Weather warnings
Aviso Meteorológico-IMN-120724-Viento alisio acelerado y lluvias en el país este viernes
Jul
12
Meteorological Warning
Accelerated trade winds and rains in the country this Friday
July 12, 2024
10:20 am
Diagnosis: Unstable atmospheric conditions persist in southern Central America, due to the position of the Intertropical Convergence Zone and the drag of humidity from the Caribbean by the trade winds. This morning there has been variable cloudiness with scattered rain in the Caribbean and the Northern Zone, as well as in coastal areas of the South Pacific. The maximum amounts of precipitation recorded so far are between 5-20 mm.
Forecast: Variable weather conditions are projected for this Friday over the national territory. The trade wind will remain strong with occasional gusts in the Central Valley (35-45 km/h), Guanacaste (35-55 km/h) and in the mountain ranges of the country (60-70 km/h)
In the Caribbean and the Northern Zone, partly cloudy skies are expected in the morning with some intermittent rains of weak to moderate intensity. For the second half of the afternoon and the night period, an increase in cloud cover is expected, as well as an intensification of rains. Isolated heavy showers are expected, especially in mountainous areas and surrounding areas (places such as San Carlos, Sarapiquí, Pococí, Aguas Zarcas, Turrialba, among others) for this period. Maximum amounts between 40-70 mm with the possibility of values greater than 90 mm localized.For the Central Valley, the entry of cloudiness from the Caribbean maintains the probability of occasional rains in the north, central and east sectors, while in the west and south isolated showers are expected with the possibility of short-term storms. Maximum amounts estimated between 5-30 mm.
For the Central and South Pacific, there is a probability of scattered showers with thunderstorms mainly in the mountainous areas and surrounding areas, as well as in the vicinity of the border area with Panama (places such as Pérez Zeledón, Buenos Aires, San Marcos, San Vito, Laurel, among others). For the North Pacific, scattered rains are expected in the center and south of the Nicoya Peninsula and in the surrounding areas of the Guanacaste and Tilarán mountain ranges. Maximum amounts estimated between 25-50 mmWarning: Special attention should be paid to the Caribbean and Northern regions because the rains of the last few hours keep the soils with high levels of saturation and this increases the vulnerability of the area.
Due to the above, the IMN recommends: Caution due to sewer saturation in places prone to this type of flooding.
Prevention in the event of an electrical storm and seeking shelter in a safe place in the event of strong gusts of wind occurring or perceived near the 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 media: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr
Meteorologist
DMSA-IMNWeather warnings history
In this section you will find the weather warnings history.
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Jul
07
Weather Warning
Heavy downpours during the afternoon in the Pacific and northern regions
July 07th, 2025
10.40 a.m.
Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...
Jul
06
Aviso Meteorológico
Efectos de la onda tropical #13 en el país este domingo y lunes
06 de julio de 2025
11.25 am
Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...
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...
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...
Jun
25
Weather Warning -Update-
Variable Intensity Rainfall Expected This Night
June 25th, 2025
5.10 pm
Diagnosis: Following the passage of strong Tropical Wave #8 on Tuesday, this Wednesday is expected to bring a return to more typical rainy season conditions. Today's rainfall is mainly...
