ANPC Alert – Worsening of Weather Conditions

Following contact with the Sea Portuguese Institute and the Atmosphere (IPMA), held today by the National Relief Operations Command (CNOS) of the National Civil Protection Authority (ANPC), it is noted, according to the information provided, that there will be a worsening of weather conditions in the next few days, with particular emphasis on the regions north of the river and, in particular, the regions of Minho and Douro Litoral.

It stands out as major risk factors:

  • Persistent rainfall with higher intensity peaks (> 10 mm / h) during the day tomorrow (08JAN) and Sunday (10JAN), can the accumulated values ​​exceed 200 mm during this period;
  • Snowfall above 1400 meters (may go down occasionally to 1200m);
  • High winds with gusts of around 90 km / h on the coast and 100 km / h, in the highlands;
  • Sea waves on the west coast with waves up to 5m.

Relevant hydrological information:

  • Runoff and tends high subsurface, likely to cause flash floods in historically vulnerable areas, especially in the basins of the rivers Minho, Lima, Cávado, Ave, Vouga, Douro and Mondego. Not exclude the possible occurrence of flood situations associated with an increased flow of main water lines.
  • The soil saturation conditions are in favour of the occurrence of landslides, especially in steeper slope zones.

Be sure to follow weather forecasts in www.ipma.pt

  1. EFFECTS expected

Depending on the current and predicted weather conditions the following effects are expected:

  • Slippery roads and eventual formation of water and ice sheets;
  • Possibility of flash floods in urban areas, due to the accumulation of rainwater and / or failure of drainage systems;
  • Flood possibility for overflowing water lines in the historically most vulnerable areas;
  • Flooding of underground urban structures for drainage deficiencies;
  • Damage to structures mounted or suspended;
  • Difficulties in urban drainage systems, particularly during periods of high tide, which can cause flooding in places historically most vulnerable;
  • Possibility of falling branches or trees because of strong wind;
  • Possible accidents on the coastline;
  • Geomorphological phenomena caused by instability of aspects related to soil water saturation.
  1. PREVENTIVE MEASURES

The ANPC urges the population to adopt preventive actions, namely that:

  • Ensure adequate supply of storm water runoff systems, removing inert and other objects that can be dragged or can hinder the free flow of water;
  • Adopt  defensive driving, slowing down and taking special care with the possible formation of ground water and ice on traffic routes;
  • Transport and apply the snow chains on vehicles whenever driving  in areas hit by snowfall;
  • Do not cross flooded areas, to avoid entrainment of persons or vehiclesin existing holes in the floor drain or open boxes;
  • Ensuring adequate fixing of loose structures such as scaffolding, placards and other rigid structures;
  • Be especially careful in moving or residing next to wooded areas, while remaining attentive to the possibility of falling branches or trees due to strong wind;
  • Be especially careful in the circulation along coastlines and in coastal areas historically more vulnerable to flash floods;
  • Do not do activities related to the sea, including fishing, water sports and trips to the seaside, and avoids also the car park on the waterfront;
  • Be attentive to weather information and alerts the Civil Protection and the Security Forces

 


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