There is an upper low in the SW GOM and though inverted it does extend to a weak upper low/open wave off the coast of North Florida that is barely noted on water vapor imagery to the NE and N to the developing long wave trough along the Eastern US with an upper low over Canada progged to move Southeast to the Great Lakes area and deepen and cutoff there; I expect the track to be adjusted a hair to the right...north but I don't see anything in the models to suggest that Ernesto will gain enough latitude to be turned north; the upper low over the SW GOM is progged to move west to inland Mexico in 48 hours and an upper (200 mb) ridge currently to the SW of Ernesto is expected to be out ahead of Ernesto backing the storm back to the west and west-southwest. Currently there is an upper ridge directly over the system but strong 30 knot wind shear from the north less than 200 miles to the northeast of the center and 30 knots from the south near the NW shore of the Yucatan peninsula; both indicative of upper lows over the SW GOM and central tropical Atlantic Ocean.