Lancashire won the toss under cloudy skies and, as the openers Mellor and Hameed struggled against Fisher and Shaw, Stephen Parry appeared to have forgotten the Golden Rule at Headingley – win the toss and look up not down.
Matt Fisher, having returned from Edgbaston where the 1st XI did not require his services on this occasion from the Kirkstall Lane end and Josh Shaw from the Rugby Stand end and both found lift and movement, causing both Lancashire openers to play and miss frequently but only Andrew Mellor, caught behind for just three, actually succumbed.
Hasseb Hameed and Luke Proctor battled away and, gradually, the Lancashire score mounted. Rain caused the first interruption at 12.17, when an early lunch was taken, with the Red Rose on 52/1.
Proctor went on and on once play resumed at 1.45 and duly completed a hard-fought century from 199 deliveries with 12 boundaries.
Lancashire compiled partnerships of 72, 66 and 76 to take themselves from 8/1 to 222/4. Tea arrived with no further interruptions but only seven deliveries were possible after tea as a snick from Parry eluded Tattersall at first slip. The Yorkshire fielder had not been able to see the ball at all and so the Umpires exercised their duty of care and took the players off.
The rain then returned and play was abandoned for the day at 6.00 pm after 63.1 overs with the visitors well placed on 233/4. Josh Shaw (2/53) was the pick of the Yorkshire bowlers with Coad and Fisher vying for the title of unluckiest practitioner on the day.