The dirt track is listed as Fast and the Turf course is listed as Firm for Thursday's nine-race card at Gulfstream Park.
First post time is 12:00 p.m. at the Hallandale Beach, Fla., track.
The Weather Channel forecast is that the chance of rain will increase from 15 percent to 35 percent during racing hours.
The Rainbow 6 carryover, now twelve race days old, is $592,479. That 20 cent per combination-only bet will be on races four to nine, with the sequence scheduled to start at 1:40 p.m. Gulfstream has guaranteed that the jackpot pool will be at least $850,000 if there is just one ticket with all six winning horses.
This Saturday, Sept. 26, will be the biggest stakes day of the spring/summer meet. Gulfstream will have six stakes races--topped by the two closing legs in the annual Florida Sire Stakes series for 2-year-olds.
Both races have $400,000 purses and are 1 1/16 miles on dirt.
In the males division, unbeaten Breeze on By heads the field in the In Reality--which has a nine-horse field. Breeze on By is going for a series sweep, following his wins in the $100,000 Dr. Fager at six furlongs and in the $200,000 Affirmed at seven furlongs.
In the fillies division's My Dear Girl, the field includes the winners of this year's first two FSS races. They are Go Jo Jo Go, who won the six-furlong Desert Vixen, and Princess Secret, who won the seven-furlong Susan's Girl.
This Sunday Sept. 27, Gulfstream will have a mandatory payout on its Rainbow 6 jackpot--regardless of the number of tickets with the winners of all six Rainbow 6 races.
The jackpot consists of the entire Rainbow 6 carryover plus 80 percent of the day's new Rainbow 6 bets. There is a 20 percent takeout.
Gulfstream usually pays out that jackpot only if there is just one ticket with all six winners. On most days with multiple winning tickets, the carryover grows by 24 percent. The current carryover has built up over twelve days.
A Florida law prohibits Gulfstream from extending any carryovers into the Gulfstream Park West meet that will begin on Oct. 3.
So, if the carryover keeps growing into next Sunday it could be as high as $1 million, with the prospect that as much as $5 million will be bet on the Rainbow 6.
It is a situation where many bettors who have not been playing the Rainbow 6 will jump in, hoping to win some of the money that others have lost.