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...

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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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Weather Warning-IMN-080623

Jun

08

Weather Warning -Update-

Tropical wave #6 crosses Costa Rica this Thursday

June 08, 2023.
6:00 pm

Diagnosis: This Thursday, tropical wave #6 crosses Costa Rica increasing the atmospheric instability that has left the rains of recent days. During today's afternoon there have been scattered downpours accompanied by electrical storms throughout the mountainous axis of the country, which are now maintained with the presence of variable rains in most of the country. The amounts registered so far in the Central Valley are around 10-40 mm with punctual maximums of up to 50-75 mm in the north of Heredia (Santa Barbara) and around Cartago. The other regions show values lower than 50 mm with the exception of the mountains of the North Zone with another maximum close to 70 mm.

Forecast: By the end of the afternoon and early hours of the night, weak and moderate rains will remain in the Central Valley with amounts of less than 25 mm, while to the west of the Caribbean regions there will be occasional downpours with amounts between 25 - 45mm with punctual maximums of 70mm, all this in periods of 6 hours. In the Central Pacific and the South Pacific, the rains will be concentrated along the coast until late at night. Rain amounts are expected between 40-70 mm with maximums of up to 85 mm in a localized manner. 6 hour periods

Warning: Special attention due to high soil saturation values due to rains in recent days in mountainous regions of the North Pacific, North Zone and the GAM in the Central Valley.

Due to the above, the IMN recommends:

• Caution for saturation of the sewerage in places prone to this type of flooding.

• Prevention before electrical storm and seek refuge in a safe place in case of appearing or perceiving strong gusts of wind near the storm clouds, due to the possible fall of tree branches, power lines, among others.

• Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr

Jose Valverde Mora

Meteorogist

DMSA-IMN