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Aviso Meteorológico-IMN-150920-5.30pm

Sep

15

Weather Warning

Heavy rains by late afternoon in the South Pacific

September 15, 2020
5.30 pm

Diagnosis: As mentioned in the previous notice, the Intertropical Convergence Zone located over Costa Rica is providing atmospheric instability and humidity from both maritime sectors; that together with the evaporation that occurred this morning, have created ideal conditions for the heavy downpours this afternoon. The Central Valley has been the region with the highest accumulated rainfall, particularly in the GAM, with amounts between 40-60mm and maximums of 90mm in the surroundings of San José.

Forecast: For the first hours of the night, intense downpours with a thunderstorm are expected in the South Pacific, with amounts estimated between 30-40mm and maximums of 60-80mm in short periods of time and on a specific basis; part of these rains will reach the Central Pacific coast in the next 3 hours.

In the regions of the North Pacific and the North Zone, moderate intensity rains will continue in the following hours, mainly in the surroundings of the Cordillera de Guanacaste, with estimated amounts between 30-50 and maximums of 60-75mm at a point.

In the Central Valley, weak rains and banks of fog are expected at night.

Warning: Due to yesterday's rains, caution is recommended in places in the Cordillera de Guanacaste, Cordillera de Tilarán; as well as in the upper parts of the South Pacific.

Due to the above, the IMN recommends:

• Caution in areas vulnerable to flooding due to sewerage saturation.
• Take shelter in a safe place in case you hear an electrical storm or perceive strong gusts of wind near the storm clouds, as well as caution against possible falling tree branches, power lines, among others.
• Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: www.imn.ac.cr

Juan Diego Naranjo Diaz
Meteorologist
DMSA-IMN