Prepare before it arrives, and first find out from which direction it would come. Most Neveras come from the west, between northwest and southwest, but not all. A Nevera usually comes from the same direction as the wind high up, at about 5,500 meters. In apps such as Windy, you can see this wind by choosing the 500 hPa level. On a thunderstorm day, spend the night in a bay protected from that direction, or in a marina. At anchor, let out more chain. On a buoy, double the lines.
In a protected bay, when the storm is close, close all hatches, tie down loose things such as paddle boards, start the engine and keep someone at the helm. If the anchor drags, motor slowly into the wind and hold the boat away from the shore and other boats. Don’t try to re-anchor or enter a marina in the strongest gusts. Wait until it passes.
If you are anchored in a bay open to that direction, don’t wait for the Nevera to hit. Lifting the anchor in a Nevera is hard, often impossible. Lift it as soon as the Nevera is on its way, and go out to open water, away from the shore and other boats. Out there, and whenever a Nevera catches you under way, take the sails down early, keep the bow into the wind and motor through it.
As a last resort, if you are too late and can’t lift the anchor: let out all the chain, cut the rope that ties the end of the chain to the boat, and let the anchor and chain go. Then motor away from the shore. After the Nevera has passed, you can always dive to pick them up from the seabed, or call the charter company to organize a diver.
Skipper Hotline tells its clients from which direction a possible Nevera would come, early enough to choose a bay protected from it.