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10°C

South Port Alberni, BC, Canada

Updated: 31/12/1969 07:35

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Yellow Warning - Rainfall

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4:26 a.m. PDT Wednesday 18 March 2026

Impact Level: Moderate

Forecast Confidence: High

Prolonged Atmospheric River Event

Where: Inland Vancouver Island

What and when:
- Periods of heavy rain continues this afternoon to Friday

Impacts:
-Prolonged heavy rain on snow combined with mountain snow melt could lead to very enhanced responses in river systems and potential for flooding.
-Extensive water pooling on roads and washouts may occur.
-Enhanced risk of landslides due to saturation of landscapes.

Remark:
An atmospheric river will remain over the South Coast of B.C. through Friday. With freezing levels near 2000 to 3000 metres, snowmelt from higher elevations may increase the impacts associated with this rainfall event.

Rain is expected to intensify again this afternoon to Friday under the influence of of the atmospheric river. The heaviest rainfall is expected Thursday night into Friday.

Water will likely pool on roads and in low-lying areas. Some travel delays are possible. Landslides may occur in vulnerable areas such as steep slopes, deforested areas or recent burn scars. Fast-moving and rapidly rising water can sweep vehicles away and damage infrastructure.

Watch for washouts near rivers, creeks and culverts.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to BCstorm@ec.gc.ca or post reports on X using #BCStorm.

In effect for:

Inland Vancouver Island

Observed at: Port Alberni Date: 7:00 AM PDT Wednesday 18 March 2026
Temp.: 8 °C Wind: calm km/h Humidity: 99 % Dew point: 8 °C Pressure: 101.3 kPa Tendency: 0.00 kPa Visibility: km	Sunrise: 7:27 Sunset: 19:29 Normals: Max 11°C Min 0°C

Extended Forecast - Environment Canada
Today Periods of rain Max: 12°C	Thu, 19 Mar Rain Max: 12°C	Fri, 20 Mar Showers Max: 13°C	Sat, 21 Mar Sunny Max: 8°C	Sun, 22 Mar Chance of showers Max: 8°C	Mon, 23 Mar A mix of sun and cloud Max: 10°C	Tue, 24 Mar Chance of showers Max: 9°C
Tonight Rain Min: 8°C	Night Rain Min: 9°C	Night Cloudy Min: 2°C	Night Chance of showers Min: 2°C	Night Chance of showers Min: 1°C	Night Chance of showers Min: 2°C

Forecast

Port Alberni, BC (Issued: 5:00 AM PDT Wednesday 18 March 2026)

Today: Periods of rain. Amount 5 to 10 mm. Wind becoming south 20 km/h gusting to 40 near noon. High 12. UV index 1 or low.
Tonight: Rain. Amount 10 to 15 mm. Low 8.
Thu, 19 Mar: Rain. Amount 15 to 25 mm. High 12. UV index 1 or low.
Night: Rain. Low 9.
Fri, 20 Mar: Showers. High 13.
Night: Clearing. Low plus 2.
Sat, 21 Mar: Sunny. High 8.
Night: Cloudy periods with 30 percent chance of showers. Low plus 2.
Sun, 22 Mar: Cloudy with 60 percent chance of showers. High 8.
Night: Cloudy with 60 percent chance of showers. Low plus 1.
Mon, 23 Mar: A mix of sun and cloud. High 10.
Night: Cloudy with 60 percent chance of showers. Low plus 2.
Tue, 24 Mar: Cloudy with 60 percent chance of showers. High 9.

24 Hour Forecast - Port Alberni, BC

Date/Time	Temp. (°C)	Weather Conditions	LOP †	Wind (km/h)
18 March 2026
8 AM	7	Periods of rain	100	S 15
9 AM	8	Periods of rain	100	S 15
10 AM	10	Periods of rain	100	S 15
11 AM	11	Periods of rain	100	S 15
12 PM	11	Periods of rain	100	S 20 gust 40
1 PM	12	Periods of rain	100	S 20 gust 40
2 PM	12	Periods of rain	100	S 20 gust 40
3 PM	12	Periods of rain	100	S 20 gust 40
4 PM	11	Periods of rain	100	S 20 gust 40
5 PM	11	Periods of rain	100	S 10
6 PM	11	Rain	100	S 10
7 PM	10	Rain	100	S 10
8 PM	10	Rain	100	VR 5
9 PM	10	Rain	100	VR 5
10 PM	9	Rain	100	VR 5
11 PM	9	Rain	100	VR 5
19 March 2026
12 AM	9	Rain	100	VR 5
1 AM	8	Rain	100	VR 5
2 AM	8	Rain	100	VR 5
3 AM	8	Rain	100	VR 5
4 AM	8	Rain	100	VR 5
5 AM	8	Rain	100	VR 5
6 AM	8	Rain	100	VR 5
7 AM	8	Rain	100	VR 5

† Likelihood of Precipitation (LOP) as described in the public forecast as a chance of measurable precipitation for a period of time. Nil: 0% Low: 40% or below Medium: 60% or 70% High: Above 70%

Environment Canada