Environment Canada is calling for a another thunderstorm in Edmonton.
Forecasters expect increasing cloudiness throughout the day Saturday with a 30 percent chance of showers this afternoon and a risk of a thunderstorm this evening. A high of 20 is expected.
Tonight, the forecast is mainly cloudy with 60 percent chance of showers and risk of a thunderstorm. Expect 20 km/h winds from the northwest with gusts to 40 km/h. The overnight low should be around 13 C.
Rainfall warning
West of the city, three regions are under heavy rainfall warnings.
“Extremely heavy” rain is expected in areas around Grande Prairie, Beaverlodge, Valleyview, Hinton, Grande Cache, Peace River, Fairview, High Prairie and Manning.
“So far, reports of 50 to 86 mm of rain has fallen in the last 24 hours,” the warning states. “Widespread rainfall totals of 70 to 90 mm are expected as heavy precipitation continues to impact the region.
“Higher amounts in excess of 125 mm are possible along the eastern slopes of the foothills and along the higher terrain near Grande Prairie.
“Enhanced precipitation amounts are also likely under slow moving thunderstorms. Heavy rainfall amounts are expected to lessen by Saturday evening.”
The downpours were expected to cause flash floods and water pooling on roads. The floods could be enough to sweep away bridges, culverts, buildings and people. Residents were asked to stay away from low-lying areas and be ready to move to higher terrain if needed.
Thunderstorm warning in northern Alberta
A severe thunderstorm warning has been issued for Fort McMurray and Fort McKay, while Fort Chipewyan and Wood Buffalo National Park are under a severe thunderstorm watch.
A trough of low pressure is expected to trigger thunderstorms. A few of these thunderstorms could become severe, according to Environment Canada.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are likely to produce or are producing one or more of the following: large hail, damaging winds, torrential rainfall.
jwakefield@postmedia.com
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Tonight Partly cloudy with 60 percent chance of showers. Risk of a thunderstorm this evening. Wind becoming northwest 20 km/h gusting to 40 this evening. Low 10.
Sun , 22 Jul A mix of sun and cloud. Wind northwest 30 km/h gusting to 50. High 21. UV index 7 or high.
Night A few clouds. Wind northwest 20 km/h gusting to 40 becoming light in the evening. Low 10.
Mon , 23 Jul A mix of sun and cloud. High 20.
Night Periods of rain. Low 11.
Tue , 24 Jul Showers. High 20.
Night Cloudy periods with 30 percent chance of showers. Low 11.
Wed , 25 Jul Cloudy. High 23.
Night Cloudy periods. Low 12.
Thu , 26 Jul A mix of sun and cloud. High 23.
Night Clear. Low 13.
Likelihood of Precipitation 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%
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