UPDATE: PG&E says number of customers impacted by shut-off decreased
From PG&E’S weather awareness page
UPDATE SUNDAY 2:41 P.M.:
A PG&E Public Safety Power Shutoff (PSPS), expected to impact customers in 16 counties primarily in the Northern and Central Sierra region, is underway. Due to favorable changes in forecast weather conditions, the number of customers expected to be impacted in this event has decreased by 27%.
A first wave of customers lost power around 4 a.m. today, and the second wave of de-energization is expected to occur around 4 p.m. today.
As of Sunday afternoon, the shutoff is expected to impact 2,887 Nevada County customers. To find out if their location is being monitored for a potential shutoff, PG&E customers can use the address lookup tool athttp://www.pge.com/pspsupdates.
Power is expected to be out overnight and into Monday morning for impacted customers; de-energized line inspection is planned for Monday morning as high winds are forecast to have subsided, and power will be restored in stages at that point, according to PG&E.
Temporary Community Resource Centers have opened in affected counties to provide ADA-accessible restrooms, hand-washing stations, medical equipment charging, Wi-Fi, bottled water, grab-and-go bags, and non-perishable snacks during the shutoff event.
Nevada County’s Community Resource Centers are located at Foothills Event Center — 400 Idaho Maryland Road in Grass Valley — and the parking lot of the Nevada City Elks Lodge at 518 State Highway 49 in Nevada City. They will be open from 8 a.m. to 10 p.m.
UPDATE SUNDAY 8:39 A.M.:
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 Sunday 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.
UPDATE Friday, Sept. 25, 3:48 p.m.:
PG&E Meteorology continues to closely monitor a dry offshore wind event that will begin to develop across Northern CA Saturday, will peak and spread south along the high Sierra Sunday evening, eventually reaching Southern CA divisions Sunday night into Monday. Winds will then decrease across the North Monday morning, while decreasing across the south Monday afternoon/evening.
Some details may still evolve as the event draws closer, but currently sustained winds of 20 – 30 mph with gusts 45 – 55 mph are anticipated, with the highest gusts through the favored gaps. These northerly winds will also coincide with very hot temperatures and the National Weather Service has issued a Red Flag Warnings and Fire Weather Watches for portions of Northern CA valid from Saturday evening through 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.
At this time PG&E Geographic Zones 2, 3, 4, 5, 8, and 9 are in PSPS Watch Sunday through Monday.
Nevada County is in zone 5.
UPDATE Friday, Sept. 25, 2020:
Nevada County is still in a PSPS Watch as of 10 a.m. Friday.
Thursday, Sept. 24, 2020
PG&E Meteorology is closely tracking the potential for dry northerly winds to develop Saturday evening and continue into Monday morning across Northern CA. The event start is still about 60 hours away from this time (Sept. 24, 8 am) and as we get closer, some details regarding strength, timing and location of the event may change if models evolve. The northerly winds will coincide with very hot temperatures and the National Weather Service has issued a Fire Weather Watch for portions of Northern CA valid from Saturday through 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. At this time PG&E Geographic Zones 2 and 5 are in PSPS Watch Saturday night through Monday morning.
Details: A passing cold front brought rain to northern Humboldt last night, but precipitation has tapered off and fair and dry weather is expected for all locations today. Temperatures will remain close to or slightly above normal today and tomorrow before a strong ridge of high pressure builds over California and results in a pronounced warming trend this weekend. Widespread triple digit heat is possible Sunday and Monday, including near the coast and in coastal valleys. Breezy north or northeast winds are also expected at times across the northern interior starting Saturday afternoon/evening and continuing at times through Monday morning. Strongest winds are expected during the overnight and morning hours Saturday and Sunday in the northern Sierra foothills where gusts in excess of 45 mph are possible. Slightly cooler conditions are possible near the coast early next week, but very hot and dry conditions will continue through at least the first half 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.
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The three biggest fires to impact Nevada County residents this fire season, so far, were caused by humans, according to Cal Fire officials.