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.
Aviso Meteorólogico IMN 230520
May
23
Weather Warning
Tropical Wave #1 over Central America this Saturday
May 23, 2020
10.30 a.m.
Diagnosis: This Saturday, tropical wave # 1 is crossing Central America, reinforcing in its path the atmospheric instability over Costa Rica generated by the Intertropical Convergence Zone. Due to the above, an afternoon and part of the rainy night are expected in much of the national territory.
Forecast: Moderate rains and showers with a thunderstorm are forecast for this afternoon in the Central Valley and mountainous sectors of the Northern Zone and the Caribbean. In addition, rains of variable intensity with electrical storms throughout the regions of the Pacific Slope, being the most intense around the Tempisque Valley (North Pacific) and the Coto Brus Valley (South Pacific).
In the hours of the night, the scattered rains in the national territory, but concentrating them in the mountainous sectors of the country.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewer saturation.
• Take refuge in a safe place in case of hearing an electrical storm or perceiving strong gusts of wind near the storm clouds, as well as precaution for 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
Juan Diego Naranjo Diaz
Meteorologist
DMSA-IMN
