Weather warnings
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...
Jun
25
Weather Advisory
Variable Intensity Rainfall Expected This Afternoon
June 25, 2025
10:00 am
Diagnosis: Following the passage of strong Tropical Wave #8 on Tuesday, conditions are expected to return to a more typical rainy season pattern this Wednesday. Today's rainfall will be mainly...
Jun
24
Weather Warning -Update-
Tropical wave #8 over Costa Rica
June 24th, 2025
04:50 p.m.
Diagnosis: The instability of Tropical Wave 8 has manifested itself with scattered heavy rains and downpours in various locations in the central and Pacific regions of the country. Rainfall with...
Jun
24
Weather Warning
Tropical wave #8 over Costa Rica
June 24th, 2025
10:15 a.m.
Diagnosis: The axis of Tropical Wave #8 entered the country in the early hours of Tuesday. This system has caused cloud incursions toward the northern Caribbean border regions with Nicaragua....
Jun
23
Aviso Meteorológico
Condiciones lluviosas fuertes este lunes en el país y tren de ondas para la semana
23 de junio de 2025
09.45 a.m.
Diagnóstico: Luego del paso de la onda tropical #7 por nuestro país este domingo, la Zona de Convergencia Intertropical se encuentra robusta y bien organizada sobre el sur de Centroamérica. Esta...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico-IMN-050920-10.30 am
Sep
05
Weather Warning
Tropical wave # 34 crossing Costa Rica this Saturday
Sept 5, 2020
10.30 am
Diagnosis: This Saturday the Intertropical Convergence Zone is close to the country and, together with the passage of tropical wave # 34, will be generating strong rainy activity during this afternoon and early evening.
Forecast: During this day, the most intense rains will be concentrated in the Pacific Slope (mainly North Pacific) and North Zone; Amounts for this day are estimated between 30-40mm and maximum 75-90mm.
In the Central Valley, amounts of 30-40mm and maximums of 50-60mm are estimated. On the other hand, in the Caribbean regions, the rains will be concentrated in the mountains, with maximum amounts 20-30mm
Warning: Be very careful for the Central Valley due to adverse driving conditions; also in the mountains of both the North Zone and the North Pacific and the South Pacific due to possible small landslides. As well as ravine flood prone areas in the South Pacific and the Nicoya Peninsula.
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
Juan Diego Naranjo Diaz
Meteorologist
DMSA-IMN
