Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Sunday, April 23, 2017 at 7:16 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
4/21/2017No OFO in Effect
4/22/2017No OFO in Effect
4/23/2017No OFO in Effect
4/24/2017No 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 03:59 PM PT

Last updated for the Gas Day of 04/23/2017
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
MMcf4/20/20174/21/20174/22/20174/23/20174/24/20174/25/20174/26/2017
4750
4700
4650
4600
4550
4500
4450
4400
4350 4353
4300 43394324
42504269
4200
4150
4100
4050 4050
4000 4001
3950 3977
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
4/23/2017
Forecast
for
4/24/2017
Forecast
for
4/25/2017
Forecast
for
4/26/2017
Beginning Inventory4324435340504001
Ending Inventory4353405040013977
Inventory Change29-303-49-24
 
Upper Limit4350435043504350
Difference*
(Upper Limit - Ending Inventory)
-3300349373
 
Lower Limit3900390039003900
Difference*
(Ending Inventory - Lower Limit)
45315010177

*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 03:59 PM PT

Last updated for the Gas Day of 04/23/2017
Next update expected by 11:00 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
4/23/2017
Forecast
for
4/24/2017
Forecast
for
4/25/2017
Forecast
for
4/26/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 58.9
59.45860.161.6
Demand
On-System Demand1355160015401515
Off-System Deliveries
SoCal Gas (KRS)158161161161
Southwest Gas8888
Kern River GT - HDL0000
Transmission Shrinkage28272727
Injection
PG&E Storage Injection (440 Maximum)*
Core, Market Center, and Pipeline Balancing
242323128128
Wild Goose Storage243206206206
Central Valley Storage49494949
Lodi Storage114133133133
Gill Ranch Storage96404040
TOTAL SYSTEM DEMAND2293254722922267
Supply
Interconnect Supply
Gas Transmission Northwest1429139213921392
Ruby456486486486
California Production38383838
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett56101010
Southern Trails0000
El Paso Natural Gas202175175175
Transwestern142142142142
Withdrawal
PG&E Storage Withdrawal (935 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage0000
Lodi Storage0000
Gill Ranch Storage0000
TOTAL SYSTEM SUPPLY2323224322432243
INVENTORY CHANGE
(Supply - Demand)
29-303-49-24
TOTAL CUSTOMER IMBALANCE80-277-149-124

*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
4/23/2017
Forecast
for
4/24/2017
Forecast
for
4/25/2017
Forecast
for
4/26/2017
Injection
PG&E Storage
Core and Market Center
442441359359
Wild Goose Storage639631631631
Central Valley Storage106106106106
Lodi Storage142162162162
Gill Ranch Storage40404040
Pipeline Balancing Injection103500
Withdrawal
PG&E Storage
Core and Market Center
154154155155
Wild Goose Storage395424424424
Central Valley Storage57575757
Lodi Storage28282828
Gill Ranch Storage0000
Pipeline Balancing Withdrawal007575

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

Actual
for
4/20/2017
Actual
for
4/21/2017
Actual
for
4/22/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 58.9
59.963.259.9
Demand
On-System Demand148914091289
Off-System Deliveries
SoCal Gas (KRS)174196185
Southwest Gas766
Kern River GT - HDL000
Transmission Shrinkage272728
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
289341350
Wild Goose Storage085214
Central Valley Storage0049
Lodi Storage380123
Gill Ranch Storage828787
TOTAL SYSTEM DEMAND210521512330
Supply
Interconnect Supply
Gas Transmission Northwest132013971419
Ruby492420485
California Production272525
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett607530
Southern Trails000
El Paso Natural Gas187195214
Transwestern120109142
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage5000
Central Valley Storage000
Lodi Storage000
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY225522212315
INVENTORY CHANGE
(Supply - Demand)
15070-15
TOTAL CUSTOMER IMBALANCE247183125

*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
4/20/2017
Actual
for
4/21/2017
Actual
for
4/22/2017
Injection
PG&E Storage
Core and Market Center
425438443
Wild Goose Storage406405639
Central Valley Storage5858106
Lodi Storage7526153
Gill Ranch Storage323641
Pipeline Balancing Injection75113116
Withdrawal
PG&E Storage
Core and Market Center
154154154
Wild Goose Storage463326424
Central Valley Storage575757
Lodi Storage282828
Gill Ranch Storage000
Pipeline Balancing Withdrawal000
Balancing Gas
Imbalance Gas in Storage**296731843330
PG&E Total Gas in Storage725057285173248

*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 4.040 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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