Prairie Weather (Rural Roots Canada) – A chiller thriller for Halloween Week across the Prairies.
The storm that crossed the Prairies over the weekend is gone, and the pattern resets into something quiet. And cool. The next low off the Pacific Northwest coast does not move inland. It rides south along the coast, as several predecessors have. By midweek, a blocking pattern sets up over the Pacific, which sends northwest flow into western Canada. That flow brings cooler air at times, but nothing bitterly cold. Expect dry weather and near-average temperatures, with a few pushes of colder air.
This fits the El Niño pattern. The active storm track favours the southern United States, and the Prairies spend much of the season between systems to the north and south. That said, a quiet winter can still produce disruptive storms.
Harvest Update
The October 20 Alberta crop report shows the harvest in the province has reached 94 per cent. The south and central regions are virtually done; the North East and North West sit at 91 and 92 per cent, and the Peace trails behind at 81 per cent. The report blamed moisture in the crop and in the field, with cooler temperatures limiting daily drying. Yields run 60 per cent above the five-year average in the south, 24 per cent above in the central region and 14 per cent above in the Peace.
Saskatchewan reached 93 per cent as of October 12, with canola at 89 per cent, flax at 73 per cent and soybeans at 53 per cent. Do not expect an update this week. The province will not publish a report for October 20 to 26, and the final report of 2026 arrives November 5.
Manitoba reported 86 per cent complete in its October 21 update, with the northwest at 77 per cent and the southwest at 78 per cent. Canola sits at roughly 85 to 90 per cent depending on the region, and soybeans range from 60 to 80 per cent. Spring wheat is nearly finished, though quality has slipped and much of what remains looks like feed grade.
The last few percentage points are the hardest. Whatever stands in the Peace, in northern Alberta and on Manitoba’s soybean and canola acres, now faces freezing nights and shorter days. Prairie weather is much less co-operative than it once was.
Monday
Peace Region
Clear, calm and cold under a ridge of high pressure. There will be abundant sunshine, but we’re in the time of year when that doesn’t have a lot of influence on temperature. Afternoon highs reach about 0 to 4. Overnight lows drop into negative double digits, and any moisture left on the ground freezes. Expect icy patches on yard approaches and gravel roads in the morning.
Alberta
A high-pressure system sits over the province, bringing sunshine, light winds and a hard freeze overnight. Mist or fog is possible in southern areas before sunrise, with a modest chance that visibility falls sharply for a few hours. Afternoon highs reach about 2 to 7, and the south runs mildest. In areas where snow is left on the ground from the weekend, it will melt slowly in shaded spots.
Saskatchewan
High pressure builds in with clear skies and calm winds. Lows early Monday morning fall between minus 5 and minus 10 in many areas, and afternoons reach the low to mid single digits. Canola or flax still standing will be stiff with frost in the morning and tough until the warmer afternoon weather.
Manitoba
Northerly flow behind the departed low keeps things cool, and the wind will ease through the day as the system pulls farther into Hudson Bay. Lingering flurries in the north taper off. Afternoons reach about 1 to 5 in the south, with lows between minus 3 and minus 8.
Tuesday
Peace Region
Sunny and dry, but cold. Temperatures could stay below zero through the day, with highs around -2, after early morning lows in the -10 to -12 degree range. Tuesday night, under a clear sky, the frosty weather continues, with lows near minus 5 to minus 9 in sheltered low spots.
Alberta
Another dry, sunny start to the day, but things could get interesting in the afternoon. Temperatures edge up to about 3 to 8 across the south but only -1 to -3 in the north. A weak low develops in southeastern Alberta during the midday, causing light snow in southeastern Alberta. A westerly wind will develop behind the low as it moves east into Saskatchewan, and snow in southeastern Alberta will change to rain. At the same time, a developing low in BC will spread snow into the central Rockies, possibly as far east as Highway 2 between Red Deer and Edmonton. And, snow will form along an inverted trough from the Low in southern Saskatchewan north toward the Cold Lake – Fort McMurray region. The map below shows how much snow is expected to fall in BC and Alberta on Tuesday:
Frost overnight is almost certain, and the coldest readings settle in river valleys and low pasture.
Saskatchewan and Manitoba
Similar to Alberta, the day will begin with sunshine and dry weather, but as a low-pressure system develops in southeastern Alberta and moves into Saskatchewan during the day, it will spread precipitation across Saskatchewan and southern Manitoba. The map below shows how the system will cross Saskatchewan and Manitoba between Tuesday morning and Wednesday midday:
Across Manitoba and Saskatchewan Tuesday, highs will stay below freezing, in the -3 to -7 degree range. It may be a bit warmer in southwestern Saskatchewan, with afternoon temperatures ranging from 0 to 3.
Wednesday
Peace Region
A high supplies the flow, a low supplies the snow. The circulation around a high-pressure system in Yukon will generate a cold northerly flow into the Peace region Wednesday. Meanwhile, a low in northern Saskatchewan will spread snow back across northern Alberta into the Peace on both sides of the boundary. It will be cold, with temperatures ranging from -5 in the early morning to -2 in the afternoon. Snowfall totals may range from 0 in the northern Peace to 10 cm in the southern part of the region.
Alberta
It will be a snowy day across most of Alberta, except for the southeastern part of the province. 15-20 cm of snow can be expected in the Wood Buffalo area: 5-10 cm in the foothills and Rockies. Elsewhere, snowfall totals will be lower, and snow will be insignificant between Highway 2 and Saskatchewan, south of the Yellowhead. Afternoon temperatures across the province could stay below zero, ranging from -1 to -5.
Saskatchewan
It’s fair to say most of central and southern Saskatchewan will be dry most of the day with sun and increasing cloud. A low-pressure system will provide snow to the north. Some of that snow will drift southward early Thursday. But for Wednesday, expect afternoons to reach about 3 to 7. Lows fall between minus 3 and minus 7, a touch milder in the southwest where cloud thickens.
Manitoba
Quiet and dry with a mix of sun and cloud, and a mild southerly wind. Afternoons reach about 3 to 8, and lows run minus 2 to minus 6.
Thursday
Peace Region
As high pressure rebuilds over northern Alberta, the snow will taper off during the day across the BC and Alberta Peace region. Accumulations will be minimal. Mostly dry and cooler as northwest flow strengthens. Temperatures will stay steady in the -4 to -6 degree range throughout the day.
Alberta
A cold front brings a push of cooler air, and guidance disagrees on the details. Expect a mix of sun and cloud, with a chance of flurries or light showers, crossing the province from north to south throughout the day. A trace to light coating is the most likely outcome. This is not a big snow maker. Temperatures will likely remain below freezing all day, in the -1 to -5 range.
Saskatchewan
A northern low-pressure system will keep the snow machine on for the northern half of the province Thursday. We may see some snow bands crossing central Saskatchewan during the midday. The south should remain generally dry. Cloud increases ahead of the cooler air, approaching from the west. The western side of Saskatchewan, along with the north, will remain sub-zero all day. Central and southeastern Saskatchewan can expect highs above zero. But it won’t be as warm as Manitoba (read below).
Manitoba
Cloudy to partly cloudy, mild ahead of the front. Afternoons reach about 3 to 8, maybe as warm as 10. The front arrives later, so precipitation chances stay low through the day.
Friday
Peace Region
Sunny, dry and cold, with afternoons around -3 to -6. Frost follows overnight, with lows near minus 6 to minus 10. There is considerable uncertainty over temperatures (it may be warmer), and we’ll be quite a bit more definitive in our update Thursday.
Alberta
Flurries in southern Alberta end early, and skies clear from west to east. Afternoon temperatures reach about 1 to 5. Wet ground refreezes overnight, so yard surfaces and rural roads turn slick by morning, especially in the south.
Saskatchewan
Lingering flurries in the south clear out. Accumulations will be very light, and in southeastern Saskatchewan, it will likely be warm enough for some of the accumulated snow to melt. Afternoons reach about 1 to 5. Lows fall between minus 4 and minus 9 where skies clear.
Manitoba
A low-pressure system to the southwest in the United States will push moisture into southern Manitoba. The moisture is coming in on a warm front, so it will be warm enough for the precipitation to be in the form of rain. There won’t be significant rainfall, just enough here and there to dampen the ground. Highs in southern Manitoba will reach the 4 to 7 degree range.
Saturday (Halloween) and Sunday
Peace Region
Halloween on Saturday is dry and cold. Afternoon temperatures reach about 0 to 4, then drop below freezing soon after sunset. Trick-or-treaters will need winter coats, warm boots and mitts over the costume. Skies stay mostly clear, so the stars and the cold both come out early. Sunday is dry and warmer, with afternoons around 6 or 7 degrees.
Alberta
Saturday is dry in most areas, and afternoons reach about 1 to 6. For trick-or-treating, expect temperatures near 0 at the start of the evening and falling toward minus 3 to minus 5 later. Chinook conditions develop Saturday, and should be in full force Sunday. That makes temperature forecasting difficult, but it’s safe to say highs will range from 5 to 8 degrees. The chinook wind is not expected to be strong. We will have more and better information on this in our midweek update Thursday. Sunday’s a good day for equipment prep, and fall tillage can continue where the ground is not frozen.
Saskatchewan
Saturday brings a mix of sun and cloud, with afternoons around 1 to 5. Trick-or-treating looks dry across most of the province. Temperatures fall below freezing through the evening, and winds stay light, so wind chill should not be a factor. A lined jacket under the costume covers most situations. Sunday is dry and seasonably cool, with afternoons around 2 to 6 and lows between minus 3 and minus 8. Expect some light snow in the northern half of Saskatchewan during the second half of the day.
Manitoba
Rain continues in southern Manitoba Saturday afternoon, and through the night into Sunday morning. And yes, for many parts of southern Manitoba, it may be raining during the trick-or-treating hours. Rainfall accumulations will be minor, as shown below. The map shows rainfall totals for both Saturday and Sunday in southern Manitoba:
Afternoon temperatures Saturday reach about 2 to 6. Roads stay mostly clear. Sunday, the rain moves into northwestern Ontario, but it could take all day to leave the province from west to east. Afternoon temperatures should reach 2 to 7 with the wind remaining light.
EVENT FORECAST
October 29 – Mainly sunny, high 10
