Weather warnings
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...
Jun
26
Weather Advisory
Variable intensity rainfall expected this afternoon, in the Pacific and North Zone
June 26th, 2025
9:50 a.m.
Diagnostic: Tropical Wave 9, located in the Pacific near the country, is still unstable in its surroundings. Along with the Intertropical Convergence Zone over southern Central America, it will...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorólogico IMN 200520
May
20
Weather Warning
Intense downpours in the north of the country
May 20, 2020
3.30 pm
Diagnosis: This Wednesday continues the high moisture content in the region, this factor combined with the high temperatures in the national territory; In addition to the atmospheric instability caused by the influence of the Intertropical Convergence Zone, it is promoting intense downpours with an electrical storm in the north and center of the country, the highest accumulated at this time are in Upala, with a record of 80 mm, thus same 55 mm in Cañas, 36 mm in La Garita and 30 mm in Iztarú.
Forecast: The intense rainy activity with a storm that occurs in the north of the country will continue throughout the afternoon, especially in the Northern Zone.
For this afternoon and early evening, showers of varying intensity and showers with thunderstorms are expected on the Pacific side. The most intense activity is expected for the areas in the vicinity of the mountainous parts, as well as in and around the Nicoya and Osa peninsulas.
On the other hand, in the Central Valley and the Caribbean, rains and showers with an electrical storm are expected. For its part, for the coastal parts of the Caribbean, occasional rains of moderate intensity are anticipated for the remainder of the day.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewerage saturation, increased flow in rivers and streams, as well as sectors prone to landslides.
• Prevention on national routes such as: route 1, route 10, route 27, route 21, route 32, route 34, route 141 and route 126.
• 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 via Twitter: @IMNCR, Facebook: CR National Meteorological Institute and the WEB Page: www.imn.ac.cr
Gabriela Chinchilla
Meteorologist
DMSA-IMN
