In 60 seconds: Alaska took up to 20 inches of snow this weekend under National Weather Service winter storm warnings, with more snow falling Monday night — and the northern Plains get their first snow of the season Sunday night into Monday, led by the Black Hills of South Dakota.
- Alaska's biggest totals hit the Western Brooks Range: 10 to 20 inches in the higher terrain, with gusts to 55 mph.
- Two Alaska warnings are still in effect Monday night: up to 16 more inches for the Central Brooks Range and up to 12 for the Upper Koyukuk Valley, both through 10 p.m. Alaska time.
- The Dakotas' first snow of the season arrives Sunday night into Monday — several inches possible in the Black Hills, with accumulation also possible in eastern Wyoming, northwest Nebraska, and southwest North Dakota.
- Denver and much of the Colorado River basin should escape the heaviest precipitation, per AccuWeather's Oct. 25 forecast.
- The wider West isn't done either: snow is expected at the highest elevations of the northern Cascades, Sierra, and Rockies through Saturday, Oct. 31.
Here's the thing: it's still October, and winter just showed up anyway. While most of the country is enjoying a mild fall Monday, the National Weather Service has Alaska under winter storm warnings and the northern Plains are getting their first snow of the season — the kind of weekend-to-Monday one-two punch that makes "winter storm forecast" one of the most searched phrases in America today.
Blowing snow in a ground blizzard. Photo: Arthur T. LaBar / Wikimedia Commons (CC BY)
What happened
A powerful early-season storm slammed northern Alaska over the weekend, and the warnings haven't all expired yet. The National Weather Service's Fairbanks office issued multiple winter storm warnings for the Brooks Range and surrounding valleys, with the heaviest snow falling on the higher terrain — and a second round of snow is forecast for Monday across both Alaska and the northern Plains.
In Alaska, the weekend's headline numbers came from the south slopes of the Western Brooks Range and the Noatak Valley: 10 to 20 inches of snow in the higher terrain, including around Red Dog Mine, with 3 to 6 inches in Noatak itself and wind gusts as high as 55 mph. That warning ran through Sunday afternoon Alaska time, but the travel headaches it created are carrying straight into the work week.
Latest verified facts
Two Alaska warnings are still live Monday night. The Central Brooks Range's south slopes — including Iniakuk Lake, Wiseman, Chandalar DOT Camp, Coldfoot, and the Dalton Highway from milepost 165 to 232 — are under a warning calling for up to 16 inches of snow and 35 mph winds, running through 10 p.m. Alaska Daylight Time Monday (2 a.m. Eastern Tuesday). The snow comes in two waves: lighter snow Sunday afternoon through Sunday night, then a heavier round Monday morning into the evening adding another 4 to 8 inches.
The Upper Koyukuk Valley is under its own warning through the same Monday-night deadline. Allakaket, Alatna, Evansville, and Bettles are forecast for up to 12 inches of snow with gusts to 30 mph. The Weather Service's advice for both zones is blunt: travel will be difficult, and anyone who must drive should carry a flashlight, food, and water.
The Lower 48's first snow is a separate system — and it's arriving now. According to AccuWeather's Oct. 25 forecast, colder air is pushing snow beyond the highest mountain elevations into the northern Plains. The Black Hills of South Dakota are the likeliest spot for accumulating snow, with Rapid City in line for its first slushy conditions of the season. Accumulation is also possible from eastern Wyoming and northwestern Nebraska into southwestern North Dakota.
Not everyone gets hit. Denver and much of the Colorado River basin should escape the storm's heaviest precipitation, per the same AccuWeather forecast. And the snow in the 11-state western outlook for the week of Oct. 26–31 is concentrated at the highest elevations of the northern Cascades, Sierra Nevada, and Rockies — mountain communities will see it, valley floors mostly won't.
| Area | Snow | Wind | Warning status |
|---|---|---|---|
| Western Brooks Range / Noatak Valley, Alaska | 10–20 in (high terrain); 3–6 in (Noatak) | Gusts to 55 mph | Weekend warning, expired Sun 4 p.m. AKDT |
| Central Brooks Range south slopes, Alaska | Up to 16 in, plus 4–8 in Monday | 35 mph | Through Mon 10 p.m. AKDT |
| Upper Koyukuk Valley, Alaska | Up to 12 in | Gusts to 30 mph | Through Mon 10 p.m. AKDT |
| Black Hills, South Dakota / eastern Wyoming / NW Nebraska / SW North Dakota | Several in (Black Hills); first snow of season | — | Sun night into Mon night |
Why it matters
October snow in the Brooks Range is not unusual — but a 20-inch weekend with 55 mph gusts is a serious storm by any month's standard, and it lands on the Dalton Highway corridor, the lifeline road for Alaska's North Slope, where whiteouts and drifting snow leave few bailout options.
The Plains side matters for a different reason: first snow is when the accidents happen — drivers out of practice, summer tires still on, slushy roads that look harmless. Rapid City's first slushy night is exactly the night to slow down, and the same goes for the Black Hills, eastern Wyoming, and the Nebraska panhandle Monday night.
Impact on the USA and the world
For most Americans, this storm is a spectator event — a reminder that winter is loading while the East enjoys a mild week. But for the northern tier, it's the season's opening act: the first snow of the year, the first winter storm warnings, and the first test of whether cars, homes, and highways are ready for what's coming.
It's also a reality check on the calendar: astronomical winter doesn't start until Dec. 21, but the atmosphere doesn't wait for the solstice. If you live in the mountains from the Cascades to the Rockies, this week's forecast is your cue to check the tires and the pantry.
What happens next
Our take: watch Monday night's Alaska deadline first — the Central Brooks Range and Upper Koyukuk warnings expire at 10 p.m. Alaska time, and the Weather Service will either let them lapse or extend them if the second wave overperforms. Then watch the Plains: if the Black Hills pick up the forecast several inches, the season's first snow photos will flood social media by Tuesday morning, and the conversation shifts from "first snow" to "first commute chaos."
One honest caveat: the totals above are forecasts, not measurements — confirmed snowfall numbers come from the Weather Service's storm reports over the next day or two, and we'll update this story if they diverge sharply.
Read more on Senate Wire: You Get an Extra Hour Sunday: Clocks Fall Back Nov. 1; and NWS Finally Rates the Overgaard Tornado: EF1, 110 mph, 9.25 Miles.
Sources: National Weather Service Fairbanks winter storm warnings (via Men's Journal Oct. 24–25, Autoblog, and ORBIS Weather); AccuWeather Oct. 25 forecast (via Men's Journal); weather.com Alaska alerts.