"He won that race as a two-year-old on a heavy track against just two rivals but he never really handled it, he just got there on ability," warns Latta.
"And the last time he raced on a wet track at Wellington (last start) even though he won on a dead6 Johnathan (Parkes, jockey) said he didn't really handle it either.
"So while his form in the wet might look good I'm worried to be honest."
Latta's concerns doubled as the rain came down because Sir Nate has the ace draw, which looked a blessing on Wednesday but could be a handicap by the time the three-year-olds jump from the 1600m start point today.
Perhaps her only solace is most of her rival trainers feel the same.
Of those well in the market favourite Madison County has won on a slow track, albeit in a maiden race to end his juvenile season in April.
He did race slightly dour in a sit-sprint Sarten Memorial at Te Rapa last start and that coupled with his charging Hawkes Bay Guineas win suggests the stamina test of a wet track 1600m shouldn't bother him.
So he still deserves favourite even though punters might be expected to rally for the unbeaten Dawn Patrol, both of whose wins have come in dazzling fashion on soft tracks, albeit the last one at Matamata on a surface which may have been better than officially listed.
He is still very raw for a 2000 Guineas but the pieces of the puzzle are falling together nicely for him and it would surprise to see his $6 overnight quote remain should the track not improve.
While the wet track has thrown a spanner into the works of the first classic of the season it will make punting tricky all day and could raise some real discrepancies between first day form and what unfolds later in Cup week, when Riccarton race again on Wednesday and then next Saturday.
If Latta and plenty of her rival Guineas trainers are unsure what to expect Cambridge horseman Stephen Marsh is almost dreading today's staying feature, the $75,000 Metropolitan with favourite Felaar.
The promising stayer was set for next Saturday's New Zealand Cup and today's race was the obvious chance to boost his ranking from 23rd into a guaranteed Cup spot. Until the rain came.
"He hates it," says Marsh.
"He just doesn't seem to let go in the wet at all but we have to start him because he is outside the 18 for the Cup next week, which is the main aim.
"So while like a lot of other people I am hoping the track improves if it doesn't we could be in trouble.
"The one thing we do have going for us is a light weight and even if he can run in three it helps us get into the Cup.
"But I couldn't tip him with any confidence now."
2000 GUINEAS DAY
• A likely slow track has thrown markets for today's Riccarton features into confusion.
• Dawn Patrol looks one of the potential big winners from the persistent rain in Canterbury yesterday.
• The biggest track warning of the day comes from Felaar's trainer Stephen Marsh.
