You might could have caught it,

source: 
DiPaolo
Entry: 
1329
Example: 
You might could have caught it.
Modal 1: 
might
Modal 2: 
could
Gender: 
Unknown
Race/Ethnicity: 
Unknown
Age: 
unknown
Level of Education: 
Unknown
Home Community, Town, or State: 
TX (Unknown)
Location Collected: 
TX (Austin)
Year: 
1980
Relation to Addressee: 
teacher to class
Medium: 
Spoken
Sentence Structure: 
1.0
Status: 
Naturalistic