Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Tuesday, September 22, 2020 at 7:32 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
9/20/2020No OFO in Effect
9/21/2020No OFO in Effect
9/22/2020No OFO in Effect
9/23/2020No 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 1, posted 08:23 AM PT

Last updated for the Gas Day of 09/22/2020
Next update expected by 1:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf9/19/20209/20/20209/21/20209/22/20209/23/20209/24/20209/25/2020
4750
4700
4650
4600
4550
4500
4450 4476
4400 4400
4350
4300 4305
4250
4200 42134200
415041574190
4100
4050
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
9/22/2020
Forecast
for
9/23/2020
Forecast
for
9/24/2020
Forecast
for
9/25/2020
Beginning Inventory4213420043054400
Ending Inventory4200430544004476
Inventory Change-131059576
 
Upper Limit4400440044004400
Difference*
(Upper Limit - Ending Inventory)
200950-76
 
Lower Limit4000400040004000
Difference*
(Ending Inventory - Lower Limit)
200305400476

*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 1, posted 08:23 AM PT

Last updated for the Gas Day of 09/22/2020
Next update expected by 1:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
9/22/2020
Forecast
for
9/23/2020
Forecast
for
9/24/2020
Forecast
for
9/25/2020
COMPOSITE TEMPERATURE
Historical Average for current day: 68.4
69.169.669.270.1
Demand
On-System Demand1805181018101760
Off-System Deliveries
SoCal Gas (KRS)117117117117
Southwest Gas3333
Kern River GT - HDL63393939
Transmission Shrinkage29303030
Injection
PG&E Storage Injection (320 Maximum)*
Core, Market Center, and Pipeline Balancing
2231166659
Wild Goose Storage131193193193
Central Valley Storage45454545
Lodi Storage0025100
Gill Ranch Storage53535353
TOTAL SYSTEM DEMAND2469240623812399
Supply
Interconnect Supply
Gas Transmission Northwest1294129412941294
Ruby503558558558
California Production30303030
SoCal Gas (KRS)-0-0-0-0
Kern River GT - HDL-0-0-0-0
Kern River GT - Daggett3333
Southern Trails0000
El Paso Natural Gas382382382382
Transwestern209209209209
Withdrawal
PG&E Storage Withdrawal (865 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage-0-0-0-0
Central Valley Storage-0-0-0-0
Lodi Storage3535-0-0
Gill Ranch Storage-0-0-0-0
TOTAL SYSTEM SUPPLY2456251124762476
INVENTORY CHANGE
(Supply - Demand)
-131059576
TOTAL CUSTOMER IMBALANCE68928365

*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
9/22/2020
Forecast
for
9/23/2020
Forecast
for
9/24/2020
Forecast
for
9/25/2020
Injection
PG&E Storage
Core and Market Center
232222172164
Wild Goose Storage320193193193
Central Valley Storage60606060
Lodi Storage454525100
Gill Ranch Storage50505050
Pipeline Balancing Injection96000
Withdrawal
PG&E Storage
Core and Market Center
105106106106
Wild Goose Storage190000
Central Valley Storage15151515
Lodi Storage808000
Gill Ranch Storage6666
Pipeline Balancing Withdrawal0000

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

Actual
for
9/19/2020
Actual
for
9/20/2020
Actual
for
9/21/2020
COMPOSITE TEMPERATURE
Historical Average for current day: 68.4
69.771.970.9
Demand
On-System Demand183217111817
Off-System Deliveries
SoCal Gas (KRS)133121132
Southwest Gas333
Kern River GT - HDL06172
Transmission Shrinkage303030
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
4653136
Wild Goose Storage300305220
Central Valley Storage26260
Lodi Storage155150108
Gill Ranch Storage10911471
TOTAL SYSTEM DEMAND263525762588
Supply
Interconnect Supply
Gas Transmission Northwest144814491406
Ruby532533524
California Production313131
SoCal Gas (KRS)-0-0-0
Kern River GT - HDL-0-0-0
Kern River GT - Daggett000
Southern Trails000
El Paso Natural Gas363368369
Transwestern227228228
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage-0-0-0
Central Valley Storage-0-052
Lodi Storage-0-0-0
Gill Ranch Storage-0-0-0
TOTAL SYSTEM SUPPLY260126092611
INVENTORY CHANGE
(Supply - Demand)
-343323
TOTAL CUSTOMER IMBALANCE-155-522

*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
9/19/2020
Actual
for
9/20/2020
Actual
for
9/21/2020
Injection
PG&E Storage
Core and Market Center
230230232
Wild Goose Storage404416410
Central Valley Storage414111
Lodi Storage178178162
Gill Ranch Storage10310371
Pipeline Balancing Injection0012
Withdrawal
PG&E Storage
Core and Market Center
106106108
Wild Goose Storage108127177
Central Valley Storage151564
Lodi Storage262651
Gill Ranch Storage000
Pipeline Balancing Withdrawal78710
Balancing Gas
Imbalance Gas in Storage**245524022370
PG&E Total Gas in Storage778157786177915

*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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