Meteorologist Gytis Valaika writes on his Facebook account “Weather and climate in Lithuania” that he has received several questions about the extremely wet wind storm named Boris: can it happen in Lithuania and has there been something similar to what happened in Central Europe, where in 6 days in some areas about up to 150-400 mm of precipitation.
“Similar cases of very heavy and very exceptional rain occurred in Lithuania in 2005 and 2007. (…) I myself well remember both cases, when calm and small streams in Southern Lithuania very quickly turned into wide and fast rivers, and the grass turned especially richly green”, he writes.
According to G. Valaika, in Lithuania in 2005 in August On days 8-11, especially a lot of rain fell as the southern cyclone approached. When it came, heavy rains started, accompanied by a rather strong wind (up to 15-22 m/s). Heavy rain was then recorded in many parts of the country, and in Nida the intensity of the catastrophic rain was reached (82 mm of rain fell in 12 hours on August 9). As a result of this precipitation, the water level in the rivers rose very sharply, the flood caused a lot of damage to the residents of Southern and Western Lithuania. In just 4 very rainy days of August, up to 150-250 mm rained in some districts of Lithuania (see the upper map on the left), and this amount of precipitation corresponds to even two to three August norms.
Another similar and rather unique case occurred in 2007. in July On days 5-8, when an active cyclone, formed by the merging of three small eddies of low atmospheric pressure over Lithuania, led to extremely rainy weather. The heavy rains continued for four days, covering more and more new districts of Lithuania.
During these rainy days, up to 100-200 mm of rain fell in some districts of Lithuania (see the map below on the left). This amounts to 1.5-2.5 of July precipitation rates. The surroundings of Trakai suffered the most, where a natural meteorological phenomenon was recorded – long-lasting heavy rain (when the amount of precipitation that fell in 5 days or less exceeds the average multi-year monthly precipitation amount by 2-3 times). According to the data of the Trakai water measuring station, from July 5. 9 o’clock until July 9 9 o’clock as much as 202 mm (that is 20 large buckets of water per 1 square meter) fell and was two and a half times higher than the then July rainfall rate.
“Thus, the answer to the question of whether something similar to what happened in Central Europe can happen in our country emerges from these cases. Yes, you can. Despite this, the probability of the recurrence of such a phenomenon is very small, but gradually growing”, concludes G. Valaika.
Source: www.15min.lt
