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

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, November 18, 2019 

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.

A strong north or northeast wind event is expected to develop late Tuesday into Thursday this week, generally affecting the northern half of the PG&E territory.  There is still considerable uncertainty regarding the strength, timing and humidity levels with this system and some changes in the forecast are possible moving forward.  Nonetheless, there is an increasing possibility that gusty winds will result in critical fire weather conditions. The National Weather Service (NWS) has issued Fire Weather Watches that will likely be upgraded soon to Red Flag Warnings for many areas across central and northern California due to the potential critical fire conditions. Northern Operations Predictive Services is forecasting a high risk event and increased potential for significant fires due to these dry and gusty winds.  Please refer to weather.gov, https://gacc.nifc.gov/oncc/, or https://gacc.nifc.gov/oscc/ for the latest updates from federal forecast agencies. As a result of the potential critical fire weather conditions, Geographic Zones 2, 3, 4 and 5 are now under a PSPS Watch for Wednesday and Thursday. The PG&E Emergency Operations Center remains activated to monitor and prepare for the event.
Details:  High pressure will hold over the PG&E territory today for continued dry weather and warmer than normal temperatures.  Expect maximum temperatures away from the immediate coast to rise into the 70s to low 80s and that is 10 – 20 degrees above normal for mid-November.  A low pressure system is then forecast to move southward through the territory tomorrow for cooler weather and a chance for showers along the North Coast and Sierra before moving into southern California mid-week.  The storm is forecast to produce shower activity both days across the southern part of the state including possibly the southern areas of the territory, primarily Kern county.  High pressure will build into Oregon over that time frame and gusty north or northeast winds are favored to develop across the northern half of the state on Tuesday evening and into Thursday.  Strong wind gusts in excess of 50 mph are possible across the elevated terrain in the SF North Bay in addition to the northern Sierra foothills.  Winds will not be as strong across the low elevation areas outside of the Sacramento and northern San Joaquin Valleys where gusts up to 40- 45 mph are possible during the day Wednesday.  Winds are forecast to decrease by Thursday night with light winds expected for the rest of next week and next weekend.  Most of northern and central California has not received any significant precipitation this fall and fire potential is well above normal as live fuel moisture remains below critical values for mid-November and dead fuel moisture is at historically low levels in many areas.  The CDEC Northern Sierra 8 station index has only observed 0.3 inches of rain in Oct and Nov to start the water year.  This a paltry 4% of normal.  If no rain occurs in the northern Sierra for the remainder of November, it would be the driest start to the water year in 60 years and tied for 2nd driest in the past 100 years.      
   

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.

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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PG&E weather map


Information is provided by weather stations or cameras throughout PG&E’s service territory. Note that weather stations vary in the type of information collected (i.e., one may report wind only, while another may report humidity, temperature, wind speed and more). Also, each weather station includes its own information timestamp.

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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.