N-1Report
49 passages
JANUARY 18-19, 2026 WINTER STORM STORM REPORT 0 METHODOLOGY • The report assigns the temperature and wind data based on the highest observed speeds that occurred during the event. • Full accounting of hourly weather data is provided as an...
AI summary The storm report outlines a methodology for analyzing the January 2026 winter storm's impact, including temperature/wind data analysis, outage metrics (unique vs. total customer impacts), and the use of eight representative weather stations to assess event magnitude and timing. It emphasizes NS Power's operational boundaries and restoration processes.
ific sites. Wind speeds and gusts vary significantly due to local effects and conditions such as, but not limited to, shelter from trees, exposed hilltop, sheltered valleys, or coastal wind effects (i.e. stations located on coastline obser...
AI summary A nor'easter in January 2026 caused heavy wet snowfall across Nova Scotia, leading to tree and equipment loading, widespread power outages, and complicated restoration efforts due to road conditions and reduced mobility.
es, leaving to widespread outages. • Snowfall warnings were in effect for much of the province, while road conditions and reduced mobility further complicated restoration efforts. 2 SECTION 2: WIND OBSERVATIONS Forecast (24Hr Prior) Actual...
AI summary Severe winter weather, including heavy snowfall and high winds, caused widespread outages across Nova Scotia. Wind observations from multiple regions (Annapolis Valley, South Shore, Northern Nova Scotia, etc.) show sustained wind speeds up to 55 km/h and gusts exceeding 56 km/h, with temperatures as low as -10°C. These conditions complicated infrastructure restoration efforts.
toration principles, these smaller outages are addressed following restoration of larger outages and are often complicated by off-road or remote locations of damage or tree contacts or flooded areas.
AI summary Smaller outages are addressed after larger ones, with challenges arising from remote locations, tree contacts, and flooded areas complicating restoration efforts.
Event End Time is noted as the beginning time of the final outage attributable to the storm event. Combined with the start time, these two times provide the bounds of the outage events included in storm analysis. As shown in the graph abov...
AI summary A wind, snow, and rain event on January 18-19, 2026, caused widespread power outages in Nova Scotia. The map illustrates provincial impact by customer hours of interruption (CHI), with over 300 field resources deployed for restoration. Outages continued beyond the storm event's end time, highlighting prolonged service disruption.
Northeast Orange >25,000 Yellow >10,000 Zone Customers Unique Customer Hours of Green <10,000 Impacted Customers Interruptions (CHI) Valley Eastern Shore (CI) Impacted Halifax Valley 27,882 22,880 182,756 Customers Restored within x South...
AI summary The text presents a table analyzing power outage restoration performance during a storm, showing customer impact by zone, restoration rates within 6-48 hours, and customer hours of interruption (CHI). Metrics highlight regional disparities, with the South Shore having the highest CHI and the Northeast having the lowest customer impact.
urs of the start of the storm, rather than the start of their individual CB East 2,248 2,243 15,729 outage. Province 168,514 139,328 1,803,004 81.91% of customers were restored prior to the stormy weather ceasing. Average restoration time...
AI summary The text reports that 81.91% of customers were restored before stormy weather ceased, with an average restoration time of 15.8 hours. It notes that customer impact (CI) figures represent total, not unique, impacted customers. Wind gusts preceding the event are mentioned, but no specific entities or regulatory matters are cited.
SECTION 4: PROVINCIAL HIGHLIGHTS Max Wind Weather Direction Wind Temp Customers Duration Zone Date/ Time Gusts Cause Sub-Cause Description Station (Degrees) (km/h) (°C) Impacted (Hours) (km/h) Heavy, wet snow accumulation 1/19/2026 Tree on...
AI summary Section 4 details provincial weather-related power outages on January 19, 2026, caused by heavy snow and falling trees at Greenwood and Yarmouth. Each event disrupted 1,118 and 1,010 customers respectively, with durations of 13.13 and 34.79 hours, attributed to tree contact with power lines.
mary lines, opening the recloser. Heavy, wet snow likely caused 1/19/2026 Adverse Northern Nappan 230 13 33 -6 Wet Snow the customers service line to 1 7.39 8:39 Weather fail. Heavy, wet snow accumulation 1/19/2026 Adverse on primary line...
AI summary The text details power outages caused by heavy, wet snow on January 19, 2026, affecting locations in Northern Nappan, Northeast Caribou Pt., and Metro Halifax Airport. Incidents involved conductor failures and recloser openings due to snow accumulation on primary lines, impacting service lines and customers.
irport Weather conductor to fall, opening the recloser. Heavy, wet snow accumulation Eastern 1/19/2026 Beaver Adverse 40 35 37 0 Wet Snow resulted in transformer arcing, 303 5.25 Shore 4:17 Island Weather opening the recloser. Heavy, wet s...
AI summary The text details weather-related power outages in Nova Scotia from January 19, 2026, caused by heavy snow and falling trees. Events include transformer arcing and recloser openings at locations like Beaver Island, Grand Étang, and Sydney, impacting grid reliability and customer service.
Weather caused the recloser to operate. 6 SECTION 4: PROVINCIAL HIGHLIGHTS – TOP 5 EVENTS BY CUSTOMERS IMPACTED Max Wind Weather Direction Wind Temp Customers Duration Zone Date/ Time Gusts Cause Sub-Cause Description Station (Degrees) (km...
AI summary Two weather-related power outages occurred at Halifax Airport on January 19, 2026, caused by heavy wet snow leading to tree contact and falling trees. The first event at 5:19 AM affected 5,009 customers for 7.79 hours, while the second at 6:21 AM impacted 3,991 customers for 6.15 hours, both triggering recloser operations.
Heavy, wet snow accumulation on primary 1/19/2026 Halifax Adverse Halifax 45 20 30 0 Wet Snow line caused the conductor 3916 6.74 3:31 Airport Weather to fall, opening the recloser. Heavy, wet snow accumulation on trees 1/19/2026 Halifax H...
AI summary The text documents two incidents on January 19, 2026, in Halifax caused by heavy, wet snow leading to conductor falls and tree contacts, resulting in recloser openings and power outages. The entries include dates, locations, weather conditions, and technical details of the failures.
45 20 30 0 Wet Snow line caused the conductor 3429 12.44 4:20 Airport Weather 7 to fall, opening the recloser. SECTION 4: PROVINCIAL HIGHLIGHTS – TOP 5 EVENTS BY DURATION Max Wind Weather Direction Wind Temp Sub- Customers Duration Zone Da...
AI summary The text details a weather event involving wet snow causing a conductor to fall and a recloser to open, leading to customer outages. It includes a table listing top provincial events by duration, highlighting weather-related disruptions, wind gusts, temperatures, and impacted customers.
Heavy, wet snow accumulation South 1/19/2026 Tree Falling Yarmouth 40 17 17 0 caused a tree to contact the primary 1 64.48 Shore 2:20 Contacts Trees line servicing the customer. Heavy, wet snow accumulation 1/19/2026 Tree Untrimm Valley Gr...
AI summary The text details three incidents in Nova Scotia on January 19, 2026, where heavy, wet snow caused trees to fall onto primary power lines in Yarmouth and Greenwood, leading to service disruptions. Each event resulted in one customer outage, with associated costs ranging from $63.25 to $64.48. The incidents highlight infrastructure vulnerabilities to weather-related tree damage.
Heavy, wet snow accumulation South 1/19/2026 Tree Falling Yarmouth 20 17 17 0 caused a tree to contact the primary 63 62.35 Shore 3:09 Contacts Trees line, opening the fuse. Heavy, wet snow accumulation on South 1/19/2026 Adverse Wet Yarmo...
AI summary Heavy, wet snow accumulation in Yarmouth on January 19, 2026, caused trees to fall onto primary power lines, leading to conductor failure and fuse openings. Two incidents are documented with specific timestamps and outage impacts.
Weather Snow fall, opening the fuse. NOTE: NS Power’s Emergency Services Restoration Plan details the restoration priorities which focus on restoring power to critical infrastructure and the largest number of customers first. Following thi...
AI summary Heavy, wet snow caused power outages in Valley region, primarily due to tree contacts with power lines. NS Power's restoration plan prioritized critical infrastructure and large customer groups, impacting 27,882 customers with 182,756 customer hours of interruption, fully restored after 69.70 hours.
mer hours of interruption: 182,756 57% Full Restoration : 69.70 Hours elapsed time from first outage event to restoration of last event Customers Restored within X hours of Storm Onset Adverse Weather Cause of Outage (CHI) Valley % This ta...
AI summary The text presents outage statistics, including 182,756 hours of interruption (57% of total), with 69.70 hours for full restoration. It details customer restoration rates within 6, 12, 24, and 48 hours post-storm onset, noting 49.44% restored within 6 hours and 99.996% within 48 hours. Adverse weather (wind, wet snow) is cited as the cause, with an average restoration time of 9.99 hours for the region.
9 96% SECTION 4: ZONE IMPACT SUMMARY – VALLEY TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Max Customer Weather Direction Wind Wind Duration Zone Date/ Time Temp (°C) Cause Sub-Cause Description s Station (Degrees) (km/h) Gusts (H...
AI summary A weather event on 1/19/2026 at 7:05 in the Valley zone caused heavy, wet snow accumulation from an untrimmed tree at Greenwood, leading to a 1-hour power outage affecting 63.75 customers due to a tree contacting the primary line.
Contacts Tree line servicing the customer. Heavy, wet snow accumulation 1/19/2026 Tree Valley Greenwood 30 17 28 0 Falling Trees caused a tree to contact the line 2 38.63 4:26 Contacts servicing the customer. Customer Impact Max Wind Weath...
AI summary A tree contact caused by heavy, wet snow accumulation on January 19, 2026, led to a power outage in the Valley and Greenwood areas. The incident resulted in 1,799 customers being impacted for 2.5 hours due to a substation breaker operating under adverse weather conditions.
Weather breaker at the substation to operate. Heavy, wet snow 1/19/2026 Adverse Valley Greenwood 40 13 13 0 Wet Snow accumulation caused the 1622 4.41 3:55 Weather recloser to operate. 10 SECTION 4: ZONE SUMMARY IMPACT SUMMARY – SOUTH SHOR...
AI summary A heavy wet snow event on 1/19/2026 caused power outages in the South Shore region, with 39,609 customers impacted and 914,299 customer-hours of interruption. Tree contact with power lines accounted for 47% of outages, and full restoration took 67.01 hours.
Adverse Weather Customer hours of interruption: 914,299 Full Restoration : 67.01 Hours elapsed time from first outage event to restoration of last event Customers Restored within X hours of Storm Onset Adverse Weather Cause of Outage (CHI)...
AI summary Adverse weather caused significant power outages, with 914,299 customer hours of interruption. Restoration took up to 67.01 hours, and only 20.26% of customers were restored within 6 hours of the storm. Average restoration time was 29 hours, with wind and wet snow identified as primary outage causes.
Wind Wet Snow 64% 11 SECTION 4: ZONE IMPACT SUMMARY – SOUTH SHORE TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Max Weather Direction Wind Wind Temp Customers Duration Zone Date/ Time Cause Sub-Cause Description Station (Degrees) (...
AI summary A heavy wet snow event on January 19, 2026, caused a tree to fall and contact a power line in the South Shore zone, impacting 1 customer for 64.48 hours. Wind speeds reached 17 km/h with gusts up to 17 km/h at Yarmouth station, leading to a power interruption.
1 64.48 Shore 2:20 Contacts customer. Heavy, wet snow accumulation on South 1/19/2026 Adverse Yarmouth 40 17 17 0 Wet Snow primary line caused the conductor to 10 63.25 Shore 2:17 Weather fall, opening the fuse. Customer Impact Max Weather...
AI summary A weather event on January 19, 2026, in Yarmouth caused heavy wet snow accumulation, leading to conductor failure and power outages. The incident impacted 1,704 customers for 2.18 hours, with primary causes attributed to falling trees and line contact.
Adverse Weather Customer hours of interruption: 19 Full Restoration : 10.22 Hours elapsed time from first outage event to restoration of last event 74% Adverse Weather Cause of Outage (CHI) Customers Restored within X hours of Storm Onset...
AI summary The document details an adverse weather event causing power outages, reporting 19 customer hours of interruption (CHI) and full restoration after 10.22 hours. 74% of customers were restored, with 100% restored within 12 hours of the storm. The primary cause was wet snow, and the Northern Zone's impact is highlighted with average restoration at 4.81 hours.
Station (Degrees) (km/h) Gusts Impacted (Hours) (km/h) 1/19/2026 Adverse Heavy, wet snow likely caused Northern Nappan 230 13 33 -6 Wet Snow 1 7.39 8:39 Weather the customers service line to fail. Heavy, wet snow accumulation 1/19/2026 Tre...
AI summary The Northeast region experienced significant outages due to adverse weather, primarily caused by heavy, wet snow leading to tree-line contacts. Two incidents on 1/19/2026 at Nappan resulted in 7.39 and 4.99 customer hours of interruption (CHI), attributed to wet snow damaging service lines and trees contacting power lines.
Cause of Outages (CHI) The Northeast region was significantly impacted by 16% adverse weather, with outages driven primarily by wet snow causing tree contacts. Tree Contacts Outage Summary: Adverse Weather Customers Impacted: 7,226 Custome...
AI summary The Northeast region experienced significant outages due to adverse weather, primarily wet snow causing tree contacts. 7,226 customers were impacted, totaling 30,947 customer hours of interruption. 99.99% of customers were restored within 24 hours, with an average restoration time of 5.48 hours.
Wet Snow 15 95% SECTION 4: ZONE IMPACT SUMMARY – NORTH-EASTERN TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Direction Max Wind Weather Wind Customers Duration Zone Date/ Time (Degrees Gusts Temp (°C) Cause Sub-Cause Description St...
AI summary A wet snow event on January 19, 2026, caused a customer service line failure in the North-Eastern zone, impacting 1 customer for 23.28 hours. The incident was recorded at Caribou station with wind conditions of 310 degrees at 30 km/h gusts and temperatures at -1°C.
8 Eastern 12:08 Pt. Weather fail. Heavy, wet snow accumulation North 1/19/2026 Caribou Tree Untrimmed 40 28 28 -1 caused a tree to contact the 1 20.44 Eastern 5:49 Pt. Contacts Tree customer’s service line.
AI summary A report of heavy, wet snow accumulation causing a tree to contact a customer’s service line in the Eastern region, with untrimmed trees contributing to the incident. Weather conditions and temperature data are noted, along with a date (1/19/2026) and location (Caribou).
Customer Impact Max Wind Weather Direction Wind Customers Duration Zone Date/ Time Gusts Temp (°C) Cause Sub-Cause Description Station (Degrees) (km/h) Impacted (Hours) (km/h) Heavy, wet snow accumulation on trees North 1/19/2026 Caribou A...
AI summary A power outage in the North Eastern Zone on January 19, 2026, caused by heavy wet snow accumulation on power lines, impacted 1,779 customers for 3.13 hours and 1,497 customers for 2.44 hours. The event was attributed to adverse weather conditions leading to line contact and conductor failure.
2.44 Eastern 10:48 Pt. Weather caused the conductor to fall, opening the recloser. 16 SECTION 4: ZONE SUMMARY IMPACT SUMMARY – METRO This region was significantly impacted by adverse Cause of Outages (CHI) weather, with outages driven prim...
AI summary Adverse weather, specifically wet snow causing tree contacts, led to significant outages in the Metro region, impacting 88,760 customers with 653,757 customer hours of interruption. Full restoration took 38.52 hours, highlighting challenges in system reliability during extreme weather events.
Adverse Weather Full Restoration : 38.52 Hours 62% elapsed time from first outage event to restoration of last event Customers Restored within X hours of Storm Onset Adverse Weather Cause of Outage (CHI) Metro % This table represents the W...
AI summary The document details a power outage event caused by adverse weather (wind and wet snow), reporting 38.52 hours for full restoration and 62% of outages attributed to this cause. It includes metrics on customer restoration rates within 6, 12, 24, and 48 hours of storm onset, with an average restoration time of 10.01 hours for the Metro region.
Station (Degrees) (km/h) Gusts Impacted (Hours) (km/h) Heavy, wet snow accumulation 1/19/2026 Halifax Tree Halifax 45 20 30 0 Falling Trees caused a tree to contact the 7 34.74 4:08 Airport Contacts primary line, opening the fuse. Heavy, w...
AI summary Two incidents in Halifax on January 19, 2026, caused by heavy snow and falling trees, resulted in power outages. The first incident caused a tree to contact the primary line, opening a fuse and impacting 7 customers for 34.74 CHI. The second incident involved a tree contacting a customer’s service line, impacting 1 customer for 34.54 CHI.
Contacts primary lines, opening the recloser. 1/19/2026 Halifax Adverse Heavy, wet snow accumulation Halifax 360 25 40 1 Wet Snow 3991 6.15 6:21 Airport Weather caused the recloser to open. 18 SECTION 4: ZONE SUMMARY IMPACT SUMMARY – EASTE...
AI summary A severe weather event on January 19, 2026, in Halifax caused power outages due to heavy wet snow and tree contacts, impacting 1,747 customers with 4,323 customer hours of interruption (CHI). Full restoration took 33.48 hours, with 98% of customers restored within X hours of the storm onset.
rom first outage event to restoration of last event Customers Restored within X hours of Storm Onset 98% Eastern Shore % This table represents the Adverse Weather Cause of Outage (CHI) percentage of customers restored Within 6 Hrs 47.97% w...
AI summary The text presents outage restoration statistics for the Eastern Shore region, showing 98% of customers restored within 6 hours, 99.43% within 12 hours, 99.77% within 24 hours, and 100% within 48 hours of storm onset. The average restoration time was 4.50 hours, with wet snow identified as the cause of outages (CHI).
100% 19 SECTION 4: ZONE IMPACT SUMMARY –EASTERN SHORE TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Weather Direction Wind Max Wind Temp Customers Duration Zone Date/ Time Cause Sub-Cause Description Station (Degrees) (km/h) Gusts...
AI summary Two power outages on Nova Scotia's Eastern Shore on January 19, 2026, caused by heavy wet snow and falling trees, impacted 5 customers over 27.08 total hours. The first event involved conductor failure from snow accumulation, while the second resulted from tree contact with primary lines.
Customer Impact Max Wind Weather Direction Wind Temp Customers Duration Zone Date/ Time Gusts Cause Sub-Cause Description Station (Degrees) (km/h) (°C) Impacted (Hours) (km/h) Heavy, wet snow accumulation on trees Eastern 1/19/2026 Beaver...
AI summary Two power outages occurred in Eastern Shore on January 19, 2026, caused by heavy wet snow leading to fallen power lines, impacting 329 and 322 customers for durations of 0.02 and 3.3 hours, respectively.
Weather caused the conductor to fall, opening the recloser. 20 SECTION 4: ZONE IMPACT SUMMARY – CAPE BRETON WEST This region experienced heavy, wet snow during the Cause of Outages (CHI) weather event, with most outages caused by trees whi...
AI summary A weather event caused power outages in Cape Breton West, with most outages due to tree contacts and equipment failure. 1,038 customers were impacted, totaling 1,174 customer hours of interruption. Restoration averaged 7.44 hours, with 99.81% of customers restored within 24 hours.
ration time for this region was 7.44 hours. Wet Snow 21 100% SECTION 4: ZONE IMPACT SUMMARY – CAPE BRETON WEST TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Max Wind Customer Weather Direction Wind Duration Zone Date/ Time Gusts Te...
AI summary A weather event on January 19, 2026, in Cape Breton West caused heavy wet snow accumulation, leading to a tree falling and contacting a customer's service line. This resulted in a power interruption lasting 7.44 hours, with 17.92 customer hours of interruption (CHI) recorded. The event was attributed to wind gusts of 19 km/h from a 280-degree direction.
00 Étang Contacts West customer’s service line. Cape Heavy, wet snow accumulation 1/19/2026 Grand Adverse Breton 360 31 41 0 Wet Snow caused the transformer fuse to 1 12.2 10:33 Étang Weather West open.
AI summary A transformer fuse at Étang opened on 1/19/2026 due to heavy, wet snow accumulation, causing a customer service line interruption. The incident involved 1 affected customer and 12.2 CHI (Customer Hours of Interruption), with weather conditions cited as the root cause.
Contacts with primary lines, opening the West recloser. Cape Failed/Dam Heavy, wet snow accumulation 1/19/2026 Grand Electrical Breton 0 0 30 0 aged caused an insulator to break, 19 5.4 9:01 Étang Failure West Equipment opening the fuse.
AI summary The text references power interruption events on January 19, 2026, at Cape Breton and Étang, attributing failures to heavy snow accumulation causing equipment damage (insulator breakage) and recloser/fuse operations. Dates and locations are noted, with technical terms like 'recloser' and 'insulator' indicating infrastructure issues.
22 SECTION 4: ZONE IMPACT SUMMARY – CAPE BRETON EAST Cause of Outages (CHI) This region was impacted by heavy, wet snow 1% during the adverse weather event. Outages were primarily driven by snow accumulation on trees and equipment, with 83...
AI summary Cape Breton East experienced outages due to heavy wet snow, with 83% of customer hours of interruption (CHI) from a single event. 2,248 customers were impacted, totaling 15,729 CHI. Full restoration took 15.70 hours, with 99.87% of customers restored within 12 hours. Average restoration time was 3.74 hours, primarily caused by tree contacts and adverse weather.
Wind Wet Snow 23 83% SECTION 4: ZONE IMPACT SUMMARY – CAPE BRETON EAST TOP TWO EVENTS BY DURATION & CUSTOMER IMPACT Duration Max Weather Direction Wind Wind Customers Duration Zone Date/ Time Temp (°C) Cause Sub-Cause Description Station (...
AI summary A weather event on January 19, 2026, in Cape Breton East caused a tree to fall due to heavy wet snow, disrupting service for 1 customer over 10.13 hours. The incident was recorded as the top event by duration and customer impact in the zone.
Contacts contact the customer’s service East line. Cape Heavy, wet snow 1/19/2026 Adverse Breton Sydney 50 37 31 0 Wet Snow accumulation caused the 367 7.26 7:34 Weather East recloser to operate. Customer Impact Max Weather Direction Wind...
AI summary A weather event on January 19, 2026, involving heavy wet snow accumulation caused a recloser to operate in the Cape Breton and East zones, impacting 1,296 customers for 7.05 hours. The incident highlights system reliability challenges due to extreme weather conditions.
Wet Snow 1296 7.05 7:34 Weather caused the recloser to operate. East Cape 1/19/2026 Adverse Heavy, wet snow accumulation Breton Sydney 50 37 31 0 Wet Snow 532 7.15 7:34 Weather caused the recloser to operate. East
AI summary The document notes that heavy, wet snow accumulation on January 19, 2026, caused a recloser to operate, leading to a power interruption in the East region, affecting areas such as Cape Breton and Sydney.
Wet Snow 532 7.15 7:34 Weather caused the recloser to operate. East
AI summary Wet snow at 7:34 AM caused a recloser to operate, leading to an interruption. The event is documented with numerical data (532, 7.15) but lacks explicit discussion of broader themes beyond the immediate technical incident.
24 SECTION 5: COMPARISON TO SIMILAR OUTAGE EVENTS • The December 3, 2025 event is comparable to the January 18–19, 2026 storm in that both were driven primarily by heavy, wet snow, with tree contacts representing the dominant outage mechan...
AI summary The December 3, 2025, and January 18–19, 2026, outages were both driven by heavy, wet snow and tree contacts, with similar impacts in the Valley region. The January event affected more customers due to its broader geographic reach, though system response and outage drivers were comparable in similar regions.
rences in outage drivers or system response in regions with similar exposure and Resources characteristics. Available Peak Winds 59 km/h 98 km/h • The January 18-19 event also experienced a longer duration of hours around 0 degrees, so whi...
AI summary The document discusses challenges in forecasting wet snow events, noting that prolonged exposure to cold and heavy snow increased outages compared to similar weather events. Lessons include refining forecasting, enhancing regional resource sharing, and improving vegetation management coordination to strengthen system reliability and emergency response.
Loss of supply Interruptions due to problem in the bulk electricity system (transmission) SAIFI = Average Outage Frequency Tree contacts Interruptions caused by trees or tree limbs contacting energized circuits Customer interruptions / # o...
AI summary The text outlines metrics for power interruptions, including SAIFI (Average Outage Frequency), SAIDI (Average Outage Duration), and CAIDI (Average Outage Duration for affected customers), detailing causes such as tree contact, lightning, equipment failure, and adverse weather.
n , i c e s t o r m s , s n o w , w i n d s , extreme ambient temperatures, freezing fog, or frost) Customer hours of interruption / # of customer interruptions Adverse environment Interruptions due to equipment being subjected to abnormal...
AI summary The document categorizes causes of customer interruptions into adverse environments (e.g., extreme weather, equipment damage), human errors in utility operations, and foreign interference (e.g., animals, dig-ins). It emphasizes environmental, operational, and external factors impacting service reliability.