You might ought to go below.

source: 
COCA
Entry: 
1021
Example: 
A sailor went by on his way up the ladder of the forecastle, and said to me, "You might ought to go below."
Modal 1: 
might
Modal 2: 
ought to
Gender: 
Male
Race/Ethnicity: 
Unknown
Age: 
unknown
Level of Education: 
Unknown
Home Community, Town, or State: 
Unknown
Location Collected: 
Fictional Novel
Year: 
2009
Relation to Addressee: 
man to man
Medium: 
Written
Sentence Structure: 
1.q
Status: 
Naturalistic
Notes: 
Source: Micklem, Sarah. 2009. 'Wildfire' New York: Scribner (author was born in VA) Full Context: reigners among them understood, but I did not. There was a great bustle as oarsmen -- half of them mud soldiers, for there weren't enough seasoned mariners in the fleet -- ran out the oars. The whiphands played their shrill whistles and the ships drew farther apart. Sailors took down the huge mainsail and hoisted a small square one, so we ran with just the storm sail and the smaller sails fore and aft. # A sailor went by on his way up the ladder of the forecastle, and said to me, " You might ought to go below. " # I said, " Will it be bad? " # " We're in for a bit of a squall, " he said. # No doubt the warning was kindly meant, but I was too ignorant to be afraid. I found it exhilarating, the shrill windsong in the rigging, the changeable light on the sea. A priestess of Delve and her attendants were on the high deck of the sterncastle, chanting and shaking copper disks. Cataphracts and armigers of