Nottinghamshire overcame both the threat of rain and a spirited Worcestershire performance to wrap-up a 92-run victory on day four at Trent Bridge.
The Outlaws began the final day requiring four further wickets for an opening round win, while Worcestershire arrived at the ground in hope more than expectation with 157 more runs required.
The task proved too steep for the Pears, who made a disastrous start when Shaaiq Choudhry was trapped lbw by Luke Fletcher (4-53) in the opening over.
James Cameron and David Lucas added 33 for the eighth wicket, however they were separated when the latter chopped a wide Andre Adams delivery back on to his stumps.
New Zealander Adams (4-90) then showed quick reactions to dismiss Richard Jones, but with rain beginning to fall, Notts were running out of time to close the game out.
Neil Edwards shelled a comfortable catch at second slip with Cameron on 26, however Notts secured a 19-point haul when, just two balls later, Fletcher's leg before appeal was upheld as Alan Richardson departed for a duck.
A late burst of wickets put Nottinghamshire on course for victory in their opening LV= County Championship match of the season - but not before Worcestershire batsmen Daryl Mitchell and Moeen Ali had given the hosts a big scare.
Having been set 392 to win, the pair added 178 runs for the third wicket to push Worcestershire to within 157 runs of their target.
But a lapse in concentration from Ali saw the left-hander dismissed for 94, and three more wickets fell in the last five overs as the balance swung back dramatically in Nottinghamshire's favour.
First Alexei Kervezee played on to Ben Phillips before Luke Fletcher followed up with two wickets in two balls, bowling Mitchell for a hard-fought 102 from 239 balls and then castling Ben Scott.
The visitors reached 258-6 at the close, needing a further 134, but with only four more wickets required Notts will be favourites for the win on Sunday.
Riki Wessels hit an unbeaten century to put Nottinghamshire in complete command at the halfway stage against Worcestershire at Trent Bridge.
The former Northamptonshire player finished the second day unbeaten on 104, his efforts helping the hosts amass 355-7 in their second innings. They will return on Saturday already boasting a lead of 343.
Wessels, who hit 13 boundaries in his 13th first-class ton, combined with skipper Chris Read (68) to put on a fifth-wicket stand of 134 in just 22 overs.
The pair built on the excellent efforts of the top order, proving that it was possible to score runs on a surface that had seen 20 wickets fall on the opening day of the Division One contest.
Alex Hales (46) and Neil Edwards (48) laid the platform with a first-wicket stand of 94, astonishingly Notts' highest opening partnership in four-day cricket since August 2008.
Although the pair both fell in the space of three overs, Michael Lumb weighed in with 40. With Wessels and Read picking up the pace before the latter fell to the second new ball, the Pears look to be in a real pickle.
Bowlers ruled at Trent Bridge as 20 wickets fell on the opening day of Nottinghamshire's clash with Worcestershire.
Asked to bat, Nottinghamshire were bowled out for 118 in 41.4 overs with Pears seamer Richard Jones claiming 6-32.
Only Paul Franks, with an unbeaten 51, resisted for long despite a largely blameless pitch.
Worcestershire fared little better in reply, dismissed for 130 in the final over of the day as the home side's seamers shared the wickets around.
Australian opener Michael Klinger's 29 was the top score, while Luke Fletcher (3-45), Ben Phillips (3-29), Andre Adams (2-30) and Paul Franks (2-23) all got among the wickets.