Police searching for missing David Leman had focussed their attention on Gibraltar Point this afternoon.
Search teams and helicopters were spotted patrolling scrub land at the nature reserve following the 51-year-old’s disappearance yesterday.
Police received several witness reports identifying a man matching David’s description at the reserve yesterday, but nothing since.
And as of 5pm today, police said they had not found him and the search was likely to be scaled back until morning.
David was reported missing on Monday after parking his car on South Parade to take his dog Millie for a walk.
David is of mixed race, around six foot tall with a shaven head. His clothing has not been confirmed but is thought to be jeans and a hooded jacket.
Police would particularly like to hear from any dog walkers who may have seen David and Millie yesterday morning.
Millie is a black dog with a white patch on her chest and she was wearing a red collar.
Rescue crews braved force eight winds and freezing temperatures to search for David last night.
Coastguard crews from Chapel St Leonards, Skegness and Wrangle were joined by a Rescue 128 helicopter as they searched the dunes and icy North Sea for the missing dog walker.
The 12 coastguards combed the beach between 9.50pm and 2am while the helicopter searched the sea but were unable to find him.
Chapel station manager Mark Smith said: “The weather was incredibly rough, we had force six westerly winds gusting force eight, snow showers and minus eight wind chill - it was tough conditions and a difficult search.”
Anyone with information should contact Lincolnshire Police on 101, quoting incident number 451 of February 4.