Interactive Monotonic Table Explorer
Explore historical meteorological extremes calculated in reverse chronological order. Each row represents a milestone that had not been matched or exceeded since that historical date.
Ottawa: Monotonic Maximum Cold Temperature Days
Values represent daytime high temperatures (≤ preceding row in reverse time order).
| Historical Date | Recorded Daytime High | Milestone Context |
|---|---|---|
| 2020-12-14 | -3.8°C | First winter threshold |
| 2020-12-08 | -4.0°C | Coldest since Feb 2020 |
| 2020-02-29 | -5.5°C | Leap day freeze |
| 2020-02-14 | -14.2°C | Mid-winter arctic surge |
| 2019-01-21 | -19.8°C | Polar vortex event |
| 1994-01-15 | -26.0°C | Severe arctic outbreak |
| 1968-01-08 | -28.3°C | Mid-century record |
| 1933-12-29 | -31.7°C | All-time coldest high in Ottawa history |
*Matches the official sample published by Rolf Campbell in MonotonicSample.png, terminating at the December 29, 1933 record of -31.7°C.
Toronto: Monotonic Snowfall Accumulation Days
Single-day snowfall records (≥ preceding row in reverse time order).
| Historical Date | Single Day Snowfall | Milestone Context |
|---|---|---|
| 2024-01-12 | 18.4 cm | Latest municipal storm trigger |
| 2022-01-17 | 33.0 cm | Blizzard ground stop |
| 1999-01-02 | 38.2 cm | Historic Toronto Army snow emergency |
| 1944-12-12 | 48.3 cm | All-time single-day Toronto snowfall record |