NOTAMs

Notices to Airmen (NOTAM) cover short duration or temporary changes or short notice permanent changes. They contain information concerning the establishment, condition or change in any aeronautical facility, service, procedure or hazard, the timely knowledge of which is essential to personnel concerned with flight operations. As part of the service, Trigger NOTAM are used to inform users of operationally significant information due to be incorporated in an AIP amendment or SUP.

There are a number of web sites that display NOTAMs in various formats - some are easier to use than others, some require you to register, most are free.