Operating Data | California Gas Transmission Pipeline Status

OFO/EFO Outlook

Last Updated Thursday, April 27, 2017 at 7:18 AM
Gas DayActivityToleranceStage/Noncompliance ChargeReason
4/25/2017No OFO in Effect
4/26/2017System Wide OFO in Effect5% Stage 1 at $ .25 /Dth High Inventory
4/27/2017System Wide OFO in Effect6% Stage 1 at $ .25 /Dth High Inventory
4/28/2017No 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 4, posted 10:28 PM PT

Last updated for the Gas Day of 04/27/2017
Next update expected by 8:00 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)

Ending Inventory HistoryEnding Inventory Forecasts
MMcf4/24/20174/25/20174/26/20174/27/20174/28/20174/29/20174/30/2017
4750
4700
4650
4600
4550
4500
4450
4400
4350
4300
4250 4276
4200
4150
41004111 4146 4105
4050 4074 4075
4000 4018
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
4/27/2017
Forecast
for
4/28/2017
Forecast
for
4/29/2017
Forecast
for
4/30/2017
Beginning Inventory4146407440184075
Ending Inventory4074401840754105
Inventory Change-72-565730
 
Upper Limit4350435043504350
Difference*
(Upper Limit - Ending Inventory)
276332275245
 
Lower Limit3900390039003900
Difference*
(Ending Inventory - Lower Limit)
174118175205

*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 10:28 PM PT

Last updated for the Gas Day of 04/27/2017
Next update expected by 8:00 AM PT
(The Gas Day runs from 7:00 AM to 7:00 AM)
Forecast
for
4/27/2017
Forecast
for
4/28/2017
Forecast
for
4/29/2017
Forecast
for
4/30/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 59.5
6162.264.967.1
Demand
On-System Demand1,5301,4401,2451,205
Off-System Deliveries
SoCal Gas (KRS)236146146146
Southwest Gas8888
Kern River GT - HDL0000
Transmission Shrinkage26262626
Injection
PG&E Storage Injection (395 Maximum)*
Core, Market Center, and Pipeline Balancing
178295295307
Wild Goose Storage170929292
Central Valley Storage1747474
Lodi Storage47134216216
Gill Ranch Storage86222278
TOTAL SYSTEM DEMAND2,2822,2362,1242,152
Supply
Interconnect Supply
Gas Transmission Northwest1,4451,4201,4201,420
Ruby408399399399
California Production31313131
SoCal Gas (KRS)0000
Kern River GT - HDL0000
Kern River GT - Daggett5242424
Southern Trails1303030
El Paso Natural Gas155132132132
Transwestern165145145145
Withdrawal
PG&E Storage Withdrawal (955 Maximum)*
Core, Market Center, and Pipeline Balancing
0000
Wild Goose Storage0000
Central Valley Storage0000
Lodi Storage0000
Gill Ranch Storage0000
TOTAL SYSTEM SUPPLY2,2092,1812,1812,181
INVENTORY CHANGE
(Supply - Demand)
-72-565730
TOTAL CUSTOMER IMBALANCE-48-603979

*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
4/27/2017
Forecast
for
4/28/2017
Forecast
for
4/29/2017
Forecast
for
4/30/2017
Injection
PG&E Storage
Core and Market Center
423497497497
Wild Goose Storage462387387387
Central Valley Storage58131131131
Lodi Storage75162216216
Gill Ranch Storage31222222
Pipeline Balancing Injection400068
Withdrawal
PG&E Storage
Core and Market Center
229201201201
Wild Goose Storage293296296296
Central Valley Storage57575757
Lodi Storage282800
Gill Ranch Storage1000
Pipeline Balancing Withdrawal0000

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

Actual
for
4/24/2017
Actual
for
4/25/2017
Actual
for
4/26/2017
COMPOSITE TEMPERATURE
Historical Average for current day: 59.5
57.560.759.8
Demand
On-System Demand1,6201,4451,510
Off-System Deliveries
SoCal Gas (KRS)163192201
Southwest Gas666
Kern River GT - HDL000
Transmission Shrinkage272826
Injection
PG&E Storage
Core, Market Center, and Pipeline Balancing
285236236
Wild Goose Storage152185150
Central Valley Storage4900
Lodi Storage978139
Gill Ranch Storage1027731
TOTAL SYSTEM DEMAND2,5022,1772,299
Supply
Interconnect Supply
Gas Transmission Northwest1,4111,4731,414
Ruby482487412
California Production272625
SoCal Gas (KRS)000
Kern River GT - HDL000
Kern River GT - Daggett413428
Southern Trails000
El Paso Natural Gas174201187
Transwestern140122104
Withdrawal
PG&E Storage
Core, Market Center, and Pipeline Balancing
000
Wild Goose Storage000
Central Valley Storage000
Lodi Storage000
Gill Ranch Storage000
TOTAL SYSTEM SUPPLY2,2762,3422,169
INVENTORY CHANGE
(Supply - Demand)
-226165-130
TOTAL CUSTOMER IMBALANCE-164270-120

*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
4/24/2017
Actual
for
4/25/2017
Actual
for
4/26/2017
Injection
PG&E Storage
Core and Market Center
428405491
Wild Goose Storage594527453
Central Valley Storage1065858
Lodi Storage12336171
Gill Ranch Storage403431
Pipeline Balancing Injection66760
Withdrawal
PG&E Storage
Core and Market Center
153209234
Wild Goose Storage461335292
Central Valley Storage575757
Lodi Storage282828
Gill Ranch Storage000
Pipeline Balancing Withdrawal0021
Balancing Gas
Imbalance Gas in Storage**3,3073,5553,445
PG&E Total Gas in Storage73,96974,31074,583

*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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