Heavy rain: 59 mm in 24 h expected in Nanoose Bay

Automated newsroom of weather-canada.com · Published 29 October 2026 · Updated 29 October 2026 · 3 min read

The model forecasts 59 mm of rain in 24 hours in Nanoose Bay (British Columbia) on 29 October 2026, above the local threshold of 30 mm. Such a total quickly saturates soils and drainage, especially if it falls within a few hours.

The figures

5 cities tracked by weather-canada.com in Canada exceed the 30 mm threshold for this phenomenon. The most affected is Nanoose Bay (British Columbia) with 59 mm on 29 October 2026. Other cities affected: Lantzville, Comox and Courtenay. The event is expected on 29 October 2026. These are model forecasts for the city's grid point, not measurements.

Cities affected

Timeline

For Nanoose Bay, the table gives the day-by-day forecast over 5 days. The most marked day is 29 October 2026, with 59 mm. The quantity shown is the hourly rain (mm) on the day of the peak, when it falls within 72 hours. The model resolves hours only over 72 hours: for an event that spans several days or is expected later, the daily forecast is the most reliable.

The map

The map locates the most affected cities in Canada (at most 5). Where several dots touch, the event is widespread; an isolated dot means a local event, caused by terrain or by a nearby lake or sea.

Historical context

No long climate series is attached to this phenomenon for Nanoose Bay: no nearby official station provides a comparable daily record in this site's data. The comparison is therefore limited to the city's 1991–2020 normal where one exists. A historical rank is shown only when a nearby reference station can place the value, rather than an invented ranking.

In Nanoose Bay, the 1991–2020 normal monthly total for October is 164 mm; the one-day rain forecast is 36% of it.

What it means

One millimetre of rain is one litre of water per square metre: 59 mm means 59 litres on every square metre of Nanoose Bay in a day. The local threshold of 30 mm comes from the estimated daily 95th percentile of the nearest reference station, with a floor of 30 mm, or is a fixed 50 mm when no station is close; crossing it does not mean a flood, but soil and rivers then have little margin.

What to do

• Stay away from riverbanks, underpasses and basements during the rain peaks: water rises faster than you think.
• Clear gutters, drains and gullies in front of your home before the episode, and move valuables off the ground floor and out of the cellar.
• Never cross a flooded road on foot or by car: 30 cm of water is enough to destabilise a vehicle. Check river levels if your municipality publishes them.

This page is a snapshot of the forecast of 29 October 2026. It is not changed afterwards, even if the model moves on: up-to-date forecasts are on the city pages linked on this page.

Method and limits

The figures in this article are computed automatically from the Open-Meteo forecasts for the cities tracked by weather-canada.com. An article is written only if a precise threshold is crossed (a 24-hour rainfall above the 95th percentile of the nearest reference station (fixed threshold of 50 mm without a reference series, never below 30 mm)), at most 2 times a week per country, and never twice for the same event. Forecasts are recomputed three times a day, so an event can be spotted up to eight hours late. A forecast is not a measurement and does not replace official warnings: check the official warnings (Environnement et Changement climatique Canada) before any decision.