Next Day Operational Capacity Report

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Produced daily, the Next Day Operational Capacity Report provides the ISO's best estimate of the next day's expected capacity available to meet peak-hour electricity demand and reserve requirements - key parameters used to operate the power system reliably. For the weekly forecast, see the Seven-Day Capacity Forecast.

View the Next Day Operational Capacity Report below or Download a CSV file. Hover over items for an explanation.

Next Day Operational Capacity Report

1. Report Date
12/31/2025 15:51 EST

Today's Information

2. Operable Capacity Analysis			(MW)
A. Capacity Supply Obligation (CSO)			27,360
B. Capacity Additions EcoMax Bid > CSO			2,290
C. Generation Outages and Reductions (Planned + Forced)			1,552
	Planned Outages and Reductions	100
	Forced Outages and Reductions	1,452
D. Uncommitted Available Generation (non-fast-start)			6,262
E. DRR Capacity			146
F. Uncommitted Available DRR			12
G. Capacity Deliveries: Net Purchases = (-) Net Sales = (+)
	Highgate	-225
	NB	-199
	NECEC	0
	NYISO AC	-1,600
	NYISO CSC	50
	NYISO NNC	-149
	Phase 2	-229
	Net Deliveries		-2,352
H. Total Available Capacity (A+B-C-D+E-F-G)			24,322
I. Peak Load Forecast For Hour Ending 18			18,400
J. Total Operating Reserve Requirement			2,123
K. Capacity Required = I+J			20,523
L. Surplus = (+) Deficiency = (-) (H - K)			3,799
M. Replacement Reserve Requirement			180
N. Excess Commitment Surplus = (+) Deficiency = (-) (L - M)			3,619

3. Largest First Contingency	(MW)
____	1,249

4. Annual Maintenance Schedule (A.M.S.)	(MW)
Peak Load Exposure	19,390

5. Reserve Summary	(MW)
Ten Minute Reserve Requirement:	1,499
Ten Minute Reserve Estimate:	1,499
Thirty Minute Reserve Requirement:	624
Thirty Minute Reserve Estimate:	4,423
Expected Actions of OP 4:	0
Additional Capacity Available from OP 4 Actions:	0

6. Interchange Summary
	Transfer Limit In (MW)	Transfer Limit Out (MW)	Expected Contract (MW)
Highgate	-225	0	-225
NB	-1,000	200	-199
NECEC	-1,250	0	0
NYISO AC	-1,600	1,200	-1,600
NYISO CSC	-346	330	50
NYISO NNC	-160	160	-149
Phase 2	-2,000	1,200	-229

7. Weather Forecast Summary for the Peak Hour
CITY	CONDITIONS	WIND	HIGH TEMP (°F)
Boston	Mostly Cloudy	W-20	19
Hartford	Partly Cloudy	W-12	16

8. Units Committed to Meet Minimum Operating Reserve and Replacement Reserve Requirements	(MW)
0 Units	0

9. REPORT COMMENTS

Report Generated 12/31/2025 15:51 EST

Download a CSV file of this Next Day Operational Capacity Report .