Weather warnings

« Back

Aviso Meteorológico-IMN-250923-0525pm

Sep

25

Weather Warning

Tropical Wave #40 enters the country

September 25, 2023.
5.25 p.m.

Discussion: Tropical Wave #40 enters the national territory, which, together with local factors and the proximity of the Intertropical Convergence Zone, will maintain an ideal environment for afternoon rainfall to extend into the night period. During this afternoon, showers and thunderstorms have been recorded in the Central Valley, the North Zone and the North Pacific, the maximum accumulated values are between 30-50 mm in the last 4 hours.

Forecast: Towards the end of the afternoon and during the night, isolated rains and downpours with thunderstorms will continue in the Central Valley, the North Zone and the North Pacific, amounts between 30-60 mm. For the Central and South Pacific, scattered moderate rains and thunderstorms are estimated in these periods, amounts between 25-50 mm.

For its part, in the mountainous parts of the Caribbean, isolated rains are expected, accumulated between 10-40 mm. Towards late hours of the night, rain is possible in coastal areas of the Caribbean

Warning: Special attention in the Central and South Pacific regions because they are the sectors where the heaviest rains are expected.

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 between 80 to 100km/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

Rebeca Morera R
Meteorologist
DMSA-IMN



Weather warnings history

In this section you will find the weather warnings history.

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...

See More


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,...

See More


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...

See More


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...

See More


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...

See More


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...

See More


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...

See More


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...

See More


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....

See More


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...

See More


Showing 1 - 10 of 2,006 results.
Items per Page 10
of 201