India, Feb. 11 -- Lyft forecast first-quarter bookings and adjusted core profit below expectations on Tuesday, hit by severe winter storms in parts of the U.S., overshadowing a new $1 billion share repurchase program and sending shares 13% lower in after-hours trading. The weaker first-quarter forecast shows the effects of Winter Storm Fern, which brought heavy snow, icy conditions and prolonged extreme cold to large parts of the United States, particularly on the East Coast, disrupting travel and dampening ride demand during the quarter. Lyft forecast current-quarter gross bookings of $4.86 billion to $5 billion, with a midpoint largely in line with the average estimate of $4.95 billion. It expects adjusted core profit of $120 million to...