In the Lviv region, on 17th May, the synoptic situation will be determined by the passage of an atmospheric front from the southeast. The region is expected to have cloudy weather with clear spells. At night throughout the district, and in places during the day, short showers and thunderstorms are possible. A light mist is likely in the morning. The easterly wind will have a speed of 5–10 m/s, with the temperature ranging from 7–12°C at night and 19–24°C during the day.
In Lviv, the weather will also be cloudy with clear spells. A short shower is expected at night, with a possibility of a thunderstorm. No rain is forecasted during the day. A light mist may occur in the morning. The wind will be easterly, with a speed of 5–10 m/s, and temperatures will be 9–11°C at night and 21–23°C during the day.
Visibility will worsen to 500–1000 metres under conditions of precipitation and mist. Atmospheric pressure will increase, and relative humidity will decrease.