Weather Warning

Intertropical Convergence Zone active over the country this Sunday

September 1, 2024

10:00 a.m.

Diagnosis: During Sunday, unstable and humid conditions will continue due to an active Intertropical Convergence Zone over our country, along with instability in the upper atmosphere. Since early in the morning, the presence of showers in maritime sectors of the Caribbean and the North Pacific has caused occasional rains on the Caribbean coastline and over the Nicoya Peninsula. Accumulations in the last 6 hours are between 5 - 40 mm, especially towards the western coasts of the North Pacific.

Forecast: During the morning, occasional rains will continue in the North and western parts of the North Pacific, in addition, cloudiness will continue to increase for the Pacific slope and Central Valley, due to the contributions of humidity from the westerly breezes.

In the afternoon, significant cloud developments throughout the central mountainous axis of the country will be the precursors of showers with thunderstorms. The most significant rainfall will be present in most of the Central Pacific and South Pacific, in the central-western part of the Central Valley and occasionally in the mountains of the western Caribbean. More scattered rainfall will occur in the mountains and low-lying parts of the Northern Zone, in the areas around the Gulf of Nicoya and south of the Nicoya Peninsula.

The most significant 24-hour accumulations are expected in the central-southern part of the country. These would be between 30 - 60 mm with maximums located between 80 - 120 mm (especially for the Central and South Pacific). For the east and north of the regions in question, the accumulations would be between 20 - 40 mm with maximums located up to 70 mm. The rainfall would continue into the early hours of the night towards the coasts of the Central and South Pacific, along the Gulf of Nicoya.

Warning: Today's rainfall is projected over urban areas, so the saturation of sewers could cause flash flooding. Saturated soils remain in the Northern Zone, mountains of the South Pacific, both Peninsulas and high areas along with sectors surrounding Puntarenas, increasing vulnerability in these areas.

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 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

Jose Valverde Mora

Meteorologist

DMSA-IMN

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