Windrose — Canada Precipitation Network Audit

Scope: 12 provinces and territories — full national assessment
Coverage: 10,261,304 daily records across 1,434 stations over 36 years
Key finding: 101 ghost stations. Zero EXCELLENT-rated stations in NWT or Nunavut. 82% of canonical reference city stations decommissioned — including Calgary, Edmonton, Vancouver, Winnipeg, Toronto, Halifax, and Regina.
Published: May 16, 2026 — 64 pages

📍 Explore Interactive Dashboard →

📄Request the Full 64-Page Report

The complete Canada Precipitation Network Reliability Report (May 2026) — 64 pages, 12 provinces and territories, full station-level classification dataset, and successor mapping for all 85 canonical city reference IDs — is available to institutional clients.

For actuarial teams, engineering consultancies, reinsurers, provincial ministries, and legal counsel. Province-specific reports, monthly monitoring subscriptions, and raw data exports also available.

Please include in your email: organization, role, and intended use. A response typically follows within one business day.

✉️ Request Access — adrian@windrose.news

Opens your default mail client. Or email directly: adrian@windrose.news

Founding client rate (30% off first engagement) available through June 16, 2026.

REPRODUCTION RUN

🍁May 2026 — National Reproduction

23.5%

Effective Failure Rate

29 problematic / 66 active

❄️ Nunavut

43.4%

36 problematic / 83 active

🧊 Newfoundland

37.1%

26 problematic / 70 active

⚜️ Quebec

34.1%

98 problematic / 287 active

Scope: Full 12-province ECCC inventory — 8,374 stations
Methodology: Identical to April 2026 national report — ECCC 5-category classification per Minister Dabrusin's response
Key finding: The April 2026 national findings reproduce in full one month later. 370 stations remain classified as ACTIVE_TRANSMISSION_ISSUE; effective failure rate among the 1,577 non-decommissioned stations holds at 23.5%. NWT (43.9%) and Nunavut (43.4%) remain the worst-performing jurisdictions, with zero EXCELLENT-rated stations in either. The pattern is structurally persistent — not a one-month artifact.

📍 View Interactive Dashboard →

🍁April 2026

21.2%

Effective Failure Rate

98 problematic / 287 active

🍁 Ontario

22.6%

48 problematic / 212 active

🌊 British Columbia

16.9%

49 problematic / 290 active

🌾 Alberta

11.5%

33 problematic / 287 active

Scope: Ontario • Quebec • Alberta • British Columbia (Full ECCC Inventory — 5,805 stations)
Methodology: ECCC 5-category classification per Minister Dabrusin's response
Key finding: Quebec remains worst at 34.1% (98 stations). British Columbia added for the first time: 49 problematic stations at 16.9% failure rate. Ontario stable at 48 stations (22.6%). Alberta unchanged at 33 stations (11.5%). All 228 classified as ACTIVE_TRANSMISSION_ISSUE — stations ECCC considers operational yet failing to deliver reliable precipitation records.

📍 View Interactive Map →

🍁March 2026

22.7%

Effective Failure Rate

98 problematic / 287 active

🍁 Ontario

22.3%

47 problematic / 211 active

🌾 Alberta

11.5%

33 problematic / 287 active

Scope: Ontario • Quebec • Alberta (Full ECCC Inventory — 4,058 stations)
Methodology: ECCC 5-category classification per Minister Dabrusin's response
Key finding: Quebec 34.1% failure — worst of three provinces. Zero improvement in Ontario (47) and Quebec (98) since February 2026. Alberta added for the first time: 33 problematic stations in the agricultural belt (Peace River, Red Deer corridor, Lethbridge). All 178 classified as ACTIVE_TRANSMISSION_ISSUE — stations ECCC considers operational yet failing to deliver reliable precipitation records.

📍 View Interactive Map →

🍁February 2026

29.1%

Effective Failure Rate

Scope: Ontario • Quebec (Full ECCC Inventory)
Methodology: ECCC 5-category classification per Minister Dabrusin's response
Finding: Quebec 34.1% failure vs Ontario 22.3% — 145 stations referred to NIRT

📍 View Interactive Map → V1 — SUPERSEDED

🍁January 2026

Scope: Alberta • Ontario • Quebec
Finding: Initial baseline audit — Ontario at 88.9%, Alberta at 82.0%, Quebec at 75.8%
Methodology note: V1 did not separate decommissioned stations from active failures. Superseded by V2 (February 2026 onward), which applies ECCC's five-category classification framework and reports the effective failure rate across the operational network only. For current methodology and findings, see the April 2026 report above.

📍 View Interactive Map →