Weather warnings
Jul
01
Weather Warning
Rainy conditions in the Caribbean and Northern Zone this Tuesday and Tropical Wave #12
Jul 01th, 2025
10 am
Diagnosis The strengthening of the trade winds over the central and northern regions of the country has produced wind gusts of up to 50 km/h in areas such as Alajuela this morning. This...
Jun
28
Weather Warning
Tropical Wave #10 over Costa Rica
June 28th, 2025
10:30 a.m.
Diagnosis: Tropical wave #10 is over the country this Saturday, causing instability in maritime areas of the Caribbean and northern parts of the Northern Zone. There has been increasing...
Jun
27
Weather Warning -Update-
Rainy Afternoon in Costa Rica
June 27th, 2025
05.40 p.m.
Forecast: After the passage of Tropical Wave 9 yesterday, Thursday, the atmosphere remains unstable over the country. Along with warm morning temperatures and high humidity from recent rains,...
Jun
27
Weather Warning
Tarde lluviosa en Costa Rica
June 27th, 2025
10:00 am
Diagnosis: After the passage of tropical wave #9 on Thursday, the atmosphere continues to be unstable over the country, which, together with the warm temperatures of this morning and the high...
Jun
26
Weather Warning | Update
Rainfall activity of varying intensity this afternoon in the Pacific and Northern Zone
June 26, 2025
5:00 p.m.
Diagnostic: The passage of Tropical Wave #9, in combination with the Intertropical Convergence Zone, maintains atmospheric instability over the country. This has generated rain showers and...
Weather warnings history
In this section you will find the weather warnings history.
Weather Warning-IMN-181123-5:00 p.m.
Nov
18
Weather Warning (Update)
Variable rains this afternoon and evening in South and Central Pacific regions
November 18, 2023
5.00 p.m.
Diagnosis: The Intertropical Convergence Zone over Costa Rica maintains instability in maritime areas surrounding both slopes. This factor has generated cloudy conditions with variable rains for both the Central Valley and the Pacific regions and mountains of the Caribbean and Northern Zone.
Specifically, they have accumulated so far for: the Central Valley between 15 - 35 mm, for the North Pacific of 15 - 25 mm with a specific maximum in the Nicoya Peninsula of 55 mm, Central and South Pacific between 20 - 40 mm with maximums 50 mm. On the other hand, the Northern Zone and Caribbean regions only report locally on the surrounding sectors of Upala (90 mm) and Siquirres (50 mm).
Forecast: For the afternoon and evening hours, precipitation is expected to continue, with scattered rains and downpours, mainly in sectors of the Central-South Pacific and mountains of the western Caribbean (mountainous parts and surrounding low sectors). The estimated amounts in 24-hour periods will be between 25 - 50 mm with very specific maximums between 60 - 90 mm.
The Northern Zone will have localized downpours with thunderstorms, with accumulated amounts between 15 - 45 mm and specific maximums of 70 mm.
The Central Valley will tend to present scattered rains that will decrease at night, with amounts less than 30 mm. It will remain cloudy and fog banks during the night.
Warning: Soil saturation persists in the South Pacific, mountainous Central Pacific, Osa Peninsula, Northern Zone and mountainous Northern Caribbean.
Due to the above, the IMN recommends:
• Caution due to sewage saturation and possible flash floods, as well as the main routes of the country in the event of heavy rain events.
• Prevention against electrical storms and seeking shelter in a safe place in case strong gusts of wind occur or are perceived near 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
Meteorologist
DMSA-IMN
