Prairie Weather This Week – Midweek Update Oct 8

Manitoba and most of Saskatchewan will largely avoid the worst of the storm, but Alberta is facing its first significant snowfall of the season. The timing could affect both harvest operations and Thanksgiving travel, particularly in western and central Alberta.

As of Thursday, October 8, Environment Canada had issued a Special Weather Statement for parts of Alberta, warning of significant snow possible Saturday.

The map shows the area covered by a Special Weather Statement. This does not mean significant snow is going to fall everywhere shaded in gray on the map. The details will be fine-tuned as the storm develops and gets closer. If significant snow is expected, it will be reflected with more precision in Environment Canada’s warnings, which can be found here: http://weather.gc.ca. Check for warnings before doing any Thanksgiving travel this weekend.

Thursday

Peace Region

Rain spreads into the region later today as the approaching low organizes over BC. Steady rain is expected to develop and continue building, with totals potentially reaching 40 mm in spots by Friday. Highs will only reach the high single digits. No frost risk tonight with cloud and rain cover holding temperatures up.

Alberta

Rain begins spreading across areas north of the Yellowhead Highway later today as the low pushes inland, with clouds increasing province-wide. Prior to the system’s arrival, temperatures ahead of the front still reach the upper teens, best across the south. Temperatures may even reach the low 20s along the Milk River Ridge, near the US border. No frost risk tonight.

Saskatchewan

Dry weather is expected today ahead of the incoming system, with precipitation expected to track into central Saskatchewan overnight. Highs should reach the upper teens to low 20s, and increasing cloud cover will prevent any frost risk.

Manitoba

Dry and mild weather continues in Manitoba Thursday. Highs reach the upper teens to low 20s under southerly flow drawing warm air north ahead of the low approaching from the west. That system is still at least a day away. No frost risk.

Friday

Peace Region

Rain continues and begins changing to snow over higher terrain as colder air works in behind the deepening low. This looks like the first accumulating snowfall of the season for higher elevations in and around the Peace region. Lower-lying areas may see a rain-snow mix later in the day. Highs will be in the 2 to 4 degree range, which will prevent any serious accumulations in low-lying areas Friday. Much of the snow that falls will melt, especially on paved surfaces.

Alberta

The low deepens rapidly as it crosses the province Friday. Ahead of it, temperatures can still reach the upper teens, particularly in the south, but a strong push of colder air develops behind the system late today into Saturday. Rain changes to snow over the foothills and mountains, with areas like the higher foothills terrain, including the Hinton and Grande Cache areas, likely seeing a deep coating of heavy, wet snow. Highs vary widely Friday, from near 20 ahead of the front in the south to single digits where the cold air has already arrived.

Saskatchewan

Precipitation moving out of Alberta tracks into central Saskatchewan through the day, starting as rain. Southern Saskatchewan stays on the warm side of the system longer, with highs reaching the upper teens to low 20s, even approaching the mid-20s in the far south. No frost risk in the warm southern sector; central and northern areas should watch for changing conditions as the day progresses.

Manitoba

Still mild and mostly dry through the day as the system approaches from the west, with precipitation reaching central Manitoba and the Interlake later in the day or evening. Southern Manitoba holds onto the warmth, with highs in the upper teens to low 20s. No frost risk.

Saturday

Peace Region

The storm’s core influence is strongest Saturday. Precipitation continues, with accumulating snow likely for many higher-elevation areas and a real chance of snow spreading into lower-lying parts of the region as the cold air mass settles in. Highs will be consistent with Thursday, generally in the low single digits in the hardest-hit areas, with wind adding to the chill. Travel conditions could deteriorate quickly. Be prepared to change plans if you’re wanting to travel Saturday for the Thanksgiving holiday weekend.

Alberta

Accumulating snow is expected across many areas of the province Saturday, with the heaviest totals, potentially exceeding 20 cm, in the western mountain parkland and foothills. Snow may spread into the Calgary-Edmonton corridor and east along the Yellowhead, though amounts there remain less certain and likely lighter than farther west. Highs will likely remain below freezing in the west and mountain parks, while areas farther east will be slightly warmer, with highs into single digits. This is shaping up as a genuinely disruptive travel day for anyone moving through central Alberta.

Saskatchewan

Precipitation tracks into central and northern Saskatchewan, transitioning from rain to wet snow overnight and through the day as cold air wraps into the low. A swath of 20 to 30 mm of precipitation is likely across north-central parts of the province, though snowfall accumulation should be limited by recent warm ground and air temperatures. Southern Saskatchewan stays largely on the dry, warm side of this system, with activity concentrated across the northern half of the province. Regional highs run cold in the north, single digits, while the south holds onto milder air, certainly reaching the high teens, potentially into the 20s.

Manitoba

Precipitation reaches central  Manitoba and persists through Saturday night, starting as rain and transitioning to wet snow in the north as colder air wraps in. Southern Manitoba, including most agricultural territory, stays warm and largely dry. Two seasons in one province. It will feel like winter in the north, and summer in the south, with highs still reaching into the 20s, a genuinely pleasant start to the long weekend for that part of the province. No frost risk in the south today; the north sees a sharper temperature drop as the system works through.

Sunday

Peace Region

Snow tapers off from north to south as the system finally clears out, with conditions beginning to improve through the day. It stays chilly behind the departing low, with only a slight warming trend as temperatures reach the mid-single digits. A very cold night is likely behind this system; frost and freezing temperatures are a real concern Sunday night for anything still exposed.

Alberta

Snow continues tapering off from north to south through the day, with clearing conditions developing behind it, though it stays cold. Highs run from near freezing in the mountain parks to low single digits elsewhere. Overnight lows drop well below freezing in many areas. This is a hard frost, not a marginal one, so anything still standing in the field is at risk Sunday night.

Saskatchewan

Colder air now spreads into southern Saskatchewan as the system finally clears the province, a sharp contrast from Friday and Saturday’s warmth. Regional highs fall into the single digits to low teens depending on location. Frost risk climbs significantly overnight, especially in central and northern areas already affected by the system.

Manitoba

Colder air begins pushing into the province today, a noticeable change from the warmth of the past two days, though nothing as dramatic as what Alberta is dealing with. Regional highs ease into the mid to high single digits for Sunday and Monday. Frost risk increases overnight as the colder air mass settles in, worth watching if you have crop still in the field.

Looking beyond…

Recovery starts fairly quickly for the Alberta side of this system. A ridge of high pressure is forecast to begin building back into the province on Thanksgiving Monday, bringing a return to sunshine and daytime highs climbing back into the mid-to-upper teens by Tuesday and Wednesday. That ridge then pushes east, bringing milder air back into Saskatchewan and Manitoba by midweek as well. A weak system tracking south of the Prairies could bring a few more showers or flurries late Monday into Tuesday, but amounts should be light. So this looks like a dramatic but short-lived swing. A real taste of winter over the holiday weekend, followed by a return to more typical mid-October conditions by the middle of next week.