The article describes possible reason we receive Health Weight Low messages several times on mist UI.

This issue can because of interface flaps.

Check the SFP connected to the SRX for any errors.

It may not be SRX issue rather the issue with peer device as well. Check the interface / SFP on both SRX as well as on peer. 

As a proactive measure, we can try replacing SFP on both ends.