Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Sunday, July 23, 2017 at 7:22 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
7/21/2017No OFO in Effect
7/22/2017System Wide OFO in Effect5% Stage 1 at $ .25 /Dth High Inventory
7/23/2017No OFO in Effect
7/24/2017No 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 2, posted 12:58 PM PT

Last updated for the Gas Day of 07/23/2017
Next update expected by 3:30 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf7/20/20177/21/20177/22/20177/23/20177/24/20177/25/20177/26/2017
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250
4200
4150 4183
41004123
4050
4000
3950 3987
3900 3940 3905
3850 3871
3800 3837
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
7/23/2017
Forecast
for
7/24/2017
Forecast
for
7/25/2017
Forecast
for
7/26/2017
Beginning Inventory3987394038373871
Ending Inventory3940383738713905
Inventory Change-47-1033434
 
Upper Limit4200420042004200
Difference*
(Upper Limit - Ending Inventory)
260363329295
 
Lower Limit3800380038003800
Difference*
(Ending Inventory - Lower Limit)
1403771105

*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 12:58 PM PT

Last updated for the Gas Day of 07/23/2017
Next update expected by 3:30 PM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
7/23/2017
Forecast
for
7/24/2017
Forecast
for
7/25/2017
Forecast
for
7/26/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 70.7
75.871.97273.5
Demand
On-System Demand1635192017551755
Off-System Deliveries
SoCal Gas (KRS)303332332332
Southwest Gas8888
Kern River GT - HDL24242424
Transmission Shrinkage26262626
Injection
PG&E Storage Injection (229 Maximum)*
Core, Market Center, and Pipeline Balancing
137635252
Wild Goose Storage69822
Central Valley Storage0000
Lodi Storage0000
Gill Ranch Storage7101414
TOTAL SYSTEM DEMAND2272238222142214
Supply
Interconnect Supply
Gas Transmission Northwest1226127212461246
Ruby617624617617
California Production28282828
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett3333
Southern Trails0000
El Paso Natural Gas201200203203
Transwestern74697474
Withdrawal
PG&E Storage Withdrawal (960 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage0000
Lodi Storage76767676
Gill Ranch Storage0600
TOTAL SYSTEM SUPPLY2225227822482248
INVENTORY CHANGE
(Supply - Demand)
-47-1033434
TOTAL CUSTOMER IMBALANCE4-177-30-30

*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
7/23/2017
Forecast
for
7/24/2017
Forecast
for
7/25/2017
Forecast
for
7/26/2017
Injection
PG&E Storage
Core and Market Center
258258212212
Wild Goose Storage415354349349
Central Valley Storage0000
Lodi Storage1111
Gill Ranch Storage33133333
Pipeline Balancing Injection50000
Withdrawal
PG&E Storage
Core and Market Center
1161209898
Wild Goose Storage346346346346
Central Valley Storage0000
Lodi Storage77777777
Gill Ranch Storage19191919
Pipeline Balancing Withdrawal0756363

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

Actual
for
7/20/2017
Actual
for
7/21/2017
Actual
for
7/22/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 70.7
70.471.477.6
Demand
On-System Demand168317241678
Off-System Deliveries
SoCal Gas (KRS)352360316
Southwest Gas787
Kern River GT - HDL212640
Transmission Shrinkage262726
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
112126154
Wild Goose Storage0050
Central Valley Storage000
Lodi Storage000
Gill Ranch Storage575674
TOTAL SYSTEM DEMAND225823262346
Supply
Interconnect Supply
Gas Transmission Northwest140012811193
Ruby487602616
California Production232119
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett33354
Southern Trails000
El Paso Natural Gas186177198
Transwestern709092
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage000
Central Valley Storage000
Lodi Storage14618028
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY234423862150
INVENTORY CHANGE
(Supply - Demand)
8660-196
TOTAL CUSTOMER IMBALANCE171155-63

*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
7/20/2017
Actual
for
7/21/2017
Actual
for
7/22/2017
Injection
PG&E Storage
Core and Market Center
232241259
Wild Goose Storage437416411
Central Valley Storage000
Lodi Storage1144
Gill Ranch Storage11735
Pipeline Balancing Injection686868
Withdrawal
PG&E Storage
Core and Market Center
132127116
Wild Goose Storage437421346
Central Valley Storage000
Lodi Storage14918277
Gill Ranch Storage11719
Pipeline Balancing Withdrawal000
Balancing Gas
Imbalance Gas in Storage**307831803106
PG&E Total Gas in Storage886688883689019

*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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