Front Range
Denver storms are decided by wind direction against the mountains, and the same system can bury one suburb while barely touching another. The estimate below is loaded with live Denver forecast data.
Live Denver forecast estimate
Enter a location to compare tomorrow's snow, ice, temperature, wind and morning timing.
Local conditions
Denver sits on the high plains at roughly a mile above sea level, immediately east of the Front Range. Its heaviest snow comes from upslope flow: a system pulling moist air in from the east and forcing it to rise against the mountains. Because the zone of strongest lift depends on the precise wind direction and the position of the low, snowfall varies enormously across the metro from a single storm. Altitude and dry air then produce the other half of Denver's winter character: strong sun can clear pavement remarkably fast once snow stops, while shaded and untreated surfaces refreeze hard overnight.
What actually drives a decision
A forecast that verifies for one part of the metro can be badly wrong twenty miles away, because the lift zone moves with the wind. Use the location nearest the school and expect meaningful revisions inside 24 hours during an upslope setup.
Front Range districts frequently include both flatland neighbourhoods and foothills communities well above them. Snow level and road conditions differ across that span, and a district may cancel transportation to higher areas while operating normally on the flats.
Sun and dry air mean a storm ending at 3 a.m. often produces a normal school day, while the same total arriving at 6 a.m. does not. Morning timing therefore carries unusual weight in Denver, and the hourly panel is the most useful part of the result.
Colorado's biggest snow events regularly occur in March and April, when the atmosphere holds more moisture. That snow brings down limbs and power lines and makes travel difficult before melting quickly. A late-season storm should not be discounted because of the date.
The forecast for the coordinates above is scored against six weighted factors: snow and ice, temperature, wind chill, morning timing, area and routes, and school level. Around Denver the rows that most often carry the number are snow and ice, morning timing. Every factor appears in the result with its own value, score bar and published weight, so a percentage is never presented without the reasoning behind it. The methodology page documents each threshold, and the accuracy and limitations page sets out what the model cannot observe.
This site does not publish closure thresholds for any school system, because those are operational judgements rather than published numbers. What it can do is point you at the organisations that actually decide. Around Denver, CO those include:
Treat the estimate on this page as a reason to prepare and to keep checking, never as an announcement. A school system can close buildings, delay the start, cancel transportation only, dismiss early or move to a different learning format, and those outcomes are not interchangeable.
Primary sources for weather warnings and road conditions covering Denver. School decisions still come from the systems listed above.
Denver questions
The estimate reads the forecast for the coordinates you selected. Denver Public Schools and the Front Range districts announce independently, and several distinguish a full closure from a delayed start or from cancelled transportation to foothills areas only. Read the whole message, not the headline.
Upslope snow depends on the exact wind direction and the position of the low pressure centre. Small shifts move the zone of strongest lift and change local totals substantially, which is why the morning check matters here.
It uses the coordinates you select, so the forecast reflects that point. It does not model an individual campus's elevation or the grade of its access roads, so treat foothills conditions as more severe than the plains number.
Not necessarily. Late-season Colorado storms can be the heaviest and wettest of the year, with power outages and difficult morning travel. The model scores forecast conditions, not the calendar date.
If the school sits in the foothills, enter that community instead. Snow level and accumulation change fast with elevation along the Front Range, and a downtown reading can understate what is happening a few hundred feet higher up.
Still deciding what to do with the number? Read how schools make the final call and the guide to the best times to check a forecast.