As a result of forecasted intense rainfall on rivers, rapid increases in water levels may occur in many parts of the country, it is also possible to exceed the warning and alarm levels. Synoptics of the Institute of Meteorology and Water Management (IMWM) warn against flooding. Second and first degree alerts apply.
Hail storms and downpours may occur in most of Poland on Thursday. In some places, up to 50 liters of water per square meter can drop. Due to the expected intense rainfall, the synoptics of the Institute of Meteorology and Water Management issued second and first degree hydrological warnings on a three-stage, increasing scale.
Second degree IMGW alerts
Second degree hydrological warnings were issued for part of the voivodeship Silesian. Relate to the catchment area: Przemsza with the reservoir Przeczyce, Brynica with the bank. Kozłowa Góra, Przemsza from the reservoir Przeczyce to the mouth of Brynica, Brynica from the bank. Kozłowa to the mouth, Biała Przemsza, Przemsza from the mouth of Brynica to the mouth, Mała Vistula from the reservoir Goczałkowice to the estuary of Przemsza, Pszczynka, Mała Wisła from the reservoir Wisła Czarne to the reservoir dam Goczałkowice, Iłownica, Biała, Brennica.
As stated in the release, in the areas where the forecasted storms occur, especially in smaller rivers and in urbanized catchments, rapid increases in water levels are expected and local flooding may occur. In controlled catchments, in the event of particularly intense rainfall, warning levels will be exceeded. At the same time, it is possible to exceed the alarm states in points.
The alerts will be valid from 2pm on Thursday until 1pm. 4 on Friday.
First level IMGW alerts
Level 1 warnings are in place over a much larger part of the country. These apply to entire provinces: Warmia-Masuria Province, Podlasie, Masovian, Łódź, Świętokrzyskie, Podkarpackie, Lesser Poland and Silesian (excluding second-level alert catchment areas).
First degree warnings were also issued for the western part of the province. Lublinmost of the province. Kuyavian-Pomeranian Voivodeship and Opoleeastern part of the province. Greater Poland and for the province Pomeranian and West Pomeranian Voivodeship (the Gwda catchment area).
In the areas of forecasted storms, on smaller rivers and in urbanized catchments, rapid increases in water level and flooding may occur. In controlled catchments, in the event of particularly intense rainfall, there is a possibility of exceeding the warning levels – the release reads. The alerts will take effect at 14 on Thursday, and will expire, depending on the region, from 4-10 the next day.
It was also added that the first and second degree warnings were issued in connection with forecasted thunderstorms that occur locally. Due to its nature, intense point rainfall, where it occurs, may cause a potential hydrological threat from smaller rivers, as well as local flooding (mainly in urban areas).
What is the second degree hydrological alarm
A second level warning means that “water conditions (observed or forecasted) are in the zone above the warning conditions but below the alarm conditions”.
What is the first degree hydrological alarm
Level 1 hydrological warning is moderate. The water levels (observed or forecasted) are in the zone below the warning levels, and a rapid increase in the water level is predicted.
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