---
title: "Black Sea Cyclone Hits the Left Bank: Where Thunderstorms, Winds Up to 20 m/s and a Yellow Alert Are Expected on September 23"
description: "On September 23, the Black Sea cyclone will bring heavy rain, thunderstorms and winds with gusts up to 15–20 m/s to Ukraine's Left Bank. A yellow alert level has been declared in the eastern and southeastern regions."
date: 2026-09-23T04:02:00.000Z
lang: en
url: https://xab.info/en/posts/black-sea-cyclone-ukraine-weather-september-23-en
tags: [black-sea-cyclone, ukraine-weather, storm-wind, yellow-alert, hydro-meteorology]
publisher: "XAB.info"
---

# Black Sea Cyclone Hits the Left Bank: Where Thunderstorms, Winds Up to 20 m/s and a Yellow Alert Are Expected on September 23

![Woman with a yellow umbrella walking on a wet city street in the rain during the Black Sea cyclone](https://xab.info/media/2026/09/23/chernomorskij-cyklon-pogoda-ukraina-23-sentyabrya/chernomorskij-cyklon-pogoda-ukraina-23-sentyabrya-1.webp)

## 🎯 Key Points

- The Black Sea cyclone will bring heavy rain, thunderstorms and winds with gusts up to 15–20 m/s to the Left Bank on September 23
- A yellow alert level has been declared in the eastern and southeastern regions; heavy precipitation is possible in Poltava, Sumy and Chernihiv oblasts
- Daytime temperatures will be 13–18° in most oblasts and 7–12° in the Carpathians; on September 22, −1° and a thin layer of snow were recorded on Pop Ivan Mountain
- Publication headlines speak of a "storm" wind, yet the actual gusts of 15–20 m/s correspond to a strong, not storm, wind

On Wednesday, September 23, an active cyclonic system that formed over the Black Sea is unfolding across Ukraine. According to the Ukrainian Hydrometeorological Center, as reported by RBC-Ukraine, the main impact of the weather falls on the Left Bank: heavy rain, thunderstorms and strengthening winds are forecast there, and a yellow alert level has already been declared in several regions. Meteorologists emphasize that the most difficult weather conditions are expected in the eastern and southeastern regions of the country, where the cyclone's frontal zone is passing most intensely.

### Cyclone's Area of Influence and the Nature of Precipitation

Across Ukraine as a whole, the day will see variable cloudiness with clearings, and brief rain will fall over most of the territory. However, in certain regions the precipitation will take a pronounced form: heavy rain is possible during the day in Poltava, Sumy and Chernihiv oblasts. These areas, together with the eastern and southeastern directions, fall within the zone of heightened attention for meteorological services, where local downpours may be accompanied by thunderstorm activity and sharp changes in conditions.

### Temperature Background: From 18 Degrees on the Plain to Frost in the Mountains

The temperature regime on September 23 will be uneven. In most oblasts, daytime air will warm up to 13–18 degrees above zero, while in the Carpathians the thermometer will reach 7–12 degrees. For contrast: on September 22 the temperature on Pop Ivan Mountain dropped to −1 degree, and a thin layer of snow formed in places. Such a spread between the plain part of the country and the highlands clearly demonstrates the vertical unevenness of the weather, characteristic of the transitional autumn period.

### Wind Regime: The Left Bank and the Right Bank in Different Conditions

The wind on this day will have a pronounced regional character. On the Right Bank a northwesterly wind of 5–10 m/s is expected, which corresponds to moderate conditions. The picture on the Left Bank is different: a southeasterly wind will blow at 7–12 m/s, with gusts up to 15–20 m/s. It is precisely such gusts, combined with downpour rain, that form the basis for declaring a yellow alert level in the Left Bank regions lying on the cyclone's front.

### Contradictory Data

Here it is worth noting a terminological mismatch between the headlines of several publications and the actual forecast figures. The sources' headlines use the phrase "storm wind," yet the text of the Ukrainian Hydrometeorological Center's forecast itself puts the maximum gusts on the Left Bank at 15–20 m/s. On the generally accepted scale this corresponds to a strong wind, whereas a storm is usually considered wind of 25 m/s and above. Thus, one viewpoint — the headline one — emphasizes the "storm" nature of the phenomenon, while the other — the Hydrometeorological Center's actual data — describes a strong, but not storm, wind. For the reader this means: one should not expect the kind of destruction typical of a true storm, however, gusts up to 20 m/s combined with downpours are capable of damaging weakly secured structures and hindering traffic.

### Broader Context: Groundwater Level and Precipitation Regime

Experts had previously also drawn attention to the prolonged decline in the groundwater level in Ukraine. Among the causes cited were changes in the precipitation regime, high temperatures and long rain-free periods. The current cyclone, bringing intense precipitation to the Left Bank, may become one of the episodes capable of partially compensating for the moisture deficit accumulated during the preceding dry periods. Nevertheless, a one-off downpour does not eliminate the systemic imbalance of the water regime, which, according to expert estimates, forms over a considerably longer interval.

## 🔍 Fact-Check Verification

- [Bad weather is heading for Ukraine: where heavy thunderstorms and storm winds are forecast on September 23](https://www.rbc.ua/ukr/news/ukrayini-yde-negoda-de-23-veresnya-prognozuyut-1790084838.html) - Основной источник: данные Украинского гидрометцентра о циклоне, дождях, ветре 7–12 м/с с порывами до 15–20 м/с на Левобережье, температуре 13–18° и желтом уровне опасности.
- [A cyclone with heavy rain and storm winds is heading for Ukraine: forecast for September 23](https://glavnoe.in.ua/ru/novosti/na-ukraynu-ydet-czyklon-s-sylnymy-dozhdyamy-y-shtormovym-vetrom-prohnoz-na-23-sentyabrya) - Подтверждает наличие циклона с сильными дождями и усилением ветра на 23 сентября; заголовок использует термин «штормовой», что не совпадает с фактическими порывами 15–20 м/с.
- [Danger approaches Ukraine with a powerful cyclone: meteorologists named the dates and cities where ...](https://tsn.ua/ru/ukrayina/v-ukraine-s-moschnym-tsiklonom-nadvigaetsya-opasnost-sinoptiki-nazvali-daty-i-goroda-v-kotoryh-stihiya-razbushuetsya-3173429.html) - Подтверждает масштаб циклона и зоны опасности; акцент на стихийных явлениях согласуется с описанием гроз и сильного ветра на Левобережье.
- [Thunderstorms, heavy rain and storm winds: where tomorrow's weather will be the worst](https://ukranews.com/news/1176479-grozy-silnye-dozhdi-i-shtormovoj-veter-gde-zavtra-budet-samaya-plohaya-pogoda) - Подтверждает грозы и сильные дожди; термин «штормовой ветер» в заголовке не подкреплен цифрами выше 25 м/с в тексте прогноза, что отражено в разделе противоречий.

## ❓ FAQ

### Q: Where is the most difficult weather expected on September 23?
**A:** The most difficult conditions are forecast on the Left Bank, in the eastern and southeastern regions of Ukraine, as well as in Poltava, Sumy and Chernihiv oblasts, where heavy precipitation is possible during the day.

### Q: What will the temperature be on September 23?
**A:** In most oblasts, daytime air will warm up to 13–18 degrees above zero, and in the Carpathians up to 7–12 degrees. For comparison, on September 22 the temperature on Pop Ivan Mountain dropped to −1 degree with a thin layer of snow.

### Q: How strong will the wind be?
**A:** On the Right Bank a northwesterly wind of 5–10 m/s is expected, and on the Left Bank a southeasterly wind of 7–12 m/s with gusts up to 15–20 m/s. On the generally accepted scale, this is a strong, but not storm, wind.

### Q: Has an alert level been declared?
**A:** Yes, a yellow alert level has been declared in several oblasts due to heavy rain, thunderstorms and strengthening winds brought by the Black Sea cyclone.