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.

Tuesday, October 20, 2020 

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 has been activated to prepare for a potential Diablo Wind event across Northern California Wednesday night through Friday morning. There is a PSPS Watch for Geographic Zones 1, 2, 3, 4, and 5. Please note that PSPS is not executed across entire Zones and much more detailed maps where PSPS is being considered can be found here: https://pgealerts.alerts.pge.com/outages/map/. This is only intended to provide a high level overview.  PSPS decisions are made at more granular levels based on high resolution data; thus, only a portion of a zone may experience a PSPS event. At this time, the highest probability areas for observing a PSPS are in the Northern Sacramento Valley and adjacent elevated terrain, the Northern Sierra Nevada generally north of I-80, the North Bay mountains and near Mt. Diablo in the East Bay Area.  At this time, the weather event is expected to begin Wednesday night across the far North and spread southward into the Bay Area Thursday through Friday morning. The start of the event is more than a day away so event details may change as forecast models evolve. Please stay tuned to future updates.   


Details: Dry weather and above normal temperatures will continue across the territory through the middle of the week, with temperatures reaching 15-20 above normal across parts of the Delta and Interior. Light offshore flow is also expected today into tomorrow, and wind gusts will remain under 30 mph and will be primarily focused across the western Sacramento Valley and Northern Sierra in addition to elevated North Bay terrain. Wednesday night through Friday morning, a stronger offshore wind event is anticipated to develop, as a weather system shifts into the Pacific Northwest. This will result in two periods of breezy to gusty north-northeast winds, with the first expected to produce sustained winds of 15-35 mph gusting up to 40-50 mph, across the Sacramento Valley, Northern Sierra, and elevated terrain of the North and East Bay with potential for gusts to exceed 60 mph over favored peaks and ridges. With a second weaker peak expected Thursday evening into Friday morning, with winds expected to be around 5-10 mph less than the first push. Offshore flow will gradually diminish throughout the day Friday and calmer winds and seasonable temperatures are expected. An additional weather system is then expected to move through the region Saturday into Sunday, resulting in increasing humidity and a slight chance for light showers across the North and along the Sierra. High pressure will then rebuild behind this departing system, which may result in another round of breezy to gusty offshore flow starting as early as Saturday night and continuing through Monday; however, details are still limited at this time and forecast models are not in alignment on strength and timing. PG&E meteorology will continue to monitor the situation closely for any weather model forecast changes and the forecast may be updated to elevated Saturday through Monday across Northern CA once forecast confidence increases. Fire danger remains seasonably high as live fuel moisture values are at critical levels in the lower and middle elevations and dead fuel moisture values are at critical levels and historically low in some areas. The US Drought Monitor indicates that most of Northern CA is in severe to extreme drought at this time, and the last 6 months have been the hottest on record for CA (hottest in 126 years on record) according to the NCDC. The latest National Interagency Fire Center wildland fire potential outlook continues to favor above normal large wildland fire potential for most of Northern CA for October followed by normal large fire potential for November and December.

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.

SAFETY TIP: Help us reach you when it’s important. Make sure we have your correct email address and phone number so we can reach out to you in advance of a public safety power outage, when and where possible.


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