Learn the role weather plays in a power shutoff


If weather forecasts indicate gusty winds and dry conditions, combined with a heightened fire risk, it may be necessary for us to turn off the electricity serving that area. This is called a Public Safety Power Shutoff (PSPS). Learn more about a PSPS.



  IMPORTANT: This map does not reflect the most detailed and up to date information about announced Public Safety Power Shutoff events. For the latest information visit pge.com/pspsupdates.

The information in this map is intended only to provide customers with a general estimate regarding potential locations that may be impacted by a PSPS event should one become necessary. Conditions affecting a possible PSPS event can change quickly and the actual impact of a future PSPS event is uncertain.

 

Find your PG&E Geographic Zone and 7-day key below.

Monday, January 18, 2021 

NOTE: This forecast is based on weather conditions and fuel moisture content only and does not include other criteria used to determine whether a PSPS may be necessary.

Summary: The PG&E Emergency Operations Center remains activated and is currently monitoring an offshore wind event that will continue to unfold across Northern and Central California this evening, spread into Southern California, and will diminish early Wednesday. The highest risk for critical fire weather (gusty winds, low relative humidity, and dry fuels) will reside along the Southern Coastal and Southern Sierra Ranges. Zone 8 is now in PSPS Warning for tomorrow, with Zones 6, 7, and 9 in PSPS Warning for tomorrow and Wednesday.


Details: PG&E Meteorology continues to monitor a strong offshore wind event. Winds will begin to increase over the next few hours and will peak overnight into tomorrow morning. A lull in the winds are then expected tomorrow afternoon, with breezy to locally gusty winds redevelop tomorrow night into Wednesday morning. However, the wind push tomorrow evening into Wednesday morning will not be as strong as tonight’s push. In a normal winter, PSPS would not be under consideration as soil moistures, dead fuel moistures and a significant green flush of winter grass would be widespread, but this winter has been very abnormal. The National Weather Service has High Wind Warnings and Fire Weather Watches active for this event. The CDEC is reporting that only 22% of the average rainfall this winter has fallen in the Southern Sierra, 29% in the Central Sierra, and 39% in the Northern Sierra. The last month has also been abnormally warm based on data from the Western Region Climate Center. Recent rain across Northern California has resulted in welcome increases in the larger dead fuel moisture classes and the winter grass crop is slowly emerging, which will likely mitigate fire risk across Northern CA and the Bay Area. However, some landscapes across the south are still dominated by last winter’s dead grass crop and moisture in the shrubs are still low, which was confirmed yesterday through visual inspections of fuels on the ground and aerial imagery taken via helicopter. PG&E Emergency Operations Center will remain activated to monitor the wind event and please stay tuned to future updates as this is an evolving and dynamic situation. 

Please note: This forecast is published daily by an operational meteorologist from PG&E’s Meteorology and Analytics team. This forecast has been customized for PG&E utility operations and should not be used for any other purpose or by any other entity. This forecast only provides a broad overview for a potential Public Safety Power Shutoff (PSPS) event in the next 7 days as determined from an analysis of forecasted weather, the potential for wind-related damage, and fuel moisture content in dead and live vegetation. It is not a fire danger forecast. The forecast is broken down by broad PG&E Geographic Zones numbered 1 - 9; however, PSPS decisions are made at more granular levels; thus, only a portion of a zone may experience a PSPS event. While a PSPS event may not be expected for an area, due to the interconnectivity of the grid any location within PG&E territory may be subject to PSPS event.

Explore PG&E's weather map



Whether it's a big winter storm on the horizon or an extended spell of hot and dry weather, PG&E continuously monitors the weather to make sure we're ready to respond to whatever hits our service area. A team of meteorologists analyzes information around the clock to make sure we have the right data to plan ahead and help our customers prepare.


This interactive weather map was created by collecting information from weather stations or cameras throughout PG&E's service territory. The weather stations can vary in the type of information collected (for example, one may report wind only, while another may report humidity, temperature, wind speed and more). Also, each weather station includes its own information timestamp.


We've made this map available to our customers so that you can have the latest information that may affect your plans to help you prepare. Learn how to use the interactive features to display the data you want to see by clicking on the information bar below the map.

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The information displayed on and available through this webpage is intended only to provide customers with a general estimate regarding potential locations that may be impacted by a PSPS event should one become necessary. Conditions affecting a possible PSPS event can change quickly and the actual impact of a future PSPS event is uncertain.

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