would be meeting the relay closer to Nome than had originally been planned. After 3 days and , he came in sight of another relay musher, Henry Ivanoff, but did not realise it. Seppala saw the musher stopped on the trail and having trouble with his dogs, but did not intend to stop and be delayed. Ivanoff had to run after Seppala as he raced past, shouting, "The serum! The serum! I have it here!". When the serum passed to Seppala, night was falling and a powerful low-pressure system was moving towards the trail from the Gulf of Alaska. Seppala had to decide whether to risk Norton Sound in high winds in the dark, when he could not see or hear potential warning signs from the ice. However, as going around the ice meant slowing the delivery of the serum by a full day, he chose to go across. While he raced to the roadhouse at Isaac's Point on the opposite shore, gale-force winds drove the windchill to an estimated from a real temperature of only . When he arrived there at 8 pm, his dogs were exhausted; they had run that day, much of it against the wind and in brutal cold. However, they could only afford a short rest, and set out again at 2 am. The next day, the gale had intensified into a severe blizzard, with blinding snow and winds of at least . Seppala continued the trail across Norton Sound. This meant avoiding rocky cliffs along the shore, but it also exposed him and his team to the dangers of the Sound. Conditions on the ice were perilous, with sudden soft spots in the ice underfoot and outright open water sometimes only a few feet away. Only a few hours after they had crossed it, the ice broke up altogether and drifted out to sea. With Norton Sound behind them, Seppala and his team now faced the final challenge of the trail—climbing an ridge formation that led to the summit of Little McKinley. The trail here was exposed and the steep grade grueling for the dogs, who were sleep-deprived and had already raced over the previous 4.5 days. However, at 3 P.M. that day, Seppala and his team arrived at Golovin and handed over the serum to the next musher. The serum was now only from Nome. Indeed, it arrived there the next day, Monday,