Cyclone Per

Per hurricane, also called storm by, or January storm in 2007, was a strong depression that has hit the January 14, 2007 Götaland and Svealand on Sunday. Blekinge, Halland, Småland, Västra Götaland, Östergötland, Öland and Gotland were affected by the strongest winds. Skåne and Södermanland in no lesser extent. To a certain extent also Värmland, Orebro, Västmanland and Uppland. On the coasts of the Skagerrak and Kattegat, on Lake Vänern, on the Baltic Sea with Hanö and south of Roslagen in northern gale-force winds were measured. Squalls were recorded also in the entire hinterland, if not at every station. The highest measured wind speed was loud to Swedish meteorological institute 144 km / h on Hanö.

Damage and consequences

Three people died, due to the high winds, falling trees. In two cases, these people were sitting in a car, the third dead man was an eight year old boy from Motala who was driving with his father on a moped. Two other people died in clearing on 15 January, one in Vimmerby and another on Öland.

Approximately 280,000 households were from 22.00 clock Sunday without power. The reason called the three largest electricity suppliers in Sweden, the storm and the subsequent bad weather. Part of the households had to manage more than a week without electricity. Another reason is that, especially in rural areas, aboveground power lines. In this fall regularly during storms trees and tearing them.

As of Sunday at 14.30 clock had to live about 37,000 people without a telephone in Western and Southern Sweden, so the information of Telia. On Monday evening, there were already 60-70000 households that were without phone. In mobile network, there were serious disturbances during the storm and the days thereafter.

At that time, informed the Railway Authority and the Swedish railway that all rail traffic in western Sweden is set on Sunday. With the exception of "Western main line " mentioned railway line in southern Sweden and the railway line Nässjö - Falköping ( Jönköpingsbanan ) because the risk was too great to put the rail traffic on the routes concerned continued. From the afternoon of January 14, the train service was mostly produced back in the districts of West Götaland, Skåne, Halland and Kronoberg in the district. In Skåne the train service could be maintained over the Öresund Bridge during the entire storm duration. Throughout the Sunday there was no rail replacement buses. During the Monday many train connections were still disturbed, but the rail replacement bus service began to function slowly.

Preliminary estimates on the day after the storm assumed that about 16 million cubic meters of forest had been felled by the storm. Later templates exact figures, these estimates turned out to be pretty accurate.

Naming

Responsible for the naming was the Norwegian Meteorological Institute. They gave the low pressure area as the first name Per The naming took place there after the usual alphabetical order. So by was the ninth storm after the storm Gudrun. The Swedish Meteorological Institute are the storms no proper names, but names them after the month and the year in which they occur.

The course of the hurricane

The hurricane caused a low pressure area, which drew over Scandinavia. Starting from the North Sea over Norway, central Sweden and the Baltic Sea. South of the center of the low pressure area there were heavy winds in a large area. The center of the low pressure system moved in the night from 13th to the 14th of January in Greater Bergen Norway. The lowest recorded barometric pressure was 965 hPa The center of the storm then moved across Sweden. It took its way across Northern Värmland with a pressure of 972 hPa and on about Dalarna and Uppland. The strong winds hit western Sweden on the morning of January 14th. In the morning, the wind blew with hurricane force gusts and with an average speed of 26-27 m / s During the day, pulled the storm area across southern Sweden and fed on the evening of the east coast. A rainfall area centered on the center of the low pressure area. First there was the east of the low pressure system rain and later snow in the north and west, this related mainly to the eastern Svealand and southern Norrland.

Comparison with the hurricane Gudrun

Basically you can say that the hurricane Gudrun wreaked major damage as Per Due by 16 million cubic meters of forest were destroyed. By Gudrun about 75 million cubic meters. So about six times more. Because Gudrun also deteriorated even further the state of the forest floor by the pressure prevailing at the time of frost. Per was a total weaker than the hurricane Gudrun, with an average of 2-4 m / s weaker gusts of wind. But there were also local differences. In northern Götaland Per was equally strong or even stronger than Gudrun, while Gudrun was far more pronounced in central and southern Götaland. Per also had more closely spaced isobars. The isobars are an indication of the strength of the prevailing winds.

The low pressure tracks by Per and Gudrun have a high similarity. Both were located west of the British Isles and moved about the highlands in southern Norway. Once Per Sweden had happened, he took over Estonia, while Gudrun was moving more in the north via Karelia.

Others

• Hurricane Gudrun
• Hurricanes and strong storms in Sweden