I first want to say thanks for the great script, I've been using it in a friends & family irc channel for a while now, and haven't had any issues. This unfortunately stopped today, as the script is no longer responding to any of the commands, except for help and remove. There seems to be no response for register, weather, current, forecast, or alerts.
It appears to be still working on my end. Might be either a limit on your Hash. or another script interfering with weather.