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-210524-0910 a.m.
May
21
Weather Warning
Rainy activity this Tuesday in the country
May 21, 2024
9.20 am
Diagnosis: Tropical wave #3 at this time is located between the Pacific Ocean and Guanacaste, moving westward, leaving extensive instability in the Intertropical Convergence Zone, which in turn remains very active between Costa Rica and Panama.
Forecast: This morning there will be rains of varying intensity in the Caribbean and Northern Zone, as well as in the Central Volcanic Mountains and east/north of the GAM. The estimated accumulations for these regions will be between 5 – 30 mm with local maximums of 40 mm.
This afternoon, the presence of heavy rains/downpours with storms is forecast over the Central and South Pacific, Central Valley, North Pacific, mountainous sectors of the Northern Zone and surrounding areas. The accumulated amounts for these regions will be between 40 - 70 mm with maximums between 70 - 100 mm; larger amounts are not ruled out from time to time.
At night we expect strong rainy activity to still remain on the coasts and adjacent maritime sector of the Pacific, from the south of Nicoya to Osa. The estimated accumulations for these regions will be between 10 – 40 mm with local maximums of 50 mm.
Warning: Attention in the Talamanca sector, General Valley, South Pacific border and the mountains of the Northern Caribbean, Northern Zone in the Sarapiquí sector, central sector of the Nicoya peninsula and Central Valley in general, this due to humid soils. Be attentive to the development of storm clouds which present their own and significant characteristics such as descending gusts, high precipitation intensity in short periods of time and electrical discharges.
Due to the above, the IMN recommends: • Caution due to sewage saturation in places prone to this type of flooding. • 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. These gusts can reach 80 km/h in some isolated cases. • Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr
Gabriela Chinchilla R.
DMSA-IMN