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Aviso Meteorológico -IMN-250922-1100 am



Weather Warning

TTropical Storm Ian and its indirect influence on the country this Sunday and Monday

September 25, 2022
11.00 a.m.

Diagnosis: This Sunday, Tropical Storm Ian is located about 700 km northeast (NE) of Puerto Limon and is heading towards the Gulf of Mexico at a speed of 25 km/h, with maximum sustained winds of 85 km/h. Due to its position and trajectory, Ian would have an indirect influence over the national territory, modulating the weather on Sunday afternoon and Monday.

Forecast: The presence of Ian in the Caribbean will cause the Intertropical Convergence Zone to be located over Costa Rica, with a strengthening of rainfall expected in the next 36 hours.

In the Pacific slope, constant precipitation of varying intensity is expected from this afternoon and during the night, mainly in the Central Pacific and South Pacific coast, with estimated amounts between 50 mm - 100 mm and maximums of up to 150 mm and 170 mm in 24-hour periods on both days. In the Central Valley, the highest amounts will be concentrated in the mountains both in the north of the region and in the hills south of San José and north of Cartago; with estimated amounts between 25 mm - 50 mm and maximum amounts of 75 mm.

In the rest of the country, isolated showers with thunderstorms with accumulated amounts between 20 mm - 40 mm.

Warning: Caution in the coastal/mountainous regions of the Pacific slope and mountainous sectors of the Central Valley as well as the Northern Zone and the Caribbean, since these regions present high saturation levels due to the rainfall of the last few days.

Due to the above, the IMN recommends:

  • Caution for sewer saturation and possible flash floods, as well as the main routes of the country before heavy rainfall events.
  • Prevention before thunderstorms and seek shelter in a safe place in case of strong gusts of wind near the storm clouds, due to the possible fall of tree branches, power lines, among others.
  • Be alert in areas prone to landslides in the mountainous sectors of the Central Valley.
  • Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page:

Juan Diego Naranjo Díaz