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.

Saturday, September 26, 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.

For more detailed geographic information about the upcoming PSPS event please visit https://pgealerts.alerts.pge.com/outages/map/?type=forecasted A dry offshore (Diablo) wind event will begin across Northern CA overnight, will peak and spread south along the High Sierra tomorrow, eventually reaching Southern CA zones tomorrow night into Monday as Santa Ana winds develop across the south. Winds will then decrease across the North during the first half of Monday, while decreasing across the South Monday afternoon/evening. Peak sustained winds of 20 – 30 mph with gusts 40 – 55 mph are anticipated, with the highest gusts through the favored gaps. These winds will also coincide with hot temperatures and low relative humidity and the National Weather Service has issued Red Flag Warnings for most of Northern CA from tonight through midday Monday. The Northern Operations Predictive Services has also forecast ”High Risk” for strong and dry offshore winds combined with dry surface fuels. Please refer to weather.gov, https://gacc.nifc.gov/oncc/, or https://gacc.nifc.gov/oscc/ for the latest updates from federal forecast agencies. PG&E Geographic Zones 2 and 5 are now showing PSPS Warning for Sunday and Monday due to the first rounds of Diablo winds expected overnight tonight. The PSPS Warning for Zone 5 is valid for the north part of that zone, generally north of a Lake Oroville to Quincy line.  Zones 3, 4, 8, and 9 remain in a PSPS Watch.
Details: A strong ridge of high pressure will build over California this weekend and will result in a pronounced warming trend that will continue into the beginning of next week. Widespread triple digit heat is expected tomorrow into Tuesday, including near the coast and in coastal valleys. Breezy offshore winds will develop across the Northern Interior tonight and will peak tomorrow into early Monday across the northern Sierra foothills. Strong easterly to southeast winds will then spread south along the Sierra into Southern Divisions tomorrow night into Monday, with all winds expected to decrease through the day Monday. Peak gusts are expected to range between 40 – 55 mph tomorrow into Monday, with the highest gusts expected to occur through favored gaps across the North. Slightly cooler conditions are then possible near the coast during the middle of next week, although above normal temperatures look to continue through all of next week. 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 seasonal minimums. The latest National Interagency Fire Center wildland fire potential outlook favors above normal large wildland fire potential for most of Northern CA for September and 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.

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