EUW, EUNE, and TR servers will be undergoing a network maintenance tonight starting at around 2 am GMT / 3 am CET. Servers are expected to be offline for around an hour and players should notice "increased stability and performance" once they pop back up.
Here is the Riot NOC ( Network Operations Center ) announcement:
"At 2am GMT on Wednesday, February 20th, we’ll be performing a scheduled maintenance to our European network that is supposed to take up to 1 hour.
- Goal: Infrastructural changes to the European network designed for heavy populated environments.
- Timeline: The maintenance is planned to start Wednesday Feb 20th at 2am GMT. All the environments will be shut down simultaneously.
- Player Impact: Platform outage for up to 1 hour. Queues will be disabled around 2 hours prior to the maintenance.
- Benefits: All shards using our EU infrastructure in Frankfurt (EUW, EUNE, TR) will benefit from increased stability and performance. The upgrade should also minimalize network issues during peak times."