Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Tuesday, July 27, 2021 at 7:22 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
7/25/2021No OFO in Effect
7/26/2021No OFO in Effect
7/27/2021No OFO in Effect
7/28/2021No 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 4, posted 09:43 PM PT

Last updated for the Gas Day of 07/27/2021
Next update expected by 5:30 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf7/24/20217/25/20217/26/20217/27/20217/28/20217/29/20217/30/2021
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
42504258 4283
4200 4229 4237
4150 4169
4100 41184119
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
7/27/2021
Forecast
for
7/28/2021
Forecast
for
7/29/2021
Forecast
for
7/30/2021
Beginning Inventory4283425341094090
Ending Inventory4253410940904051
Inventory Change-30-144-19-39
 
Upper Limit4400450045004400
Difference*
(Upper Limit - Ending Inventory)
147391410349
 
Lower Limit4000410041004000
Difference*
(Ending Inventory - Lower Limit)
2539-1051

*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 4, posted 09:43 PM PT

Last updated for the Gas Day of 07/27/2021
Next update expected by 5:30 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
7/27/2021
Forecast
for
7/28/2021
Forecast
for
7/29/2021
Forecast
for
7/30/2021
COMPOSITE TEMPERATURE
Historical Average for current day: 70.7
74.375.575.775
Demand
On-System Demand2310239024152290
Off-System Deliveries
SoCal Gas (KRS)388426426426
Southwest Gas3333
Kern River GT - HDL0000
Transmission Shrinkage28282828
Injection
PG&E Storage Injection (315 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage20000
Lodi Storage0000
Gill Ranch Storage0000
TOTAL SYSTEM DEMAND2748284728722747
Supply
Interconnect Supply
Gas Transmission Northwest1401138513851385
Ruby396356356356
California Production28282828
SoCal Gas (KRS)-0-0-0-0
Kern River GT - HDL-0-0-0-0
Kern River GT - Daggett0000
Southern Trails0000
El Paso Natural Gas272367367367
Transwestern217224224224
Withdrawal
PG&E Storage Withdrawal (391 Maximum)*
Core, Market Center, and Pipeline Balancing
20192020
Wild Goose Storage141233275200
Central Valley Storage-0303030
Lodi Storage59121212
Gill Ranch Storage169125125126
TOTAL SYSTEM SUPPLY2703277928212748
INVENTORY CHANGE
(Supply - Demand)
-46-68-511
TOTAL CUSTOMER IMBALANCE-70-75-59-9

*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
7/27/2021
Forecast
for
7/28/2021
Forecast
for
7/29/2021
Forecast
for
7/30/2021
Injection
PG&E Storage
Core and Market Center
121676767
Wild Goose Storage43824500
Central Valley Storage49000
Lodi Storage17242424
Gill Ranch Storage3444
Pipeline Balancing Injection0110
Withdrawal
PG&E Storage
Core and Market Center
159150150150
Wild Goose Storage599478275200
Central Valley Storage30303030
Lodi Storage77363636
Gill Ranch Storage121686868
Pipeline Balancing Withdrawal36001

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

Actual
for
7/24/2021
Actual
for
7/25/2021
Actual
for
7/26/2021
COMPOSITE TEMPERATURE
Historical Average for current day: 70.7
71.571.670.4
Demand
On-System Demand211420002306
Off-System Deliveries
SoCal Gas (KRS)415409405
Southwest Gas333
Kern River GT - HDL000
Transmission Shrinkage272728
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
01110
Wild Goose Storage000
Central Valley Storage0160
Lodi Storage484640
Gill Ranch Storage000
TOTAL SYSTEM DEMAND260726122781
Supply
Interconnect Supply
Gas Transmission Northwest145314161480
Ruby344338359
California Production292829
SoCal Gas (KRS)-0-0-0
Kern River GT - HDL-0-0-0
Kern River GT - Daggett000
Southern Trails000
El Paso Natural Gas248250253
Transwestern237225226
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
1088
Wild Goose Storage255300250
Central Valley Storage19-033
Lodi Storage-0-0-0
Gill Ranch Storage3426116
TOTAL SYSTEM SUPPLY262025832835
INVENTORY CHANGE
(Supply - Demand)
13-2954
TOTAL CUSTOMER IMBALANCE17103-141

*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
7/24/2021
Actual
for
7/25/2021
Actual
for
7/26/2021
Injection
PG&E Storage
Core and Market Center
183182149
Wild Goose Storage301252329
Central Valley Storage0490
Lodi Storage766667
Gill Ranch Storage666
Pipeline Balancing Injection41160
Withdrawal
PG&E Storage
Core and Market Center
150149150
Wild Goose Storage551551567
Central Valley Storage303029
Lodi Storage262626
Gill Ranch Storage706968
Pipeline Balancing Withdrawal00141
Balancing Gas
Imbalance Gas in Storage**276328342695
PG&E Total Gas in Storage195531959019739

*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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