Weather warnings

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...

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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...

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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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Weather warnings history

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Aviso Meteorológico-IMN-030821-0450pm

Aug

03

Weather Warning

Heavy rains will continue in the early hours of the night in the Pacific

August 3, 2021
4.50 p.m.

Discussion: The passage of tropical wave # 21, as well as the proximity of the Intertropical Convergence Zone, warm morning temperatures and entry of sea breezes; have generated this afternoon strong rainy and electrical activity in the North Zone, Central Valley and Pacific, with accumulated maximums between 30-50 mm in the last 3 hours and close to 60 mm in La Fortuna de San Carlos.

Forecast: At the end of the evening period and during the first part of the night, rains of variable intensity and downpours with electrical storms will continue in the Pacific regions; being the strongest precipitation events in the central and southern part of the Nicoya Peninsula. Accumulated estimated between 30-60 mm, with possible higher amounts locally. In the Central Valley, isolated drizzles are possible in mountainous and surrounding areas, amounts less than 10 mm.

Scattered rains are expected in the Northern Zone and mountains of the Caribbean, accumulated between 10-40 mm.

Warning: Due to recent rains, high levels of soil saturation are maintained in the North Zone and the Cordillera de Talamanca (towards both slopes), they can generate a rapid increase in the flow of rivers and in unstable areas with a high propensity to landslides.

Due to the above, the IMN recommends:

  • Caution for sewer saturation and possible flash floods in the Pacific, Central Valley and North Zone.
  • Prevention against thunderstorms and seek shelter in a safe place in the event of strong gusts of wind occurring or perceived near the storm clouds, due to the possible fall of tree branches, power lines, among others.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr

Rebeca Morera R
Meteorologist
DMSA-IMN