Extreme weather warning is BS
Yesterday was a nice cloudy day and the weather system worked. Today it is expected to have light to medium snow and I was looking forward to catch high level swinubs and jynx. It is not even below freezing now and I get the extreme weather warning and only trash spawns. If they don't fix it, this will be the standard here in new England for the next 4 month.
Answers
I was thinking the same thing. I can see why the developers would want to include an "extreme weather" setting to keep players from venturing out to catch pokemon in a hurricane, tornado, or blizzard. The problem is, a blizzard isn't being predicted, just some snowfall.
Unfortunately, if this "extreme" thing is simply tied to the national weather service alerts, you can expect it to stay that way until at least 7 AM tomorrow.
EDIT: Reading the post from Southern California, it sounds like whenever the local branch of the weather service issues an alert, the game will declare your weather "extreme". So this might not just happen for snow or fires in the area going forward, but for flash flood warnings, etc.