Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Monday, September 25, 2023 at 7:22 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
9/23/2023No OFO in Effect
9/24/2023No OFO in Effect
9/25/2023No OFO in Effect
9/26/2023No OFO in Effect

When an OFO or EFO has been called, customers' supplies are required to be within the tolerance requirement of daily usage to avoid noncompliance penalties. The criteria for complying with an OFO or EFO are described here.

For additional information, please contact the PG&E Scheduling Helpline at (800) 343-4743.

While updates to the OFO Outlook are posted here, customers should use INSIDEtracc as their primary source for OFO notification and updated information. For specific end-use customer information, please see INSIDEtracc.

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System Inventory Status

Plan 3, posted 03:53 PM PT

Last updated for the Gas Day of 09/25/2023
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf9/22/20239/23/20239/24/20239/25/20239/26/20239/27/20239/28/2023
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300 4301
4250 4274
4200 421442004237
41504187
4100
4050 4092
4000
3950
3900
3850
3800
3750
3700
3650
3600
Within Operating Limits
Outside Operating Limits

All numbers are expressed in MMcf/day. When the forecast pipeline ending inventory exceeds the upper pipeline inventory operating limit or falls below the lower pipeline inventory operating limit, an OFO may be called to maintain the integrity and reliability of the gas transportation system.


Note: Historical data for yesterday is not available until mid-morning today.

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System Inventory Summary

Forecast
for
9/25/2023		Forecast
for
9/26/2023		Forecast
for
9/27/2023		Forecast
for
9/28/2023
Beginning Inventory4214420042374274
Ending Inventory4200423742744301
Inventory Change-14373727
 
Upper Limit4500440044004400
Difference*
(Upper Limit - Ending Inventory)		30016312699
 
Lower Limit4100400040004000
Difference*
(Ending Inventory - Lower Limit)		100237274301

*Forecast differences of less than 0 for the day after the current gas day (day 1) indicate that that PG&E may call an OFO to maintain pipeline integrity. Caution: This is PG&E's forecast of system inventory. Because market behavior and forecast loads can vary widely, this forecast may change significantly within the gas day and should therefore be used with caution. Forecasts further into the future are more likely to change than days closer to the current gas day e.g., the forecast for gas day 3 is subject to more change than the forecast for day 1.
All numbers are expressed in MMcf.
When an OFO has been called for the day after the current gas day (day 1), plans after the first plan of the gas day (posted by 8:00 AM) will often reflect changed market behavior and will show inventory projections within the established limits.

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PG&E Supply and Demand Forecast
(Net Physical Flows)

Plan 3, posted 03:53 PM PT

Last updated for the Gas Day of 09/25/2023
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
9/25/2023		Forecast
for
9/26/2023		Forecast
for
9/27/2023		Forecast
for
9/28/2023
COMPOSITE TEMPERATURE
Historical Average for current day: 68		66.666.466.265.9
Demand
On-System Demand1955194519451955
Off-System Deliveries
SoCal Gas (KRS)179198198198
Southwest Gas2222
Kern River GT - HDL20202020
Transmission Shrinkage36343430
Injection
PG&E Storage Injection (150 Maximum)*
Core, Market Center, and Pipeline Balancing		113666
Wild Goose Storage3422362360
Central Valley Storage0363636
Lodi Storage12041410
Gill Ranch Storage44444
TOTAL SYSTEM DEMAND2811252125212250
Supply
Interconnect Supply
Gas Transmission Northwest1594162216221400
Ruby427395395150
California Production16161616
SoCal Gas (KRS)-0-0-0-0
Kern River GT - HDL-0-0-0-0
Kern River GT - Daggett8121212
Southern Trails0000
El Paso Natural Gas557369369550
Transwestern153144144150
Withdrawal
PG&E Storage Withdrawal (724 Maximum)*
Core, Market Center, and Pipeline Balancing		20000
Wild Goose Storage-0-0-0-0
Central Valley Storage22-0-0-0
Lodi Storage-0-0-0-0
Gill Ranch Storage-0-0-0-0
TOTAL SYSTEM SUPPLY2797255825582278
INVENTORY CHANGE
(Supply - Demand)		-14373727
TOTAL CUSTOMER IMBALANCE34283018

*Maxima for injection and withdrawal apply to current day only.
Note: All numbers are expressed in MMcf/d. Differences may exist between these figures and those shown in PG&E's INSIDEtracc. This data is PG&E's best estimate using operational data.

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PG&E Storage Activity Forecast
(Scheduled Volumes)

Forecast
for
9/25/2023		Forecast
for
9/26/2023		Forecast
for
9/27/2023		Forecast
for
9/28/2023
Injection
PG&E Storage
Core and Market Center		65373737
Wild Goose Storage5584704700
Central Valley Storage36363636
Lodi Storage16586860
Gill Ranch Storage65252525
Pipeline Balancing Injection54000
Withdrawal
PG&E Storage
Core and Market Center		26303030
Wild Goose Storage2162352350
Central Valley Storage57-0-0-0
Lodi Storage4545450
Gill Ranch Storage32323232
Pipeline Balancing Withdrawal0000

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PG&E Recent Supply and Demand Data
(Net Physical Flows)

Actual
for
9/22/2023		Actual
for
9/23/2023		Actual
for
9/24/2023
COMPOSITE TEMPERATURE
Historical Average for current day: 68		64.864.464.7
Demand
On-System Demand200617441801
Off-System Deliveries
SoCal Gas (KRS)194191191
Southwest Gas222
Kern River GT - HDL202327
Transmission Shrinkage343535
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing		701530
Wild Goose Storage261420390
Central Valley Storage07368
Lodi Storage29115118
Gill Ranch Storage0318
TOTAL SYSTEM DEMAND261627882640
Supply
Interconnect Supply
Gas Transmission Northwest148815831574
Ruby431392394
California Production161515
SoCal Gas (KRS)-0-0-0
Kern River GT - HDL-0-0-0
Kern River GT - Daggett910
Southern Trails000
El Paso Natural Gas535548548
Transwestern163155160
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing		0070
Wild Goose Storage-0-0-0
Central Valley Storage22-0-0
Lodi Storage-0-0-0
Gill Ranch Storage6-0-0
TOTAL SYSTEM SUPPLY266826932762
INVENTORY CHANGE
(Supply - Demand)		52-95122
TOTAL CUSTOMER IMBALANCE362911

*Until yesterday's final figures are released, all numbers in this column will appear as 0.
Note: All numbers are expressed in MMcf/d. Differences may exist between these figures and those shown in PG&E's INSIDEtracc. This data is PG&E's best estimate using operational data.

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PG&E Recent Storage Activity
(Scheduled Volumes)

Actual
for
9/22/2023		Actual
for
9/23/2023		Actual
for
9/24/2023
Injection
PG&E Storage
Core and Market Center		677065
Wild Goose Storage480559556
Central Valley Storage357272
Lodi Storage73165166
Gill Ranch Storage575252
Pipeline Balancing Injection01100
Withdrawal
PG&E Storage
Core and Market Center		262626
Wild Goose Storage226148147
Central Valley Storage57-0-0
Lodi Storage454545
Gill Ranch Storage323232
Pipeline Balancing Withdrawal90140
Balancing Gas
Imbalance Gas in Storage**476947894753
PG&E Total Gas in Storage225792261022764

*Until yesterday's final figures are released, all numbers (expressed in MMcf/d) in this column will appear as 0.
** Suspension of pipeline balancing injection or withdrawal may occur if Imbalance Gas in Storage exceeds balancing inventory limits. If Imbalance Gas in Storage is greater than 5.0 Bcf, pipeline balancing injection may not be available. If Imbalance Gas in Storage is at or below 0.0 Bcf, balancing withdrawal will not be available.
The daily change of Imbalance Gas in Storage may not equal the daily Pipeline Balancing. This is because Pipeline Balancing is the entire system balancing required for the day and Imbalance Gas in Storage is only the Cumulative Imbalance portion of the entire system imbalance gas in storage. PG&E may include the entire system imbalance gas as the Imbalance Gas in Storage sometime in the future.

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