Northamptonshire's hopes of taking full control of their LV= County Championship Division Two match against Glamorgan were held up by rain and the swing bowling of Jim Allenby on the second day at the SWALEC Stadium.
Only 17.1 overs were possible during 70 minutes of play with Northamptonshire moving on to 145 for five for a first-innings lead of 11.
In that time Allenby gave Glamorgan hopes of a comeback with the wickets of Rob Newton and Stephen Peters.
The morning session was washed out because of steady drizzle and, after an early lunch, play eventually resumed at 1:10pm with Northamptonshire 108 for three, 26 behind Glamorgan's 134 all out.
Captain Peters and Newton batted watchfully in the opening hour and edged the visitors into a lead.
Yet that advantage stood at just three runs when Northamptonshire lost their first wicket of the day.
Newton was lbw to a swinging delivery from Allenby after making 39 in a 79-run partnership with his captain.
Allenby struck again three overs later to dismiss Peters, who edged to Stewart Walters at second slip having added only seven to his overnight score of 60.
Rain then forced another halt at 2:25pm and play was eventually abandoned at 4:45pm.