The phrase "a week and possibly" is correct and usable in written English.
It can be used when discussing a time frame that is uncertain or may extend beyond a week.
Example: "The project will take a week and possibly longer if we encounter any unforeseen issues."
Alternatives: "a week and maybe" or "a week and perhaps".
The strike probably will continue for a week, and possibly until after the coronation, May 12.
The crucial Path train link, under the Hudson between New Jersey and New York, will remain closed for at least a week and possibly up to ten days, according to New Jersey governor Chris Christie.
Facing the largest budget cuts in its history, the New York City Public Library system will have to close forty branches, lay off hundreds of employees, severely cut service hours (some branches will be open only two or three days a week), and possibly restrict services including computer and Internet access, English courses, and after-school tutoring.
He's expected to be out for at least a week, and possibly longer.
That means the exchange occurred within a week — and possibly on one of the same days as — the discussions about how to respond to Snowden's emailed question to OGC, a question that was characterized as unusual.
Remind family members that you like to vacation on Martha's Vineyard every summer, so you'll be taking names of folks ready to keep the child for at least a week and possibly for a month or two.
These white cheddar balls of snow were easily the best thing I ate all week, and possibly all month.
It is becoming clear that a senior consultant presence is required seven days a week and even, possibly, around the clock for acute care.
These might be a consequence of (1) the short measurement interval and the consequential low intake during that time, (2) the assessment of consummatory behaviour more than once a week and (3) a possibly disturbing effect on the intake of control animals since CMS mice most of the time were kept and stressed in the same room [17].
It was certainly not an easy night for the N.F.C. North-leading-Bears, particularly their quarterback, but they won after a week off and possibly buried Detroit (2-4) in the process despite getting a major scare along the way.
He will follow up with speeches in Michigan and New York in the coming week, and possibly a prime-time news conference.
