Power Outage in Groveland, CA

Thunderstorm Wind. Tuolumne County Emergency Manager reported several trees and power poles down near the intersection of Martin Lane and Campo Seco Road. The Mount Elizabeth RAWS reported a maximum wind gusts of 61 mph.

March 11, 2023

Tornado. Numerous hardwood trees snapped or uprooted. A wooden power pole snapped in half. NWS Storm Survey determined it to be rated EF-1 with 90 mph winds.

March 11, 2023

Flash Flood. A period of heavy rain upstream from Moccasin Dam, in which about three inches fell during four hours led to significant erosion and at least one landslide. It caused a massive amount of water and debris to run downhill into the Moccasin Reservoir. The water level rose to 3 times the normal reservoir capacity and the emergency spillway was utilized. There was severe erosion of the emergency spillway and potential for the dam to fail. The Power house and staff at the Moccasin Fish Hatchery were evacuated due to potential failure. All the fish in the Moccasin Creek Hatchery were killed when it flooded from the water coming over the emergency spillway. The National Weather Service issued a flash flood warning associated with the probable dam failure, and the sheriff advised residents to avoid the area as a matter of public safety. The warning was reduced to a watch until the reservoir was drained and then the watch was canceled once the reservoir was drained.||Cleanup and repair efforts associated with a major storm that damaged Tuolumne County's Moccasin Creek Dam in March is expected to cost roughly $43 million, according to an estimate by the San Francisco Public Utilities Commission, which owns and operates the dam. That total includes $3.2 million in damage to the state fish hatchery at Moccasin Creek, which lies downstream.

March 22, 2018

Thunderstorm Wind. An NWS storm survey team determined straight line winds from a micro-burst associated with a severe thunderstorm caused damage in Twain Harte, CA Numerous trees were brought down, and a home was damaged. Winds gusted to an estimated 105 mpg. Significant wind damage was done along Twain Harte Rd. with many trees and power lines knocked down as a severe thunderstorm passed through. A woman was briefly trapped in a damaged vehicle by a falling tree, and was rescued by the fire department. The woman was not injured.

March 21, 2017

Groveland, CA (3:09 PM) Grid Power Outage Event >> The Ting Network detected an Electric Utility Grid Power Outage… https://t.co/lhGHHllZtd

@grid_events - January 09, 2023 23:30

Groveland, CA (12:08 AM) Grid Power Outage Event >> The Ting Network detected an Electric Utility Grid Power Outage… https://t.co/1DO7ikJOeu

@grid_events - August 01, 2021 07:30

anthony really thinks it’s okay to work nights during the power outage ??

@caitlindowlingg - September 09, 2020 03:47