System Management is required under the market rules to issue dispatch advisory notifications in situations when:

• The system moves from a Normal Operating State to a High Risk or Emergency Operating State.
• The system is expected to reach a High Risk or Emergency Operating State.
• Communications to System Management or Information Technology systems required for normal operations are interrupted.
• Involuntary load shedding is occurring or is expected to occur.
• Committed generation at minimum loading is, or is expected to, exceed forecast load.
• Ancillary Service Requirements will not be fully met.
• Significant outages of generation transmission or customer equipment are occurring, or are expected to occur.
• Fuel supply on the Trading Day is significantly more restricted than usual, or fuel supply limitations mean it is not possible for some Market Participants to supply in accordance with their Resource Plans.
• System Management expects to issue a Dispatch Instruction Out of Merit.
• System Management expects to use LFAS Facilities other than in accordance with the LFAS Merit Order.
• There are other conditions that System Management reasonably believes are, or are expected to be impacting, the secure or reliable operation of the SWIS.

The current and historical list of dispatch advisories can be found in the WEM market data site.