Somerset in command at Edgbaston
Nick Compton and James Hildreth starred for Somerset with an unbroken 132-run stand against Warwickshire.
Compton and Hildreth's unbroken stand gave the only unbeaten side left in LV= County Championship Division One a fine first day.
The pair joined forces just after tea with the hosts threatening to take control at 105 for three yet, after biding their time during a slow scoring period, Compton and Hildreth both looked at ease as the visitors took the first batting point on offer and closed on 237 for three.
They had both reached 72 at stumps after former England opener Marcus Trescothick had followed up last week's hundred against Durham with a half century prior to tea.
Heavy rain in the Birmingham area on Saturday had left the Edgbaston outfield saturated and meant no play was possible before lunch.
Twenty-one overs were therefore lost and play eventually began at 1.30pm with Warwickshire, unable to call upon Ian Bell due to his England commitments, electing to bowl after winning the toss.
Keith Barker marked his 50th first-class appearance with the breakthrough wicket in the 11th over as Johann Myburgh edged to Jeetan Patel at second slip to depart for 15.
Trescothick, whose 133 against Durham had helped Somerset to their second win of the campaign, was patient in making 22 off 66 balls until he took a fancy to the fit-again Boyd Rankin, hooking the tall seamer over the ropes for six.
That was the signal for the Somerset skipper to open up more but, after reaching 53, Rikki Clarke uprooted his off stump to leave the visitors two down.
Tea was taken with the visitors 105 for two and they were unable to further that total when Alviro Petersen became the next to fall in the first over of the new session.
After contributing 12 - all accrued through fours - he chipped a loose shot off Patel straight to Clarke at mid-on, who was only fielding there rather than in the slips because of a broken finger.
Petersen's wicket came in the middle of a period of tight bowling with a 24-ball spell without a run eventually ended in style as Hildreth found the ropes when Rankin's line went awry.
Scoring was still proving hard to come by, though, and with the two at the crease perhaps sensing the need to force the issue, Barker almost snaffled a sharp caught-and-bowled chance off Hildreth.
Chris Wright - whose 14 overs yielded no reward and 56 runs - was struggling to find the right areas and that allowed Hildreth and Compton to ease the pressure, the former pulling the third maximum of the innings over teenager Sam Hain on the square-leg boundary to take the score past 150.
Somerset's number five soon began to make hay as he launched Patel over mid-wicket for six and shortly afterwards claimed a single off the same bowler to bring up a pair of landmarks - his fifty and his side's 200, the latter accomplishment bringing the visitors a batting point.
A textbook straight drive from Compton took the fourth-wicket alliance into three figures and Hildreth looked to finish with a flourish, blasting Clarke through the long-on region for three fours in the same set of six.
Warwickshire's disappointing session was compounded by the fact Ambrose left the field for treatment on an injury, Pete McKay having to fill in behind the stumps.