Belgium is currently on a yellow precipitation alert, with several rivers in Wallonia on pre-flood alert, as reported by the Walloon public service. The pre-alert thresholds in various municipalities could be reached on Saturday, April 1st, with regards to the Vesdre and its tributaries, the Lower, Middle and Upper Ourthe, the Our, the Amblève and its tributaries, the Semois and its tributaries, the Files, the Vierre, and the Dender and its tributaries. However, the expected increase in flow in the Senne basin should be contained in the flood retention structures, and thus not cross the pre-alert thresholds.
While Belgium is placed on yellow precipitation alert this Saturdayseveral rivers in Wallonia are on pre-flood alert, according to the Walloon public service.
Vesdre and tributaries
According to available forecasts, the pre-alert thresholds could be reached on Saturday 01/04 in the early afternoon.
This concerns the municipalities of Baelen, Chaudfontaine, Dison, Eupen, Liège, Limbourg, Olne, Pepinster, Theur, Trooz and Verviers.
Amblève and tributaries
According to the forecasts available, the pre-alert thresholds would be crossed on Saturday 01/04 at the end of the afternoon.
Lower Ourthe
According to the forecasts available, the pre-alert thresholds would be crossed during the night of Saturday 01/04 to Sunday 02/04 in the downstream part of the basin. Exceeding pre-alert thresholds in the upstream part of the basin cannot be ruled out.
Middle Ourthe
According to the forecasts available, the pre-alert thresholds would be crossed during the night of Saturday 01/04 to Sunday 02/04 in the downstream part of the basin. Exceeding pre-alert thresholds in the upstream part of the basin cannot be ruled out.
Upper Ourthe
According to the forecasts available, the pre-alert thresholds would be crossed during the night of Saturday 01/04 to Sunday 02/04 in the downstream part of the basin. Exceeding pre-alert thresholds in the upstream part of the basin cannot be ruled out.
Our
According to available forecasts, the pre-alert thresholds on the Our could be crossed on Saturday 01/04 in the middle of the evening.
Sure
Over the past 24 hours, heavy rainfall has been observed in the Semois basin (up to 30 L/m² locally). Coupled with the rainfall forecast by Sunday 02/04 midnight, the pre-alert thresholds could be reached in the upstream areas of the basin and the flows could be maintained around the pre-alert threshold until Sunday 02/04 inclusive.
Upper Semois and tributaries
Over the past 24 hours, heavy rainfall has been observed in the Semois basin (up to 30 L/m² locally). Coupled with the rainfall forecast by Sunday 02/04 midnight, the pre-alert thresholds could be reached in the upstream areas of the basin and the flows could remain around the pre-alert threshold until Sunday 02/04 inclusive
Average Semois
Over the past 24 hours, heavy rainfall has been observed in the Semois basin (up to 30 L/m² locally). Coupled with the rainfall forecast by Sunday 02/04 midnight, the pre-alert thresholds could be reached in the upstream areas of the basin and the flows could remain around the pre-alert threshold until Sunday 02/04 inclusive
Files and tributaries
Over the past 24 hours, heavy rainfall has been observed in the Semois basin (up to 30 L/m² locally). Coupled with the rainfall forecast by Sunday 02/04 midnight, the pre-alert thresholds could be reached in the upstream areas of the basin and the flows could remain around the pre-alert threshold until Sunday 02/04 inclusive
Vierre
Over the past 24 hours, heavy rainfall has been observed in the Semois basin (up to 30 L/m² locally). Coupled with the rainfall forecast by Sunday 02/04 midnight, the pre-alert thresholds could be reached in the upstream areas of the basin and the flows could remain around the pre-alert threshold until Sunday 02/04 inclusive
Charleroi-Brussels Canal
According to the available forecasts, the expected increase in flow in the Senne basin should be able to be contained in the flood retention structures (empty and operational), and ultimately not cross the pre-alert thresholds.
Dender and tributaries
According to the forecasts available, the pre-alert thresholds could be reached on Saturday in the middle of the day on the channeled Dender.
This concerns the municipalities of Ath, Chièvres, Lessines and Leuze-en-Hainaut.
Seine and tributaries
According to the available forecasts, the expected increase in flow in the Senne basin should be able to be contained in the flood retention structures (empty and operational), and ultimately not cross the pre-alert thresholds.
As the yellow precipitation alert remains in effect for Belgium, several rivers in Wallonia are on pre-flood alert. Residents in the affected municipalities are urged to take precautions and stay informed of the situation. The weather forecast shows heavy rainfall continuing until Sunday, which could cause the pre-alert thresholds to be exceeded and result in flooding. We urge everyone to stay safe and be cautious during this time.