Police in north Pembrokeshire are advising drivers to exercise caution as this morning's gales are blowing snow off the Preseli hills and creating blizzard-like conditions.
Police have confirmed that the mountain road into Crymych, the B4329, is impassable, as strong winds blow snow drifts off the Preselis. The stretch between Rosebush and Eglwyswrw is currently closed.
Drivers are asked to use the main A40 road instead and to take extra care.
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