I don't remember the Weaver being closed due to high water levels before.
Notice AlertWeaver Navigation Location: Weaver Navigation
Tuesday 31 March 2015 09:30 until further notice
Type: Navigation Closure Reason: Information Original message:For safety reasons, with immediate effect the Weaver Navigation is CLOSED until further notice due to high river levels and strong river flows.
You can view this notice and its map online here: https://canalrivertrust.org.uk/notice/2709/weaver-navigation
You can find all notices at the url below: https://canalrivertrust.org.uk/notices