Ground blizzard¶
Blizzard conditions caused by strong winds lifting existing snow despite little or no falling precipitation.
Core Idea¶
A ground blizzard is a severe blowing-snow condition in which strong winds lift and transport loose snow already lying on the surface, producing very low visibility and drifting even when little or no new snow is falling. The defining source is the snowpack rather than precipitation aloft. It can begin after a storm has ended under a clear sky, which makes it especially hazardous to travelers who interpret the end of snowfall as the end of severe weather.
Scope of Application¶
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Weather forecasting and warnings. Snow condition, wind, temperature, fetch, terrain, and formal agency thresholds determine hazard onset.
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Road safety. Abrupt whiteout, drifting, burial, and spatial variation affect closures and traveler risk after precipitation has ended.
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Aviation operations. Surface visibility and runway drifting can deteriorate despite clear sky or no reported falling snow.
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Polar meteorology. Persistent wind and dry snow support large-scale blowing-snow transport in open environments.
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Snow-transport modeling. Saltation, suspension, lofting, cohesion, crusting, and reservoir depletion govern flux and visibility.
Clarity¶
Ground blizzard identifies severe visibility loss and drifting caused chiefly by wind lifting existing surface snow, even when little or no new snow falls. This source distinction prevents the end of precipitation from being mistaken for the end of hazard and separates the phenomenon from ordinary blowing snow under agency-specific warning thresholds.
Manages Complexity¶
Ground blizzard reduces a severe winter visibility hazard to wind stress acting on an erodible snowpack over sufficient fetch, with temperature, terrain, vegetation, visibility, and duration controlling severity. The forecaster tracks existing surface snow separately from new precipitation, so hazard can persist or begin under clear sky. Blowing-snow and agency-defined blizzard branches reflect threshold differences rather than different source mechanisms.
Abstract Reasoning¶
Hazard move. From strong near-surface wind, loose cold snow, long fetch, and low modeled visibility, infer ground-blizzard risk even without current snowfall. Persistence move. After precipitation ends, use snowpack erodibility and wind forecast to predict continuing or newly developing hazard. Mitigation move. From terrain and prevailing transport, place shelter or road controls where fetch and drifting can be reduced. Boundary move. Blowing snow becomes an official blizzard only under the relevant wind, visibility, and duration thresholds; report the physical condition and warning classification separately.
Knowledge Transfer¶
Within the home domain. Ground blizzards transfer across polar, prairie, mountain, and transportation meteorology when strong winds lift and transport existing loose snow, reducing visibility even with little or no falling snow. Wind, snow availability, temperature, fetch, visibility, drifting, and duration retain physical meanings. Beyond the home domain (B — shared abstract mechanism). Other particle-laden boundary flows share resuspension and transport from a surface, but the portable parent is wind-driven entrainment. Whiteout rhetoric in politics or information is analogy. Blowing snow alone is not necessarily a blizzard; regional thresholds and observed conditions govern classification.
Neighborhood in Abstraction Space¶
Ground blizzard sits in a sparse region of the domain-specific corpus (80th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.
Family — Unclustered & Miscellaneous (2551 abstractions)
Nearest neighbors
- Landslide-Dam Failure — 0.84
- Terrain Softening — 0.83
- Downburst — 0.82
- Deposition — 0.82
- Dry Line — 0.81
Computed from structural-signature embeddings · 2026-10-08