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.

Thursday, October 22, 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.

Detailed maps where PSPS is being considered and/or implemented can be found here: https://pgealerts.alerts.pge.com/outages/map/
Summary: The PG&E Emergency Operations Center is currently activated and monitoring a Diablo Wind event underway across Northern California that is expected to last into tomorrow morning. PG&E Meteorology will continue to closely monitor the weather station observations today and latest forecast models to support weather all clear declarations and restoration of power in areas where it is safe to do so. The National Weather Service has multiple Red Flag Warnings in effect today through tomorrow due to a combination of gusty offshore winds and critically dry conditions. The Federal Northern Operations Predictive Services is forecasting high risk of significant fire potential for most of Northern CA today and tomorrow. The NOAA Storm Prediction Center (SPC) is showing critical fire weather in Northern CA today, and elevated fire weather showing tomorrow. Please note that PSPS is not executed across entire Zones and 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. The current forecast indicates Zones 1, 2, 4 and 5 are in a PSPS Warning through tomorrow morning. In addition, the latest weather models show potential for a strong and significantly dry Diablo wind event Sunday through Monday or Tuesday that will need to be monitored closely. The details regarding strength, timing and location of the weekend event are still uncertain. Future forecasts may show some Zones in Elevated PSPS potential Sunday into Monday or Tuesday once confidence in the forecast increases and details become clearer. Fuel moistures across the PG&E territory are critically dry. Fuels are expected to trend even drier with these additional Diablo wind events. 

Details: An offshore wind event unfolded last night across Northern California and breezy to gusty winds are expected to continue at times through tomorrow morning. Sustained winds of 15-30 mph gusting to 35-45 mph are expected this morning across the Sacramento Valley and Northern Sierra, with potential for gusts to exceed 50 mph over favored peaks and ridges. Winds will decrease somewhat this afternoon before a second but weaker peak in winds develops tonight into tomorrow morning. Offshore flow will gradually diminish throughout the day Friday and become onshore overnight into Saturday. This will result in cooler temperatures and increased humidity. However, a much stronger weather system is expected to move through the region Sunday into Monday which could result in another round of breezy to gusty offshore winds increasing through the day Sunday, peaking Sunday night into Monday, and possibly lingering in some regions through early Tuesday. 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 Sunday through Tuesday once forecast confidence increases. Fire danger remains seasonably high as live fuel moisture values are at critical levels and dead fuel moisture values are trending well below seasonal averages and are near historically low values 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 and November followed by normal large fire potential in 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.

View map as full screen

NOTE: Internet Explorer is not supported for this application.


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.


Update your contact information