Pre-PEC gremlins strike … AEMO notes ‘Suspect Lack Of Reserve Level 3 (LOR3) in the SA Region on 01/10/2026’

It’s almost certainly spurious, but worth noting (for interest sake) that we’ve passed the 12:30 Gate Closure #1 today and that the AEMO published MN145396 at 13:10 (NEM time) on Tuesday 29th September 2026 – looking forwards to Thursday 1st October 2026:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From : AEMO
To : NEMITWEB1
Creation Date : 29/09/2026 13:10:50

——————————————————————-

Notice ID : 145396
Notice Type ID : RESERVE NOTICE
Notice Type Description : LRC/LOR1/LOR2/LOR3
Issue Date : 29/09/2026
External Reference : PDPASA – Suspect Lack Of Reserve Level 3 (LOR3) in the SA Region on 01/10/2026

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

AEMO considers that there is a suspect Forecast LOR3 condition for the SA region for the following period:

[1.] From 0000 hrs 01/10/2026 to 0400 hrs 01/10/2026.

AEMO is currently investigating this LOR3 forecast condition to confirm whether they are valid.

Manager NEM Real Time Operations

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END OF REPORT
——————————————————————-‘

PS Subsequent update by AEMO

Did not have time to note this until Tuesday evening … but (as Karin noted in comment below) at 14:07 (NEM time) – approximately an hour after the above, AEMO noted MN145397 as follows:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From : AEMO
To : NEMITWEB1
Creation Date : 29/09/2026 14:07:57

——————————————————————-

Notice ID : 145397
Notice Type ID : RESERVE NOTICE
Notice Type Description : LRC/LOR1/LOR2/LOR3
Issue Date : 29/09/2026
External Reference : PDPASA – Update of the suspect Lack Of Reserve Level 3 (LOR3) condition in the SA Region on 01/10/2026

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

The suspect LOR3 condition advised in AEMO Electricity Market Notice No. 145396 has been reviewed and is now resolved.

No LOR3 condition is currently forecast for the SA region.

Manager NEM Real Time Operations

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END OF REPORT
——————————————————————-‘

We did not have time (or inclination, really) to explore the source of the error in any detail – given it seemed quite likely to be some mismatch between

• some data sets that start at midnight beginning the calendar day; and
• other data set that start at the 04:05 dispatch interval beginning the Market/Trading Day.