Weather Warning

Variable intensity rains this afternoon and information on tropical wave number 29

September 2, 2024

9:35 a.m.

Diagnosis: The Intertropical Convergence Zone (ITCZ) is positioned close to the country. This system, together with local factors such as daytime warming and high humidity, favors unstable conditions in the atmosphere. During the early morning, coastal rains occurred in the surroundings of the Nicoya Peninsula and the northwest of the Central Pacific, with accumulations below 10 mm.

Forecast: During this afternoon, rains of variable intensity are expected with the possibility of thunderstorms, which may continue into the early hours of the night.

For the North Pacific, Central Pacific and South Pacific, rains of variable intensity are expected with thunderstorms that may generate strong punctual events. According to the analysis, these rains will be more significant during the afternoon period around the Gulf of Nicoya and in coastal areas of the Central Pacific. Cloudiness will begin in the mountains and will spread toward the coastal area, with the tendency to continue into the early hours of the night. The estimated amounts in 6-hour periods are between 20 mm and 50 mm, with maximum accumulations located between 50 mm and 80 mm.

For the Northern Zone, it is expected that in the plains the conditions will be more dispersed; however, in the mountains there may be strong localized events of precipitation and thunderstorms, with accumulations between 10 mm and 35 mm, and maximums located between 35 mm and 70 mm.

The probability of rain remains for most of the Central Valley; however, the most significant rains would occur towards the mountains, the west and the north of the region. Accumulations will be between 10 mm and 25 mm, with maximums located between 25 mm and 60 mm.

In the Caribbean, showers are possible in mountainous areas, on the Talamanca Mountain Range and in the Central Volcanic Mountain Range. Accumulations in these sectors are expected to be between 5 mm and 20 mm, with localized higher maximums.

Regarding tropical wave no. 29 (OT 29): Currently, OT 29 is located over the Lesser Antilles (61°W) and continues to move west/northwest. The United States National Hurricane Center indicates that there is a 40% probability that OT 29 will become a tropical depression in the next 7 days. If this happens, its influence is expected to be present indirectly between Thursday night and Friday. The National Meteorological Institute (IMN) maintains strict surveillance of tropical wave no. 29 in view of its possible development.

 

 

 

 

 

 

 

 

 

 

 

 

Warning: Due to the rains of the last 3 days, the soils remain saturated in sectors of the South Pacific, mountains of the South Caribbean, Nicoya Peninsula, mountains of the Northern Zone and in coastal sectors of the Central Pacific, which increases the vulnerability in these areas. In addition, the projected rains in urban areas may cause sewer saturation and flash flooding.

Due to the above, the IMN recommends:

• Caution due to sewer saturation in places prone to this type of flooding.
• Prevention against electrical storms and seek shelter in a safe place in case of occurrence or perception 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 media: Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr

Paulo Solano
Meteorologist
DMSA-IMN

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