Great Britain's Pascoe has been in fine form across the pond and carried that over the Thursday as she recorded two second-place finishes.
This has her in second heading into Friday's final day of racing, level on 16 points with Canadian Bruce Millar.
And with Canada's Allan Leibel and Bjornar Erikstad of Norway both sitting just a point behind, Pascoe will be hoping she has what it takes to secure a medal.
Elliot Carney's victory in the last RS:X men's race was the highlight for Britain's windsurfers on day four.
With both the men's and women's events heading into the quarter-final stage on Thursday, any scores the top ten windsurfers had accrued previously were wiped clean.
And London 2012 champion Dorian Van Rijssbelberghe from Holland made the most of the clean slate as recorded finishes of first, second and third to take a four-point lead.
Hong Kong's Ho Tsun Leung sits second with Spain's Ivan Pastor in third, Great Britain's Nick Dempsey two places further back after finishes of fifth, eighth and fourth.
Carney endured a rollercoaster ride in Miami as his quarter-final stage opened in disastrous fashion after retiring from the opening race, before improving to ninth and then tasting victory in the final race of the day.
There was better news for Bryony Shaw in the women's event as she sits third following two finishes of second and an eighth, while Izzy Hamilton finds herself sitting eighth.
Elsewhere, in the laser class Alex Mills Barton continues to lead to way for Britain as he sits tenth, with Matt Reid 30th and Jack Wetherell one place further back.
© Sportsbeat 2013