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 Meteorológico-IMN-011020-Actividad lluviosa y eléctrica fuerte en este día-Actualización-
Oct
01
Weather Warning
Strong rain and electric activity on this day -Update-
October 01, 2020
03:40 p.m.
Diagnosis: The Intertropical Convergence Zone remains very active and together with the morning warming and the entry of sea breezes have generated in the first part of this afternoon strong rainy and electrical activity in the North and South Pacific, to a lesser extent towards the Central Valley, causing accumulations of 30 mm in the last two hours and maximum of 60 mm in 6 hours.
Forecast: In the remainder of the afternoon, rains of variable intensity and downpours with electrical storms are expected in the Pacific regions (the strongest in the north and south), Central Valley and North Zone, amounts between 30-60 mm are estimated , larger accumulated are possible in a localized manner. On the other hand, isolated rains with storms are expected in the Caribbean mountains, estimated amounts between 20-40 mm.
During the first hours of the night the rains will continue, especially in coastal areas of the Pacific, amounts between 25-50 mm.
Warning: Special attention due to the high percentage of soil saturation in the Central and South Pacific, Nicoya Peninsula and North Zone.
Due to the above, the IMN recommends:
• Caution in areas vulnerable to flooding due to sewerage saturation.
• Take shelter in a safe place in case you hear an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling 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
