Weather Warning

Heavy rain on the Pacific slope

May 09, 2024

9:30 a.m.

Diagnosis: The atmospheric instability in our region is associated with the position of the Intertropical Convergence Zone, especially over Costa Rica. This favors the occurrence of heavy rainfall, especially during the afternoon and early evening in sectors of the Pacific slope. During the early hours of the day there has been no significant rainfall.

Forecast: During the morning the entry of humidity will be accentuated and, therefore, the development of cloudiness on both slopes. Starting in the afternoon period, the presence of heavy downpours accompanied by thunderstorms is forecast, being more significant for the North Pacific (especially around the Gulf of Nicoya and mountains to the southeast) and the Central Pacific; These will develop first in mountains and later towards coastal sectors. The amounts accumulated in 12 hours will be between 45 - 65 mm with specific maximums between 65 - 105 mm.
In the case of the Central Valley and towards the central and mountainous west of the Northern Zone and Caribbean regions, occasional showers and downpours with localized storms are estimated. The estimated accumulated amounts will be between 15 - 30 mm with localized maximums of up to 60 mm. The South Pacific will present scattered showers and storms with amounts similar to the Caribbean and Northern Zone.

It is estimated that, for the beginning of the night, isolated downpours will continue around both gulfs, along the coasts of the Central Pacific.

Warning: Attention in sectors of the North Pacific (around the Gulf of Nicoya and the mountainous southeast), Central Pacific and South Pacific due to humid soils both in low parts and especially in mountainous areas. 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

Paulo Solano
Meteorologist
DMSA-IMN

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Weather Warning

Rain of varying intensity this afternoon and evening

April 28, 2024

10.30 a.m.

Discussion: The entry of tropical wave #1 is favoring an even more unstable and humid environment over our country, the above has generated cloud cover from the early hours of the day, in addition, scattered rains were recorded in the Caribbean, with amounts less than 5 mm.

Forecast: For the remainder of the morning, variable cloudiness between partial and total will remain in the national territory, light rains are possible in mountainous sectors of the Caribbean and the North Zone, accumulated between 5-15 mm.

During the afternoon and early hours of the night, cloudy developments and downpours with electrical storms are expected in the Central and South Pacific, also in the Nicoya Peninsula, accumulated between 30-60 mm, with possible higher amounts locally, in periods of 12 hours. . In the Central Valley and mountains of the Northern Zone, isolated rains and downpours with possible scattered storms are expected, amounts between 15-40 mm in periods of 12 hours.

The effects of the tropical wave will be experienced on Sunday, towards Monday this system will be outside the country and therefore its influence will no longer be perceived.

Warning: Special attention to strong precipitation events in regions of the Central and South Pacific, as well as in vulnerable areas on Route 32 and 27, among others.

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

Rebeca Morera R.
Meteorologist
DMSA-IMN

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