Not unexpected, models often don’t pick up upper air disturbances in the upper flow
Asides
Update
The Tropical Prediction Center has moved the expected track of hurricane Joaquin westward and has delayed the arrival of the storm (then expected to be a tropical storm) until Monday in our area.
The majority of the experimental tropical models, though, keep the track even more westward and southward, into the Carolinas and then Kentucky. Stay tuned.