Weather warnings
Jul
11
Weather Warning
Tropical wave #14 over Costa Rica this Friday
July 11th, 2025
9:50 a.m.
Diagnosis: The high humidity level across the country and the current instability are a result of Tropical Wave 14, which is positioned over the country this morning. Scattered showers have...
Jul
10
Weather Warning
Tropical Wave 14 to Pass Over Costa Rica This Friday
July 10, 2025
04.30 p.m.
Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...
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...
Weather warnings history
In this section you will find the weather warnings history.
Weather Warning-IMN-061124-9:10 a.m.
Nov
06
Weather Warning
Indirect influence of Hurricane Rafael in the north side of the country
November 06, 2024
09:10 a.m.
Diagnosis: This morning Hurricane Rafael is located 190 km south of Havana, Cuba, maintains sustained winds of 175 km/h and moves northwest at 22 km/h. The position of this system favors the incursion of moisture from the Pacific Ocean to the national territory and especially on the North Pacific. The foregoing has led to varyarines and variable rains for this region, with accumulated in the last 6 hours between 10 - 50 mm, with the highest amounts and up to 125 mm, registered towards the surroundings of Sardinal.
Forecast: In the remainder of the morning, variable cloudiness will prevail in regions of the Pacific of Costa Rica, they will also continue to present rains especially over the North Pacific. The estimated amounts would be between 10 - 60 mm. For the afternoon and night in Pacific regions, intensity variable rains are estimated, accumulated between 30 - 80 mm in periods of 6-12 hours, they are possible superior amounts locally, especially for the North Pacific and Mountains of the Central Pacific. For the Central Valley during this Wednesday, rains with downpours are provided for sectors of the East and North. These rainfall can begin near noon and extend during the evening period and first part of the night. They are possible fog banks. The estimated amounts of 12 -hour lapses would be varying between 15 - 60 mm.
On the other hand, in the North Zone and Mountains of the Caribbean, isolated but strong downpours are expected and accompanied by a storm, these in the afternoon and first part of the night. Accumulated estimated between 25 -50 with maximums located up to 80 mm in periods of 6 -12 hours.
According to the latest analyzes, today it would be the last day of indirect influence of the tropical cyclone Rafael, however, instability and humidity will be maintained in the region, so the probability of rains for the Pacific slope is high and increasing. This for these regions that are already vulnerable by the rains of recent days.
WARNING: Soil saturation with extremely high percentages are maintained in both peninsulas, the entire North Pacific, mountains of the South Pacific, North Zone, Central Pacific and Central Valley, which is recommended to extreme measures since they have high vulnerability of incidents.
Due to the above, IMN recommends:
• Caution due to sewerage saturation in places prone to this type of flood.
• Storm prevention and seek refuge in a safe site in case of presenting or strong gusts of wind near the storm clouds, due to the possible fall of tree branches, electric laying, among others. These bursts can reach 80 km/h in some isolated cases.
• Stay informed through social networks, Twitter: @imncr, Facebook: National Meteorological Institute CR and the website: www.imn.ac.cr
Jose Valverde Mora
Meteorologist
DMSA-IMN
