With a little assistance from the weather, Glamorgan captain Sam Northeast’s lengthy innings on the last day thwarted Yorkshire’s hopes of winning.
When play was delayed by lightning in the final session, Glamorgan were in a vulnerable position at 372-7, 74 runs ahead with three wickets remaining.
Colin Ingram hit 113, but Northeast took over six and a half hours to get his undefeated 142.
Joe Root and Adam Lyth, two spinners from Yorkshire, both claimed two wickets.
Their attempt to secure a favorable outcome by using a used pitch, however, was insufficient as Northeast’s powerful bat outperformed them in a crucial inning, hitting 15 fours while crucially absorbing 336 deliveries.
Due to an ankle injury, seamer Matthew Fisher was unable to bowl, therefore the four home spinners.