Storm Babet ar 20 Hydref oedd y storm gyntaf a enwid i effeithio ar Gymru y gaeaf hwn. Roedd y glaw trwm ar draws rhannau helaeth o Gymru yn golygu bod Cyfoeth Naturiol Cymru wedi cyhoeddi rhybudd llifogydd difrifol i'r Hafren, a nifer o rybuddion llifogydd ar draws gogledd a chanolbarth Cymru. Yn yr un modd, daeth glaw trwm ar draws de-orllewin Cymru yn y dyddiau cyn Storm Ciarán ac yn ystod y storm ar 1 a 2 Tachwedd â gwyntoedd cryfion a glaw pellach, gan arwain at rybudd llifogydd difrifol ar gyfer Afon Ritec yn Ninbych-y-Pysgod, rhybudd llifogydd ar gyfer Afon Solfach, a sawl rhybudd llifogydd ar draws Gorllewin Cymru.
The arrival of Storm Babet on 20 October marked the first named storm to affect Wales this winter season. The heavy rainfall across large parts of Wales meant that Natural Resources Wales issued a Severe flood warning for the Severn, and several flood warnings and alerts across north and mid Wales. Similarly, heavy rain across southwest Wales in the days leading up to and during Storm Ciarán on 1 and 2 November brought high winds and further rainfall, resulting in a severe flood warning for the River Ritec in Tenby, a flood warning for the River Solva, and several flood alerts across West Wales.