According to the Ukrainian Hydrometeorological Center, the weather in Ukraine on Wednesday, August 26, is expected to be generally partly cloudy, but it will not be uniform across the country. Meteorologists identify two competing air masses that will determine the day's picture in different regions. It is precisely their interaction that explains why some regions may see rain and thunderstorms within the day, while others will enjoy mostly dry and cool weather.
Two weather poles: a front and an anticyclone
Unstable weather in certain regions will be caused by an atmospheric front associated with a cyclone located over the Balkans. Within its zone of influence, moderate, locally heavy rain and thunderstorms are likely. Across the rest of the country, dry weather will be determined by a high-pressure field emanating from an anticyclone centered over southern Scandinavia. Thus, on a single day the country effectively hosts two regimes: a moist frontal one and a dry anticyclonic one.
Where rain and thunderstorms are likely on August 26
According to the Ukrainian Hydrometeorological Center's forecast, moderate, locally heavy rain and thunderstorms are expected in certain regions, the list of which is given in the hydrometeorological center's operational infographic. Across the rest of the territory, precipitation is unlikely. Importantly, the exact list of regions falling within the front, as well as specific temperature values, is not disclosed numerically in the provided materials, so when planning business or field work it is recommended to check the current precipitation map on the Ukrainian Hydrometeorological Center's website.
Cool air and the nighttime minimum
Specialists at the Ukrainian Hydrometeorological Center explain that, due to the anticyclone's influence, "cool air will be moving toward us." Its "breath," meteorologists clarify, will be felt most noticeably in the northern part of the country, especially at night. This means that overnight temperatures in the coming night will be lower than daytime ones, and in the northern regions the coolness can be felt already in the dark hours.
Outlook for August 27–28
Going forward, based on the Ukrainian Hydrometeorological Center's forecast for August 26–28, rain will become more widespread in Ukraine. On Thursday, August 27, brief rain, locally with thunderstorms, is expected over most of the country's territory, with the exception of a number of regions. On Friday, August 28, brief rain and thunderstorms are also likely in several regions. In other words, by the end of the week frontal activity and the probability of precipitation will be increasing, not decreasing.
Weather in Kyiv and the Kyiv region
Over Kyiv and the Kyiv region on Wednesday, August 26, according to the Ukrainian Hydrometeorological Center, partly cloudy skies and mostly no precipitation are expected. The exception is the daytime hours in the southern part of the region, where brief rain, locally with thunder, is likely. For the capital this means an overall calm day with no significant precipitation in the central and northern districts.