Riki Wessels hit the winning runs as Notts Outlaws chased a Duckworth-Lewis target to preserve their unbeaten record in the Friends Life t20.
With an uncertain forecast, Outlaws captain Adam Voges won the toss and fielded and was rewarded with a victory target of 49 from five overs after the extended rain break that followed Lancashire's 178/4.
Clean hitting from Michael Lumb (22 from 12 balls) laid the foundations for victory with Wessels hitting 5 fours in his unbeaten 8-ball 21.
Lancashire had made a solid start with a 119-run opening stand between Tom Smith and man of the match Stephen Moore. Darren Pattinson and Harry Gurney were the pick of the Notts bowlers with Andy Carter and Steven Mullaney also taking one apiece.
"It's hard to form a game plan when there is rain around but Adam is an experienced captain and he knew that we would be best off letting them bat and waiting to see what we needed to do," said Pattinson.
"When we heard the revised target I wasn't sure if it was generous or not but the batters were on top of it straight away and played at the right pace to get us through."
Notts return to action on Thursday when Yorkshire visit Trent Bridge in a floodlit encounter beginning at 7pm.
Support Notts Outlaws in Friends Life t20 action at Trent Bridge:
v Yorkshire Carnegie - Thursday 5 July 7.00pm BUY TICKETS
v Leicestershire Foxes - Sunday 8 July 2.40pm BUY TICKETS
Click here to visit the Notts Outlaws Friends Life t20 microsite and view the Put Some Colour In Your Cricket campaign video.
Ticket Offers - Call 0844 8118711 9.30am-4.30pm Monday-Friday
Under 16s Season Tickets £22
Under 21s Season Tickets £32
Groups of 10 or more adults: £10.40 per ticket (must be purchased by 4pm the day before each game)
Groups of 8 juniors and two adults: £69 (must be purchased by 4pm the day before each game)
Ticket Prices - Click here to buy online
In advance (available until 4pm the day preceding each game): Adults £13 / Under 16s £7 / Senior Citizens £7 / Family (2+2 £33)
On the day: Adults £16 / Under 16s £8 / Senior Citizens £16 / Family (2+2 £40)
FRIENDS LIFE t20 GROUP STAGE REFUND POLICY AT TRENT BRIDGE:
If no result is obtained then you will be entitled to use your match ticket for entrance to any other Notts Outlaws Friends Life t20 group match, Clydesdale Bank 40 group match or a day of LV= County Championship cricket at Trent Bridge in 2012.
If play is restricted to 9.5 overs or less and there is no result then you will also have the option of a full refund.
This policy applies to paid-for match tickets only and refunds must be claimed by Friday 14 September 2012.