Weather Warning

Tropical Wave #31 to cross Costa Rica this Friday

September 12, 2024

12 m.

Diagnosis: Tropical wave #31 is over Panama this Thursday and will transit early Friday morning through Costa Rica, increasing atmospheric instability over the country and therefore, forecasts will be reinforced this Friday.

Forecast: For this Thursday, local weather conditions will generate isolated showers with moderate to heavy thunderstorms in the Pacific regions, Central Valley and mountains of the Northern Zone and the Caribbean; at night, rains will extend mainly in the Pacific coast, plus high possibility of fog banks in the GAM. Amounts are estimated in the Central Valley between 10 mm and 30 mm; while, in the Pacific regions, accumulated amounts between 40 mm and 80 mm are expected.

Warning: Soils remain with a high saturation level in the Nicoya Peninsula, South Pacific and west of the Central Valley, where rains have been recurrent in recent days. Also, the expected rains in urban areas may cause congestion in the sewage system and flash floods.
Due to the above, the IMN recommends:

- Caution for sewer saturation in places prone to this type of flooding.
- 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. These gusts can reach 80 km/h in some isolated cases.
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and WEB Page: www.imn.ac.cr

Juan Diego Naranjo Díaz
Meteorologist
DMSA-IMN

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Meteorological Warning

Heavy rains in the Pacific this Monday

September 9, 2024

10:00 am

Diagnosis: Unstable conditions continue in the atmosphere around the country, due to the proximity of the Intertropical Convergence Zone and the high humidity content. This condition, together with local factors, will favor variable rain activity for this afternoon.

Forecast: For this afternoon and early evening, showers with strong thunderstorms are expected for the Pacific slope, particularly for the mountainous areas in the Central Pacific, around the border with Panama, around the Golfo Dulce in the South Pacific and around the Gulf of Nicoya, Tempisque Valley and mountain ranges in the North Pacific. Estimated amounts between 40-80 mm with possible higher amounts at certain times.

For the Central Valley, scattered showers with thunderstorms are expected mainly in the west and north, in the rest of the region, isolated showers are possible mainly in the highlands and their surroundings. Maximum amounts estimated between 20-60 mm.

In the Northern Zone, isolated heavy showers with thunderstorms are expected, starting in the mountainous areas in the early afternoon and then moving towards the lower areas in the late afternoon and early evening. Estimated amounts are between 30-70 mm with possible higher amounts at certain times.

In the Caribbean regions, showers with thunderstorms are expected in mountainous areas and surrounding areas (10-30 mm), while the coastal areas will continue to be predominantly cloudy with the possibility of occasional rains of lesser intensity (1-10 mm), especially towards the nighttime period.

Warning: Saturated soil conditions continue in the Central Valley, Pacific slope and mountainous areas of the Caribbean and the Northern Zone, due to heavy rains over the weekend. This situation indicates a significant risk of incidents due to sewer saturation, river flooding or landslides, so special caution is recommended.

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
Roberto Vindas
Meteorologist
DMSA-IMN

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