm and 50 mm in periods of 6-12 hours.

In the North Zone, heavy localized downpours may occur, mainly in mountainous areas and surrounding areas. The estimated accumulated rainfall is between 30 mm and 50 mm, with maximum accumulated rainfall between 50 mm and 70 mm in periods of 6-12 hours.

In addition, the passage of tropical wave number 21 is anticipated during next Saturday. This system may reinforce rainfall in the country during the afternoon and night.

Warning: Mountains in the North Zone and North Caribbean are prone to landslides due to high soil saturation and possible river overflows at the foot of the mountains. Likewise, on the Pacific side, attention should be paid in both peninsulas due to high levels of saturation. Special attention should also be paid in urban areas due to the possibility of flooding due to saturated sewers.

Due to the above, the IMN recommends:

• Caution due to sewer saturation in places prone to this type of flooding.
• Prevention against electrical storms and seek shelter in a safe place in case of strong gusts of wind near storm clouds, due to the possible fall of tree branches, power lines, among others. These gusts can reach 80 km/h in some isolated cases.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr

Paulo Solano
Meteorologist
DMSA-IMN