Informe Meteorológico N°19

Stormy conditions persist in the Pacific this Wednesday and there may be an indirect influence of disturbances in the Caribbean Sea starting Thursday

November 13, 2024

10.00 am

Diagnosis: Low-level atmospheric systems (Intertropical Convergence Zone and Tropical Wave #46) that are close to our country continue to show great organization this morning. Satellite images and weather stations reflect constant rain and downpours in the South Pacific during the last 33 hours. In addition, this Wednesday morning the downpours have extended to the Central Pacific and North Pacific. Cloud accumulation with light to moderate rain has also been observed throughout the mountain ranges and mountains of the country in general.

In the last 12 hours, the following amounts have been recorded: South Pacific, 80 mm in Ciudad Neily, 70 mm in Puerto Jimenez and 40 mm in Río Claro. Central Pacific, 67 mm in Esterillos Oeste, 35 mm in Parrita. North Pacific, 34 mm in Orotina, 26 mm in Hojancha, 22 mm in Esparza and 17 mm in Taboga.The rest of the country with very light rains.

Forecast: During this morning, convection nuclei (abundant cloudiness that causes rain and showers) will continue to develop on the Pacific slope, especially in coastal areas of the Central Pacific, the peninsula and the Gulf of Nicoya, the Tempisque Valley, the Tilarán and Guanacaste mountain ranges and in the South Pacific, such as the border area with Panama, Golfito, Puerto Jimenez, the Talamanca mountain range and the General Valley. In the west of the Central Valley, mountains in the Northern Zone and high areas of the South Caribbean, there will be intermittent rains during this period.

During the afternoon, showers will continue on the Pacific slope. In the Central Valley we will have intermittent rains. For the Northern Zone and mountains/plains of the Caribbean, localized showers are possible.

The estimated accumulations by region in a period of 6 to 12 hours are detailed below:

• North Pacific (particularly Peninsula/Gulf of Nicoya and Tilarán mountain ranges): ranges between 40 mm and 70 mm, with maximums of 100 mm.

• Central Pacific: ranges between 50 mm and 100 mm, with maximums of 125 mm.

• South Pacific: ranges between 40 mm and 100 mm, with maximums of 125 mm. • Central Valley: ranges between 5 mm and 30 mm, with maximums between 40 mm.

• North and South Caribbean: ranges between 15 mm and 50 mm, with maximums of 60 mm.

• Northern Zone: ranges between 5 mm and 40 mm, with a maximum of 60.

It should be noted that higher amounts are not ruled out in a localized manner in each respective region.

⚠ Attention: The rainy pattern will increase from Thursday to Sunday. The IMN continues to monitor tropical wave #46, which has a high potential (90% in two days and 90% in seven days) to evolve into a tropical cyclone over the central/western Caribbean Sea as it heads toward the Gulf of Honduras. The latest analyses show an indirect effect of this disturbance on the Pacific side of Costa Rica in the indicated period.

Warning: High soil saturation remains in much of the country, with saturation levels between 85% and 100%. Therefore, there is a high probability of flooding in vulnerable areas, mainly in the Pacific regions, and landslides in the mountains of the west and east of the Central Valley, the Northern Zone and the Tilarán Mountain Range, and the Caribbean.

Due to the above, the IMN recommends:

• Pay attention to the overflow of streams and rivers with high flows.

• Be alert in places prone to landslides.

• Prevention during thunderstorms and seek shelter in a safe place in case of strong gusts of wind 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: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr

Next report: Wednesday, November 13 at 6 p.m.

MSc.Gabriela Chinchilla Ramírez

Meteorologist

DMSA-IMN