Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Tuesday, October 17, 2017 at 5:22 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
10/15/2017No OFO in Effect
10/16/2017No OFO in Effect
10/17/2017System Wide OFO in Effect7% Stage 1 at $ .25 /Dth Low Inventory
10/18/2017System Wide OFO in Effect7% Stage 1 at $ .25 /Dth Low Inventory

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 2, posted 12:57 PM PT

Last updated for the Gas Day of 10/17/2017
Next update expected by 4:30 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf10/14/201710/15/201710/16/201710/17/201710/18/201710/19/201710/20/2017
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250
4200
4150
41004136 41474124
4050 4082 4097
4000 40054006
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
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
Forecast
for
10/20/2017
Beginning Inventory4005400641474124
Ending Inventory4006414741244097
Inventory Change1141-23-27
 
Upper Limit4300430043004300
Difference*
(Upper Limit - Ending Inventory)
294153176203
 
Lower Limit3900390039003900
Difference*
(Ending Inventory - Lower Limit)
106247224197

*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 2, posted 12:57 PM PT

Last updated for the Gas Day of 10/17/2017
Next update expected by 4:30 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
Forecast
for
10/20/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 63.4
6462.360.557
Demand
On-System Demand2080201020302035
Off-System Deliveries
SoCal Gas (KRS)286293293293
Southwest Gas8888
Kern River GT - HDL99102102102
Transmission Shrinkage26262626
Injection
PG&E Storage Injection (311 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage06600
Central Valley Storage49000
Lodi Storage0000
Gill Ranch Storage0000
TOTAL SYSTEM DEMAND2548250624602465
Supply
Interconnect Supply
Gas Transmission Northwest957948948948
Ruby567541541541
California Production31313131
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett4999
Southern Trails34353535
El Paso Natural Gas182255255255
Transwestern384376376376
Withdrawal
PG&E Storage Withdrawal (712 Maximum)*
Core, Market Center, and Pipeline Balancing
2012191010
Wild Goose Storage10504848
Central Valley Storage0252525
Lodi Storage83198149149
Gill Ranch Storage2101010
TOTAL SYSTEM SUPPLY2550264724372437
INVENTORY CHANGE
(Supply - Demand)
1141-23-27
TOTAL CUSTOMER IMBALANCE14148-16-21

*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
10/17/2017
Forecast
for
10/18/2017
Forecast
for
10/19/2017
Forecast
for
10/20/2017
Injection
PG&E Storage
Core and Market Center
255246254254
Wild Goose Storage49449700
Central Valley Storage78555
Lodi Storage120500
Gill Ranch Storage6555
Pipeline Balancing Injection0000
Withdrawal
PG&E Storage
Core and Market Center
456464264264
Wild Goose Storage5984314848
Central Valley Storage30303030
Lodi Storage203203149149
Gill Ranch Storage9141414
Pipeline Balancing Withdrawal0000

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

Actual
for
10/14/2017
Actual
for
10/15/2017
Actual
for
10/16/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 63.4
62.763.764.5
Demand
On-System Demand160417711948
Off-System Deliveries
SoCal Gas (KRS)285320295
Southwest Gas1099
Kern River GT - HDL50093
Transmission Shrinkage272726
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
225225100
Wild Goose Storage000
Central Valley Storage114117117
Lodi Storage000
Gill Ranch Storage300
TOTAL SYSTEM DEMAND231824702590
Supply
Interconnect Supply
Gas Transmission Northwest974931935
Ruby653645654
California Production333636
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett400
Southern Trails293237
El Paso Natural Gas190155161
Transwestern366361360
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage6565140
Central Valley Storage000
Lodi Storage95191190
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY240924162513
INVENTORY CHANGE
(Supply - Demand)
91-54-77
TOTAL CUSTOMER IMBALANCE15028-100

*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
10/14/2017
Actual
for
10/15/2017
Actual
for
10/16/2017
Injection
PG&E Storage
Core and Market Center
473474464
Wild Goose Storage377386387
Central Valley Storage147147147
Lodi Storage606060
Gill Ranch Storage121212
Pipeline Balancing Injection000
Withdrawal
PG&E Storage
Core and Market Center
253252302
Wild Goose Storage441452529
Central Valley Storage303030
Lodi Storage155251251
Gill Ranch Storage005
Pipeline Balancing Withdrawal2361
Balancing Gas
Imbalance Gas in Storage**446945084402
PG&E Total Gas in Storage944859470994934

*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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