Oh, what I meant by my previous comment was, a user will receive errors if they don\'t send this to the active channel. What I would do for /weatherm is something like this:

alias weatherm {
  if ($1 isnum) && ($len($1) == 5) && ($active ischan) {
  weather $1 | set %we.chan $chan }
  elseif ($active !ischan) { echo -a Invalid window. (Use a channel window) }
  else {
    echo -a Incorrect zip code format.
  }
}

Giving the user information on the proper use of the alias. Or you can have your socket echo the information into the active window instead of msging to %we.chan if the active window isn\'t a channel.