Storm prediction center - current mesoscale discussions, Current mesoscale discussions updated: thu may 24 06:57:04 utc 2018 no mesoscale discussions are currently in effect. most recently issued mesoscale discussion #0507.. Signup - swapsmut., Registering an account opens up all the features our website has to offer. becoming a member is completely free, so why not register today! 490,269 members sharing. Http://maps.google..tw/, .