The whole "weatherman finds the snow" thing seemed oddly like it was written for people who do not live in southern California and think of it as universally warm. This is extra weird because the writers almost certainly all live in LA. There are a bunch of places within a couple hours driving from LA where it regularly snows in winter. Even if it weren't snowing that day, they could probably find somewhere with some on the ground already. He didn't need to pick somewhere expecting a big storm - and if he thought his forecast were accurate why would he want to drive into it? I was sitting there thinking "don't drive towards a storm!" It's also not unusual for Lake Arrowhead to be in the 50s during the day but 20s overnight this time of year. He'd know that. If he expected the precipitation at night, he'd know it'd be much colder by then. So was he expecting to be freezing during the day too and was just wrong on that front? They played the "its too warm" scenes as though it were in the high 70s. It could've been that hot but it'd be very weird for Will to be 40 degrees off when he seemed to be predicting it a couple days out. It's not entirely out of the realm of possibility for the temp to fluctuate that much one day to the next - but we'd see that in the 10 day forecast, not be surprised by it day of. Again, if he's targeting the location, why would he pick somewhere that was going to potentially have a random really hot day right adjacent to a snowstorm when he's trying to guarantee snow? It would've landed better if the warmth when they arrived didn't deter Will and he kept insisting on random measures and namedropping facts that the rest wouldn't understand to explain why he wasn't wrong to predict snow, instead of arriving, finding it warm and just sort shrugging.