Gail in Poland – as constant as summer break. Why repeatedly July and August?

July and August are the most cheerful months for polish children when they check the date. With the last days of June they start the summer vacation. For their parents it is relax time too – they regularly take a break in their activity cause it is the best occasion to spend break in Poland. There is only one uncertain thing – weather.
That mentioned few months are the moment, when in Poland occurs the highest temperature is deeply heat.

Lightning
Autor: David Prasad
Źródło: http://www.flickr.com
Commonly, after few days with 86-95 Fahrenheit degrees warm wind close the Earth connect with cool wind forthcoming from northward. Together it is initiate colossal, one-two days long gale with lightning. The biggest storms in polish past times occurred nearly 90 years ago. First one in July 1928 over Warsaw and neighborhood. That gale leads to enormous material losses.

There is no summary data but regional media informed about 62 victims , over 150 wounded, destroyed buildings, telegraph poles and trees. Lightning hits caused over 100 houses fires. Second huge gale occurred in July 1931 close Lublin. Local media notify about wind blowing at a speed of 500 km/h. Contemporary one of the biggest gale occurred between Wrocław and Łódź in 23rd of July 2009 – this two cities are more than 200 km away from each other. Gale (called “Derecho”) causes death of 10 people and 100 injured. In Poland gales with lightning are seasonal fact. Highest recurrence of gales is in mountainous part of country – in areas called Żywiecczyzna, Bieszczady Mountains and Tatra Mountains it occur about one in ten days. Lowest frequency is by the sea – one in the 18 days.

Other interesting fact are storms with hail. But what should occur to create that form of storm? 65 of 68 storms with hail occur when temperature was at least 59 Fahrenheit degrees and atmospheric pressure is roughly 850 hPA. Second factor of number of hail is closeness of weather front with equator and polar air masses. How can we be sure that our vacation won’t be disorganized by gale? Choose late August time or early June, pick other state for a expedition or take a fancy to wintertime sports.

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