Onotice
From Scriptwiki
This and the /omsg command sends the specified message to all channel ops on a channel.
/onotice [#channel] <message>
You must be a channel operator to use these commands. If the #channel isn't specified, then the current channel is used.
Example
/onotice Good night staff!
Sends the message Good night staff! via notice to others ops on the active channel.
/onotice #help.script We love Dana!
Sends the message We love Dana! via notice to other ops on #help.script.