I started up a slack channel if anyone here is interested in real-time chat, especially considering how fast-moving this event is looking likely to be.
https://join.slack.com/t/severe-weather-group/shared_invite/enQtNjMzNjExNjYwMjI1LWJmNWNmYzM4YzNiYTY1NDMwNTdiZTgwYTkxMzVjZjM4MWMyZWJmYTA0OTdmYzMzMGY0ZjQxMGE5NDBmMDUzMTY