The Automated Weather Observation System (AWOS) aerodrome routine meteorological report (METAR) at Kuujjuarapik, QC (CYGW) was unserviceable (u/s) from 142315Z until 150140Z. The Terminal Aerodrome Forecast (TAF) was cancelled. The technical operations coordinator (TOC) was advised.

At Sandspit, BC (CYZP), the Automated Weather Observation System (AWOS) and Voice Generator Module (VGM) were unserviceable (U/S). The Technology Operations Coordinator (TOC) has been notified. No significant impact on operations.

Due to the failure of the High Level, AB (CYOJ) Automated Weather Observation System (AWOS) and no overnight weather observations, there was no aerodrome forecast (TAF) created for CYOJ. NOTAM I2718/22, indicating the aerodrome routine meteorological report (METAR) was not available, was issued for the overnight period. The TAF was created at 1429Z after the Human Weather Observation System (HWOS) observation started. Unknown impact.

Delayed entry as a result of NAV CANADA safety and evaluation quality assurance (QA) review: The Red Deer, AB (CYQF) aerodrome routine meteorological report (METAR) information was not available from the Automated Weather Observation System (AWOS). Technology Operations Coordinator (TOC) advised, estimated return to service not known. The Terminal Aerodrome Forecast (TAF) was cancelled.

The Automated Weather Observation System (AWOS) frequency 128.725 MHz was unserviceable (U/S) at Yorkton, SK (CYQV). The aerodrome routine meteorological report (METAR) was unavailable shortly after 1600Z. Due to METAR outage, the terminal aerodrome forecast (TAF) was cancelled. The Technology Operations Coordinator (TOC) was advised.

The Stony Rapids, SK (CYSF) Automated Weather Observation System (AWOS) weather elements were missing from the aerodrome routine meteorological report (METAR). NOTAM issued and Terminal Aerodrome Forecast (TAF) cancelled. Operational impact unknown.

The Dauphin (YDN) Automated Weather Observation System (AWOS) was unserviceable (U/S) due to an ongoing power outage at the Dauphin airport. Aerodrome forecast (TAF) cancelled. Impact unknown.

Upon the station opening at 1300Z, the Flight Service Station (FSS) noticed the weather data entry (WDE) displayed "No METAR [aerodrome routine meteorological report]". Voice Generator Sub-System (VGSS) (Automated Weather Observation System (AWOS) switch) was in the "on" position and activated. The FSS tuned frequency 128.225 MHz on the back-up radio (TIL) to check the operation of AWOS. The TIL indicated "High Level automated weather observation system not reported". The Flight Information Centre (FIC) and the Technology Operations Coordinator (TOC) were notified. Unknown impact on operations.

At Medicine Hat, AB (CYXH) the Human Weather Observation System (HWOS) software was frozen and prevented Automated Weather Observation System (AWOS) from transmitting weather after 1000Z until HWOS was rebooted at 1235Z. Operational impact unknown.

At Yorkton, SK (CYQV), the terminal aerodrome forecast (TAF) was cancelled due to missing Automated Weather Observation System (AWOS) sensor data. No known operational impact.

The instrument landing system (ILS) 09 and the Weather Information Display System (WIDS) failed at Fredericton, NB (CYFC). No current wind or altimeter readings were available. Also, there was no access to the Automated Weather Observation System (AWOS) information. The Technology Operations Coordinator (TOC) was advised. TOC advised the problem would be resolved at 0900Z.

The Aerodrome Forecast (TAF) in Natashquan, QC (CYNA) was unavailable at 1940Z due to an Automated Weather Observation System (AWOS) failure at 1741Z.

The Val-dOr (YVO) flight service station (FSS) reported that the Automated Weather Observation System (AWOS) screen was frozen. The 0200Z weather information was faxed to the Flight Information Centre (FIC). Technology Operations Coordinator (TOC) notified.

Aviation Incident Report #16985: A Evolution Flight School Inc. Piper PA-38-112 (C-FNGU) from Trois-Rivières, QC (CYRQ) to Quebec/Neuville, QC (CNV9) performed a take-off under VFR conditions at CYRQ when the weather conditions were below VFR minima. CYRQs aerodrome routine meteorological report (METAR) at 1601Z indicated 1.75SM visibility and CYRQs Automated Weather Observation System (AWOS) at 1644Z indicated 1SM visibility.

There was a loss of all Automated Weather Observation System (AWOS) sensors at Kuujjuarapik, QC (CYGW). The Technology Operations Coordinator (TOC) was advised.

The LYTTON Automated Weather Observation System (AWOS) was unserviceable. The Vancouver Flight Information Region (CZVR) Technology Operations Coordinator (TOC) requested that a NOTAM be issued. The NOTAM office rejected the NOTAM request. The AWOS was unserviceable and without a NOTAM in place from 1025Z to 1200Z.

The Sandspit, BC (CYZP) Automated Weather Observation System (AWOS) was unserviceable (U/S). No aerodrome routine meteorological report (METAR) or terminal aerodrome forecast (TAF) was available.

At Sandspit, BC (CYZP), the Technical Operations Coordinator (TOC) advised that, due to a power failure, frequency 122.3 MHz, runway lighting, and the Automated Weather Observation System (AWOS) were unserviceable. No operational impact.

Sandspit, BC (CYZP) advised of a power outage. All equipment was unserviceable (U/S), which included frequency 122.3 MHz, runway lights, the instrument landing system (ILS) and the Automated Weather Observation System (AWOS).

At Dryden, ON (CYHD), the Automated Weather Observation System (AWOS) stopped sending aerodrome routine meteorological report (METAR) data after 0700Z. The terminal aerodrome forecast (TAF) was cancelled.

A Hydro One Networks Inc. Aerospatiale AS350 B3 (C-GHOY) departed from Dryden, ON (CYHD) in 1/4 mile visibility (VIS), reportedly. The pilot had submitted a pilot weather report (PIREP) indicating that VIS and ceiling were unlimited. The Sioux Lookout flight service specialist (FSS) checked the cameras, and they showed the same thing, but only two were operational, so the specialist was unable to override the Automated Weather Observation System (AWOS) for authorization. Also, only 5 minutes after, a second aircraft, a North Star Air Ltd. Pilatus PC-12/45 (C-GKAY/BF707) from Thunder Bay, ON (CYQT) to Dryden, ON (CYHD), achieved a visual on the airport 15 miles back and through 070, which confirms C-GHOYs report.

The Muskoka, ON (CYQA) airport staff advised of a power outage at CYQA. The aerodrome lighting, Automated Weather Observation System (AWOS), mandatory frequency (MF) 122.3 MHz, and the direction finder (DF) were all unserviceable (u/s) during the outage. The Technology Operations Coordinator (TOC) was advised. The London flight information centre (FIC) was advised. Power returned at 1320Z. All the equipment except for the DF returned to normal. Air traffic services (ATS) were not provided during the outage.

While conducting a military parachute training operation at Muskoka, ON (CYQA), one jumpers parachute came into contact and damaged an antenna on the Automated Weather Observation System (AWOS). The jumper was not injured. The parachute was removed and the Technology Operations Coordinator (TOC) was notified. Wind information at CYQA was not available.

When the flight service station (FSS) opened, a Pacific Coastal Airlines Ltd. (PASCO) pilot mentioned that when they were coming in during closed hours, the automatic terminal information service (ATIS) was still broadcasting "information P", rather than broadcasting the Automated Weather Observation System (AWOS). The pilot mentioned that the wind differed greatly from the broadcasted information.

At High level, AB (CYOJ), due to a telecommunications failure, the Automated Weather Observation System (AWOS)/Human Weather Observation System (HWOS) failed. This resulted in the terminal aerodrome forecast (TAF) being cancelled at 1243Z. Unknown impact.

At some point after 102111Z, the Stony Rapids, SK (CYSF) Automated Weather Observation System (AWOS) communications link became unserviceable (U/S). Aerodrome routine meteorological report (METAR) unavailable. Information available locally on Voice Generator Module (VGM) 128.75 MHz. NOTAM issued. Impact on operations unknown.

The Medicine Hat (YXH) flight service station (FSS) advised that all the Automated Weather Observation System (AWOS) sensors and the Voice Generator Module (VGM) were serviceable locally, but AUTO observations are not being transmitted when the station is closed. The Technology Operations Coordinator (TOC) was advised.

An Automated Weather Observation System (AWOS) failure occurred at 2100Z. Technology Operations Coordinator (TOC) advised.

The Buffalo Narrows, SK (CYVT) Automated Weather Observation System (AWOS) did not report from 1700Z to 2100Z. Aerodrome forecast (TAF) cancelled. No impact on operations.

The community aerodrome radio stations (CARS) of CYLC, CYMU, CYAS, CYLA, CYTQ, CYLU and CZEM did not provide services as published. Impact on operations unknown.
UPDATE: Aviation Incident Report #17162: At Kimmirut, NU (CYLC), the Automated Weather Observation System (AWOS) was inoperable. The CYLC community aerodrome radio station (CARS) was not reporting as per published times in the Canada Flight Supplement (CFS), causing passenger and cargo flight delays and cancellations.

At 1957Z, the Technology Operations Coordinator (TOC) advised the Regina (YQR) flight service station (FSS) that YQR radio (RDO) at Yorkton, SK (CYQV), frequency 119.65 MHz, and the Automated Weather Observation System (AWOS) Voice Generator Module (VGM) frequency 128.725 MHz at CYQV were unserviceable (U/S) due to a commercial power outage. TOC issued NOTAMs until 222359Z. Impact on operations unknown.

A Missinippi Air-Care Beech 200 (C-GOGT/MA03) from The Pas/Grace Lake, MB (CJR3) to Norway House, MB (CYNE) conducted a missed approach due to inaccurate weather information from the CYNE Automated Weather Observation System (AWOS). AWOS reported a clear sky (SKC) while ceilings were below minimas. No operational impact.

A Missinippi Air-Care Beech 200 (C-GOGT/MA03) from Winnipeg/James Armstrong Richardson, MB (CYWG) to Norway House, MB (CYNE) conducted a missed approach due to weather (WX) being below IFR minimums. The pilot had been unaware of the weather conditions due to no weather information being available via the aerodrome routine meteorological report (METAR) or the Automated Weather Observation System (AWOS)/Voice Generator Module (VGM). No other known impact to operations.

Testing of the backup generator at the Fort McMurray, AB (CYMM) airport caused multiple pieces of equipment to become unserviceable: the instrument landing system (ILS) 26, the runway visual range (RVR) 26, the Wind and Altimeter Digital Display System (WADDS), and the Automated Weather Observation System (AWOS), which was missing weather (WX), visibility (VIS), precipitation (PCPN) and icing (ICG) information. The Technology Operations Coordinator (TOC) was advised.

At Stony Rapids, SK (CYSF), the Automated Weather Observation System (AWOS) was reporting incorrect visibility. The Technology Operations Coordinator (TOC) was notified. NOTAM issued.

At Fond-du-Lac, SK (CZFD), the Automated Weather Observation System (AWOS) was unserviceable (U/S) until 2101211800Z. NOTAM issued.

At St. Anthony, NL (CYAY), frequency 122.3 MHz, the Automated Weather Observation System (AWOS) and the Weather Information Display System (WIDS) were unserviceable (U/S), due to a telecommunications issue.

At 2322Z, a Human Weather Observation System (HWOS) alarm was received that indicated that the Automated Weather Observation System (AWOS) temperature data was missing. Subsequent alarms showed other sensor failures.

The Automated Weather Observation System (AWOS) at Kuujjuarapik, QC (CYGW) was unserviceable as of 05Z. The Terminal Aerodrome Forecast (TAF) was cancelled. The Technical Operations Coordinator was advised (ADZ).

A power failure occurred at 1614Z in Inukjuak, QC (CYPH). The Automated Weather Observation System (AWOS), the remote communications outlet (RCO) and the non-directional beacon (NDB) were unserviceable (U/S), due to a defective generator. Peripheral station (PAL) frequencies 119.15 MHz, 132.675 MHz and Edmonton PAL frequency 135.3 MHz were serviceable (SVBL) on batteries, i.e. static uninterruptible power unit (SUPU). Power current re-established at 1649Z. No impact on operations.

The following information was missing from the automated weather observation system (AWOS) at Chibougamau/Chapais, QC (CYMT): wind (WND), cold (CLD), weather (WX), visibility (VIS), precipitation (PCPN) and icing (ICG). This was due to a power failure. No impact on operations (VFR weather).

Aviation Incident Report #16605: Air Inuit dispatch reported that on May 03, the universal communications (UNICOM) of Inukjuak, QC (CYPH) did not issue a new runway condition report during the day, while observations from the Automated Weather Observation System (AWOS) reported light snowfall.

Several aircraft reported that the French frequency 125.15 on the Automated Weather Observing System (AWOS) at Kuujjuarapik, QC (CYGW) was out of service. The technical operations coordinator (TOC) was notified and a NOTAM was issued.

A power outage led to missing data in the Automated Weather Observation System (AWOS) at Natashquan, QC (CYNA) between 0900Z and 1300Z. Only the altimeter and temperature were available. The terminal aerodrome forecast (TAF) was cancelled at 1338Z. Unknown impact on operations.

The Vancouver Technical Operations Coordinator (TOC) called to the Kamloops flight information centre (FIC) and requested that two NOTAMs be disseminated. The Revelstoke remote communications outlet (RCO) frequencies 122.375 MHz and 126.7 MHz were unserviceable and the Automated Weather Observation System (AWOS) was unserviceable due to a power outage.

The Pickle Lake, ON (CYPL) Automated Weather Observation System (AWOS) was unable to produce an aerodrome routine meteorological report (METAR) due to a power failure. Terminal aerodrome forecast (TAF) cancelled at 2000Z. Impact to operations unknown.

An Air Creebec de Havilland DHC-8-106 (C-FDWO/CRQ704) on a flight from Moosonee, ON (CYMO) to Kingston, ON (CYGK) departed CYMO IFR when aerodrome routine meteorological report (METAR) showed 1/4SM visibility. CRQ704 indicated that they had the Automated Weather Observation System (AWOS) and showed 1/2SM. Toronto Centre was advised.

Aviation Incident Report #16932: At 1509Z, an Alberta Central Airways Ltd. Beech B200 (C-FSUG) from Cold Lake, AB (CYOD) to Edmonton, AB (CYEG) called the Cold Lake terminal on 124.5 MHz for IFR clearance from CYOD to CYEG. The terminal controller issued the IFR clearance. At 1510Z, C-FSUG requested taxi clearance on 126.2 MHz (tower frequency) for a departure from Runway 31R. The tower informed C-FSUG that visibility was below taxi minima at 1/4SM and asked for C-FSUGs intentions. The aircraft indicated it would wait and the tower acknowledged. At 1512Z, C-FSUG called the tower on 126.2 MHz and indicated that from its position, visibility appeared closer to 1SM. The tower acknowledged and asked if the aircraft intended to taxi. The pilot indicated they would like to taxi and believed that there might be something wrong with "the sensor" (possibly referring to an Automated Weather Observation System (AWOS) sensor for ground visibility values). At CYOD, a meteorological observer reports the ground visibility (it is not an automated system). At 1513Z, C-FSUG indicated it was ready for departure. At 1516Z, C-FSUG was issued take-off clearance and departed from Runway 31R IFR without further incident. The latest METAR at the time was: "METAR CYOD 201500Z 13002KT 1/4SM +SN OVC020 M06/M07 A2924 RMK SN4SC4 SLP940=".

At High Level, AB (CYOJ), the Automated Weather Observation System (AWOS) visibility sensor was indicating IFR conditions (i.e. visibility variable (VRB) 1-2), but actual visibility was 15. The Technical Operations Coordinator (TOC) advised that they will create NOTAM while the station is closed.

At Churchill, MB (CYYQ), after the 0700Z aerodrome routine meteorological report (METAR) was issued, the handheld Vaisala thermometer stopped working. As the Automated Weather Observation System (AWOS) was unserviceable (U/S) at the time, there is no way to provide temperature and humidity data in the METAR. The Technical Operations Coordinator (TOC), Area Control Centre (ACC) Shift Manager (SM), and the Winnipeg (YWG) flight information centre (FIC) were advised. Operational impact: Full weather information was not available for aircraft (A/C).