Wales weather: Schools and roads shut as snow sweeps in 22 March 2013 Last updated at 07:50 BBC Wales' Sue Charles says the weather at the end of the week will be disruptive More than 120 schools and scores of roads have been closed by snow and high winds in mid and north Wales. Flintshire and Wrexham appear to be hardest hit, with Gwynedd, Conwy and north Powys also having some snow. Roads affected include the A470 at Mallwyd, Gwynedd, that A55 at Conwy and the A5 at Corwen, Denbighshire. High winds, and the weight of snow, are reported to have toppled trees hampering the progress of snow ploughs. Bus operator GHA Coaches Ltd said it was unable to operate any services in the Wrexham and Denbighshire areas due to the snow. Friday's 09:00 GMT Stena Line service between Rosslare and Fishguard has been cancelled, and delays are reported on the Holyhead to Dublin route. Roads affected A470: Blocked - snow, Mallwyd, Gwynedd. A5: Closed - snow and fallen tree, Corwen, Denbighshire; partially blocked - fallen tree, Froncysyllte, Wrexham A525: Closed - snow, Nant-y-Garth Pass, Llandegla, Denbighshire A542: Closed - snow, Horseshoe Pass, Denbighshire A4061: Hazardous driving - snow Rhigos mountain road, Hirwaun, Rhondda Cynon Taf A55: Strong winds, Gwynedd; hazardous driving - snow, Conwy. Source: police and Trunk Road Agency Most of the 89 schools in Flintshire are closed, along with 25 in Wrexham, 10 in Powys and five in Denbighshire. Forecasters say north east and mid Wales will continue to be hit by snow over the next 24 hours, but the south west could also see rain turn to snow later. The Met Office is warning of persistent rain for parts of south and west Wales, with 30-50 mm possible by the end of the day. The colder air across north east and mid Wales could bring significant snow of 10-15 cm at lower levels. Some 50 cm is possible in the hills and mountains. High winds, reaching gale force in places, could mean there is a risk of blizzards and drifting.