Why is air from the gulf of mexico so much more humid than air from the pacific ocean at the same latitude?

The air from the 'Gulf of Mexico' is much more 'humid' than air from the 'Pacific Ocean' at the same latitude because the air flowing over the 'Gulf of Mexico' bears more 'water vapor' that the air flowing over the 'Pacific Ocean'.

Explanation:

answer; in the united states the plains include the great plains of the west and the tail grass prairie to the south of the great lakes extending east to the appalachian plateau

i do believe that its called,(the segovia highlands); plz check first good luck;