LV COUNTY CHAMPIONSHIP DIVISION ONE, Taunton:
CLOSE OF PLAY, DAY ONE: Warwickshire 127, Somerset 145-3
Somerset 3pts, Warwicks 1pt
Thomas's 5-41 are his best bowling figures in England
Alfonso Thomas took five wickets as Somerset bowled Warwickshire out for just 127 on day one at Taunton.
The South African picked up 5-41, including a burst of four wickets in 23 balls, and was well supported by Charl Willoughby (3-51).
Varun Chopra (45) top scored for the Bears, but only three other visiting batsmen reached double figures.
Somerset reached 145-3 at the close, a lead of 18, with opener Arul Suppiah unbeaten on 61.
An unusually green wicket at the County Ground persuaded home captain Marcus Trescothick to field after winning the toss and he was vindicated as Thomas picked up his best figures in English cricket.
Chopra, who was dropped at third slip on two off the bowling of Ben Phillips, helped the Bears to 63-1 he, along with Darren Maddy, Rikki Clarke and Tim Ambrose were removed by Thomas as the visitors slipped to 78-5.
A recovery never looked likely and only Chris Woakes, with 28 from 38 balls, put up any resistance as Warwickshire's last five men were all bowled.
Somerset were soon in their own spot of trouble as Trescothick was got a leading edge to be caught and bowled by Andrew Miller and Nick Compton was caught behind off the same bowler.
But Suppiah and Zander de Bruyn (34) steadied the ship, with James Hildreth weighing in with an unbeaten 35 when de Bruyn fell to Imran Tahir.
Craig Kieswetter, at Downing Street on Monday with England's ICC World Twenty20 squad, will come in to the Somerset side on day two in place of Compton.
BBC Coventry and Warwickshire's Clive Eakin:
"Usually a first day at Taunton is an opportunity for batsmen to fill their boots. But such is the shortage of confidence in the Warwickshire batting line-up, that the Bears couldn't take advantage.
"Their cheap dismissal will have done nothing to quieten the increasingly loud concerns being expressed by Bears supporters. The top-order batsmen are really struggling and were cruelly exposed in the absence of Bell and Trott.
"In fairness Darren Maddy and Jim Troughton did both try to knuckle down and battle their way into form but both got out just as they looked to have laid the foundations for decent scores.
"But Westwood, Ambrose and Clarke could offer little resistance and Imran Tahir's innings batting at number nine was just awful. It was an embarrassing attempt to slog which left his batting partner Chris Woakes looking utterly bemused."