PokeStop

They've thought of that, although the method to prevent it is a little rough. Basically whenever there's a local weather alert the weather is overridden by the "extreme" condition, and nothing has bonuses. Unfortunately for where I am, we've had a winter storm watch on since yesterday which triggers this, so we've barely gotten to play with the weather system at all. Admittedly roads were a little slippy last night, but they're fine in today's light flurries. Ah well. Boosted steel/ice types from the snow sure would be nice if this warning ever lifts, though.