Snow-Sure Areas in Switzerland: The Complete Expert Guide

Alpine Elevation Benchmarks: Which Altitude Thresholds Define Reliable Snow Coverage in Swiss Resorts

Altitude is the single most decisive factor when evaluating snow reliability in Swiss ski resorts — more predictive than any seasonal forecast or resort marketing claim. Decades of operational data from Swiss resorts consistently point to one critical threshold: base elevations above 1,500 metres statistically deliver natural snow coverage for at least 100 days per season, while resorts with valley stations below 1,200 metres increasingly struggle to open before late December, even in strong winters. Understanding these elevation brackets separates informed resort selection from expensive guesswork.

The 1,500 Metre Rule and Its Exceptions

The 1,500-metre baseline has long served as the industry benchmark for snow-sure classification in Switzerland, but the picture becomes significantly more nuanced when you separate base altitude from upper skiing terrain. A resort like Saas-Fee, with a base at 1,800 metres and glacier skiing reaching 3,600 metres, operates in an entirely different risk category than Wengen, whose base sits at 1,274 metres despite its top station exceeding 2,800 metres. The practical skiing experience at the bottom — where snow coverage determines whether you can actually ski back to the village — is what determines a resort's true reliability. How altitude shapes snow conditions across the full vertical drop is far more complex than any single elevation figure suggests, and experienced skiers learn to evaluate the entire terrain profile rather than headline summit numbers.

Swiss meteorological data from MeteoSwiss shows that every additional 100 metres of elevation above 1,500 metres correlates with roughly 15–20 additional days of natural snow cover per season, averaged across the past 30 years. At 2,000 metres, resorts like Verbier's Les Ruinettes or Zermatt's Sunnegga reliably see over 130 snow days annually. By contrast, stations clustered around 1,200–1,400 metres — including lower Graubünden villages popular with families — have seen their average season shorten by 3–4 weeks since the early 1990s.

Aspect, Terrain, and the Shadow of Climate Variability

Elevation alone does not tell the complete story. North-facing aspects at 1,800 metres frequently outperform south-facing slopes at 2,200 metres in terms of snow retention through March and April. Resorts oriented toward northern or northeastern exposures — Engelberg and Andermatt being prime examples — maintain base-level snow coverage significantly longer into spring than their altitude figures alone would predict. Andermatt's central position in the Uri Alps also benefits from exceptional annual snowfall totals averaging 500–600 centimetres, driven by its exposure to both Atlantic and Mediterranean weather systems.

When assessing resort reliability, consult actual long-term snowfall records rather than marketing highlights — a single exceptional season inflates perceived reliability far beyond what 20-year averages would justify. The practical benchmarks worth using when comparing Swiss resorts:

• Below 1,200 m base: High risk; season length increasingly unpredictable, snowmaking essential
• 1,200–1,500 m base: Moderate reliability; expect 80–100 snow days in average winters
• 1,500–1,800 m base: Good reliability; typically 100–130 snow days, robust season from December to April
• Above 1,800 m base: Excellent reliability; glacier resorts like Saas-Fee and Zermatt operate year-round

Booking decisions made on summit altitude rather than base elevation remain one of the most common and costly mistakes among intermediate-level planners. The mountain's top may be spectacular, but it's the bottom 300 vertical metres that define the actual guest experience on all but the snowiest of winters.

Regional Snow Reliability Rankings: Comparing the Valais, Graubünden, and Bernese Oberland

Switzerland's three dominant ski regions each operate under distinct meteorological regimes, and understanding these differences is the difference between booking a powder week and arriving to rain-soaked slush. While all three deliver world-class skiing, their snow profiles diverge significantly — in timing, depth, frequency, and long-term consistency. Anyone planning a ski property investment or a multi-week winter stay should treat these distinctions as fundamental criteria, not minor footnotes.

Valais: The Driest, Highest, and Most Reliable

The Valais consistently tops snow reliability rankings for one primary reason: it sits in a rain shadow that blocks Atlantic moisture while still intercepting high-altitude Mediterranean and northerly systems. Resorts like Zermatt (3,883m summit), Saas-Fee, and Verbier benefit from an average of 300+ sunny days in Zermatt alone, combined with high-altitude snowpack that persists well into May. Saas-Fee's glacier terrain above 3,500m has historically supported year-round skiing, though recent seasons have compressed this window slightly. The Valais inner valley receives only 500–600mm of annual precipitation at valley level, but snowfall above 2,500m is reliably distributed across November through April. If you want to understand why this region structurally outperforms others, the atmospheric mechanics behind these precipitation patterns explain how orographic lifting and cold-air pooling work in the Valais's favor.

Graubünden: Continental Consistency with Variable Timing

Graubünden operates under a more continental climate than the Valais, meaning colder baseline temperatures but less total snowfall volume. St. Moritz averages roughly 322cm of snow per season, while Davos — at 1,560m base — records approximately 200cm. The critical advantage here is temperature: Graubünden's cold, dry air preserves snowpack exceptionally well between storm cycles, reducing the freeze-thaw damage that plagues lower-altitude western resorts. The region tends to receive its most significant snowfall in January and February, making early December bookings somewhat riskier compared to the Valais. Long-term snowfall data going back several decades shows Graubünden maintaining more stable inter-annual patterns than the Bernese Oberland, particularly at elevations above 1,800m.

Bernese Oberland: High Volume, Lower Predictability

The Bernese Oberland — anchored by Wengen, Grindelwald, and Verbier's western counterpart Gstaad — receives the highest total precipitation of the three regions, often exceeding 2,000mm annually at mid-elevations. This translates to exceptional powder days when conditions align, but also to more frequent rain events below 1,500m and faster melt cycles in March and April. Jungfraujoch at 3,454m maintains a permanent ice field, but the skiing terrain at Kleine Scheidegg sits considerably lower, making base conditions more weather-dependent. The region compensates with sheer snowfall volume: Wengen can accumulate 3–4 meters of snow in strong La Niña years. The relationship between altitude bands and snow retention is nowhere more visible than in the Bernese Oberland's steep vertical drops.

For practical decision-making: prioritize Valais for guaranteed early and late-season skiing, Graubünden for mid-winter cold-weather reliability, and the Bernese Oberland when maximum snowfall volume and dramatic terrain variety outweigh the risk of variable base conditions.

Comparison of Snow-Sure Resorts in Switzerland

Meteorological Drivers Behind Switzerland's Most Consistently Snowy Corridors

Switzerland's reputation as a winter sports destination isn't built on luck — it's the product of highly specific atmospheric mechanics that interact with the Alps' complex topography. Understanding why certain valleys and massifs receive dramatically more snowfall than others just a few kilometers away is fundamental to selecting the right resort for a snow-guaranteed trip. The difference between 200 cm and 600 cm of annual snowpack in neighboring valleys often comes down to three or four compounding meteorological factors.

Orographic Lift and the Windward Advantage

Orographic precipitation is the single most powerful driver of reliable snow in the Swiss Alps. When moisture-laden Atlantic air masses or Mediterranean cyclones encounter the alpine barrier, they are forced upward, cooling adiabatically at roughly 0.65°C per 100 meters of ascent. By the time air reaches 2,000 meters, it has typically shed the majority of its moisture content as snow. This is why the Bernese Oberland's southern flanks — particularly the area around Grindelwald and Wengen — consistently register snowfall totals 40–60% higher than the northern pre-alpine zones, even during otherwise marginal winters.

The Valais corridor operates under a fundamentally different but equally productive mechanism. The valley's orientation channels southerly Föhn precursor flows, which destabilize the atmosphere and trigger intense precipitation on the windward slopes of the Pennine Alps. Zermatt and Saas-Fee benefit from this repeatedly throughout the season, with December through February typically delivering 180–240 cm of new snow at resort level — figures that remain remarkably consistent year over year.

Temperature Inversion Zones and High-Altitude Reliability

Temperature inversions create a paradox that experienced alpine travelers learn to exploit. When cold, dense air pools in valley floors while warmer air sits above, resorts positioned between 1,800 and 2,500 meters often ski under blue skies with fresh powder while lower-lying villages are locked under fog and rain. Verbier, Arosa, and Davos are classically positioned to benefit from this phenomenon, regularly recording positive ski conditions on days when Zurich or Geneva experience above-freezing temperatures and precipitation falling as rain below 1,200 meters.

The decades of recorded snowfall data across Swiss stations confirm that resorts above 1,800 meters in the Central and Eastern Alps maintain snow cover for an average of 130–150 days per season — roughly 25–30 days more than comparable Western Alpine resorts at identical elevations. This differential traces directly back to continental air masses from the northeast, which deliver dry, cold conditions that preserve existing snowpack even when Atlantic systems temporarily moderate temperatures.

• Lake-effect enhancement: Lake Geneva and Lake Constance add measurable moisture to passing systems, boosting snowfall totals in the Chablais and Appenzell regions by an estimated 15–20%
• Aspect and solar radiation: North-facing slopes above 2,000 meters receive 30–40% less direct solar radiation in January, dramatically extending snow retention between storm cycles
• Altitude of the zero-degree isotherm: In La Niña-influenced winters, this isotherm regularly drops to 800–1,000 meters, converting marginal rain events at valley level into substantial snowfall across the entire resort range

Identifying these corridors before booking isn't guesswork — MeteoSwiss station data going back to 1931 clearly delineates which micro-regions show the lowest interannual variability in snowfall, making them the safest bets for a guaranteed white holiday regardless of broader climate trends.

Glacier-Based Ski Areas vs. High-Alpine Terrain: Snow Guarantee Strategies Compared

Switzerland's most reliable ski destinations fall into two fundamentally different categories, each with its own snow-guarantee logic. Glacier ski areas like Zermatt, Saas-Fee, and Engelberg's Titlis operate on permanent ice fields that sit above 2,900 meters, offering skiing 365 days a year regardless of seasonal snowfall patterns. High-alpine terrain resorts — think Verbier's Mont-Fort at 3,330m or Andermatt's Gemsstock at 2,963m — rely on consistent natural snowpack at extreme elevations without the permanent ice base underneath. Understanding the operational difference between these two models is critical when booking anything outside the December–March core season.

How Glacier Resorts Maintain Year-Round Skiability

Glacier areas don't depend on seasonal snowfall in the same way conventional resorts do. The ice mass itself — Zermatt's Klein Matterhorn glacier covers roughly 20 square kilometers — acts as a permanent snow reservoir. Even during Switzerland's driest recent winters, such as 2022/23 when valley snowfall ran 40–60% below long-term averages, Zermatt's glacier terrain above 3,500m maintained skiable conditions throughout. Saas-Fee takes this further by operating a summer ski circuit on the Feegletscher from July through October, with a groomed halfpipe and dedicated race training infrastructure. The tradeoff: glacier terrain typically offers limited vertical — often just 300–600m of groomed runs — and summer operations come with crevasse management restrictions that reduce accessible acreage significantly.

The snowmaking picture at glacier resorts is more nuanced than most skiers expect. Because temperatures at 3,000m+ rarely climb above 0°C during winter, artificial snowmaking is rarely needed on the glacier itself. However, the connector runs linking glacier terrain to lower village infrastructure — Zermatt's Trockener Steg link or Engelberg's glacier access run — sit in the 2,200–2,600m zone where snowmaking investment is substantial. Engelberg operates over 60 snow cannons specifically to secure this critical middle-mountain connection. When planning multi-day itineraries, understanding how elevation bands affect snow reliability across the mountain helps identify which runs carry meaningful closure risk even at glacier-adjacent resorts.

High-Alpine Terrain: Greater Vertical, Higher Variability

Resorts without glacier infrastructure compensate through sheer elevation and terrain diversity. Andermatt's partnership with Sedrun and Disentis — creating the SkiArena Andermatt-Sedrun — strings together high-alpine terrain across a 120km network where the top stations consistently hold natural snow from November through April. The Gemsstock's north-facing couloirs at 2,963m typically accumulate 4–6 meters of settled snowpack by February, outperforming many glacier areas in terms of off-piste quality. Verbier's Mont-Fort similarly delivers exceptional deep snow from January onward when regional precipitation patterns align — a dynamic explained in detail when examining why certain Swiss microclimates produce more consistent snowfall than their neighbors at comparable altitudes.

The practical recommendation for expert-level planning: glacier resorts for shoulder-season certainty (October/November and April/May), high-alpine terrain for peak-season quality. In January and February, a resort like Andermatt or Verbier will almost always offer superior off-piste conditions, greater vertical skiing, and a richer terrain mix than any glacier circuit. But book a mid-November week at Saas-Fee and you'll ski groomed glacier runs while lower-altitude competitors are still waiting for their first snowfall. Matching your travel window to the right snow-guarantee model is the single most effective strategy for avoiding disappointment in Swiss alpine skiing.

Decades of Snow Data: How Historical Records Identify Switzerland's Most Dependable Winter Destinations

Choosing a ski destination based on a single good season is one of the most common — and costly — mistakes winter sports enthusiasts make. The real measure of a resort's reliability lies in long-term meteorological archives, some of which in Switzerland stretch back over a century. MeteoSwiss, the national weather service, has been systematically recording snow depth, snowfall frequency, and snow cover duration at hundreds of measuring stations since the late 19th century. This accumulated data forms the empirical backbone of any serious assessment of snow security.

When analysts examine these records, clear patterns emerge. Resorts above 1,800 meters consistently show natural snow cover for 120 to 160 days per season, while those below 1,400 meters average just 60 to 80 reliable snow days — a difference that fundamentally shapes the skier's experience. Understanding how these long-term patterns reveal the true character of Switzerland's winter landscapes allows travelers to make evidence-based decisions rather than relying on marketing claims or recent memory.

What the Numbers Actually Reveal

The Swiss Federal Institute for Snow and Avalanche Research (WSL/SLF) in Davos publishes detailed seasonal snow reports going back to the 1930s for key Alpine stations. Their data consistently identifies a core group of high-performing destinations: Saas-Fee records an average of 6.8 meters of cumulative annual snowfall at resort level, Zermatt's Klein Matterhorn sector maintains above-freezing snowpack for fewer than 20 days per year on average, and Andermatt benefits from its north-facing valley position to accumulate snow depths that regularly exceed 200 cm mid-season. These aren't promotional figures — they are multi-decade averages that smooth out individual anomalous seasons.

Equally instructive is what the archives reveal about volatility. A resort averaging 90 snow days per season sounds reasonable until you examine the standard deviation — some years delivering 140 days, others barely 50. Low variance is as important as high averages when planning a family holiday or booking months in advance. Resorts like Verbier's upper sectors and Engelberg's Titlis zone consistently show low seasonal variance, making them statistically safer bets for fixed travel dates.

Reading Historical Data Alongside Elevation Profiles

Historical records gain additional analytical power when cross-referenced with terrain data. A station sitting at 2,000 meters on a south-facing slope can underperform compared to a 1,700-meter north-facing equivalent in certain years — something raw elevation figures would never reveal. This is why the relationship between altitude and snow reliability in Swiss ski areas is never a simple linear equation but rather a complex interaction of aspect, local topography, and prevailing wind patterns that historical records help untangle over time.

Practical recommendations for the informed traveler:

• Request seasonal snow reports directly from resort operators — reputable destinations publish multi-year averages, not just peak figures
• Cross-reference with SLF's publicly available SNOWPACK data for independent verification
• Prioritize destinations with documented median snow depth above 80 cm at mid-mountain during your target travel window
• Weight January and February records most heavily — December and March show significantly higher inter-annual variability across all Swiss regions

The historical record doesn't predict the future with certainty, but in a climate where poor snow seasons increasingly disrupt winter tourism, decades of consistent performance data remain the most honest indicator of where your odds of finding reliable snow are genuinely highest.

Climate Change Pressure on Snow-Sure Zones: Risk Assessment for Swiss Ski Regions Through 2050

The Swiss Federal Institute for Forest, Snow and Landscape Research (WSL) projects a temperature increase of 2.5°C to 4.5°C for the Alpine region by 2100 under high-emission scenarios. By 2050, Swiss ski resorts below 1,800 meters face a statistical probability of losing between 30% and 50% of their natural snow days annually. This isn't a distant theoretical concern — the 2022/23 season demonstrated exactly this vulnerability when resorts below 1,500 meters struggled to open before late January. Understanding how Swiss snowfall has evolved over the past century makes clear that current anomalies are increasingly becoming the baseline.

The 0°C isotherm — the critical threshold separating snow from rain — is migrating upward at approximately 150 meters per decade. For practical resort planning, this means resorts currently sitting comfortably within snow-reliable zones are recalculating their risk exposure in 10-year windows rather than 30-year cycles. Resorts like Andermatt-Sedrun and Saas-Fee, with core skiing predominantly above 2,500 meters, occupy a fundamentally different risk category than competitors in the Bernese Oberland's valley stations.

Elevation-Stratified Risk Categories Through 2050

Swiss ski resorts can be meaningfully divided into three climate risk tiers based on current elevation profiles and projected temperature trajectories. High-risk zones (primary skiing below 1,800m) include resorts like Les Diablerets' lower sectors and Grindelwald's valley-level infrastructure — these face viable season compression from the current 120-140 natural snow days to potentially 60-80 days by 2045. Medium-risk zones (1,800–2,400m primary skiing) represent the contested middle ground where snowmaking investment decisions made today will determine operational viability through 2050. Low-risk zones above 2,400m — Zermatt, Saas-Fee, Verbier's Attelas sector — retain structural advantages that altitude provides as a natural buffer against warming trends, though even these aren't immune to season-shortening at lower access points.

Glacier-connected ski areas present a specific calculation. Saas-Fee's Feegletscher and Zermatt's Theodul Glacier currently provide summer skiing, but WSL models suggest the Feegletscher could lose 60% of its skiable surface area by 2060 under moderate warming scenarios. Resorts banking on glacier terrain as a long-term asset face a dual exposure: direct surface loss and accelerating reputational risk as images of retreating ice replace powder photography in media coverage.

Adaptation Strategies That Actually Work

The resorts demonstrating meaningful climate resilience share three operational characteristics. First, they've invested in high-altitude snowmaking infrastructure with water reservoirs positioned above 2,200m — Verbier's 90,000 cubic meter reservoir at Attelas is the benchmark. Second, they've diversified revenue streams so that a poor December doesn't trigger existential financial pressure. Third — and most critically — they've pursued terrain consolidation rather than expansion, concentrating groomed surfaces in the highest, most reliable sectors. The geographic and atmospheric factors that drive superior snowfall in specific Swiss valleys remain largely stable even as temperatures rise, meaning topographic snow-trapping advantages in locations like the Uri Alps or Valais don't simply evaporate with warming — they become competitively more valuable.

• Snowmaking ROI threshold: Viable only above 1,600m; optimal above 2,000m where wet-bulb temperatures permit operation on 85+ nights annually
• Vertical drop concentration: Resorts with 60%+ of terrain above 2,200m show statistically significant resilience in WSL seasonal modeling
• Infrastructure repositioning: Several Valais resorts are actively relocating base facilities 200–400m higher on a 15-year timeline

Snowmaking Infrastructure and Natural Snow Synergies in Low-Risk Swiss Resorts

Switzerland's most reliable ski destinations don't succeed through natural snowfall alone — they've engineered a sophisticated backstop system that guarantees skiable conditions even when the atmosphere doesn't cooperate. The smartest resorts treat snowmaking not as a replacement for natural snow, but as a precision tool that extends seasons at both ends and fills gaps during low-precipitation windows. Understanding how these systems interact with terrain and elevation is essential for anyone evaluating a resort's true snow reliability.

Technical Capacity: What the Numbers Actually Mean

Zermatt currently operates over 90 snow cannons across its lower runs, capable of producing approximately 300,000 cubic meters of machine snow per season — enough to maintain 20–30 cm base depth across the primary access corridors even in drought years. Verbier has invested over CHF 40 million in snowmaking infrastructure since 2015, covering the critical Médran to Les Ruinettes connection that historically suffered from early and late-season gaps. These aren't vanity investments; they're calculated risk-management tools protecting CHF 200+ million in annual revenue.

The key technical variable is wet-bulb temperature, not simply air temperature. Effective snowmaking requires wet-bulb temperatures below -2°C, which means resorts above 1,800 meters can operate their systems reliably from late October through early April — roughly 160 operational nights per season at Saas-Fee and Andermatt. Resorts that rely on elevation to maintain consistent cold temperatures gain a structural advantage here: their snowmaking windows are simply wider, making artificial snow a genuinely reliable supplement rather than an emergency measure.

Where Machine Snow and Natural Conditions Reinforce Each Other

The highest-value snowmaking deployments target specific terrain chokepoints: valley-connecting runs, south-facing intermediate slopes, and lift access corridors below 1,800 meters. Resorts like Engelberg and Arosa strategically use snow cannons to protect north-facing powder stashes by concentrating skier traffic onto artificially reinforced runs, preserving natural snow quality on the most desirable terrain. This operational philosophy — directing traffic away from vulnerable snow — is a marker of mature resort management.

Andermatt's Gemsstock sector is a textbook example of synergy done right. The upper mountain receives exceptional snowfall driven by the specific meteorological dynamics of central Alpine corridors, while snowmaking infrastructure on the lower Nätschen sector ensures continuous ski-in/ski-out access regardless of natural conditions. The result is a season that reliably runs from late November through late April without requiring exceptional snowfall years.

Practical considerations for resort selection based on snowmaking quality:

• Coverage percentage: Look for resorts where snowmaking covers at least 60% of total piste length — Grindelwald-First (65%) and Laax (70%) are strong benchmarks
• Water reservoir capacity: Resorts with on-mountain reservoirs exceeding 100,000 m³ (Verbier, Davos) can operate continuously during cold snaps without supply interruptions
• Pump station elevation: Infrastructure positioned above 1,600 meters maximizes operational nights per season
• Energy sourcing: Hydroelectric-powered systems (standard across most Swiss resorts) run at lower cost, enabling longer and more intensive deployment

The bottom line for expert skiers evaluating risk: a resort with 70% snowmaking coverage above 1,800 meters and on-mountain water storage is statistically safer than a higher-elevation resort with minimal infrastructure investment, even accounting for natural snowfall differentials. The combination — not either factor alone — defines genuine snow reliability.

Microclimate Anomalies: Hidden Snow-Sure Pockets and Underrated Swiss Destinations Worth Targeting

Switzerland's topography creates dozens of microclimatic niches that even experienced winter travelers overlook. Valley orientation, surrounding rock faces, and localized wind patterns can shift snowfall totals by 40–60% within a horizontal distance of just 15 kilometers. Understanding these anomalies is what separates the skier who consistently finds powder from the one who arrives to icy groomers and disappointment.

The Physics Behind Microclimate Snow Traps

Orographic lift — the forced ascent of moist air masses against mountain barriers — is the fundamental engine behind Switzerland's most reliable snow pockets. When Atlantic depressions track through the Rhône corridor or the Rhine valley, specific ridgelines act as moisture interceptors, squeezing precipitation from clouds before they lose their load. The atmospheric dynamics that make certain Swiss regions so consistent are directly tied to these topographic funnels. The Avers valley in Graubünden is a textbook case: sitting at 1,700–2,000 meters with a north-facing bowl geometry, it accumulates snowpack 20–30% deeper than neighboring valleys at identical elevation.

Aspect matters enormously. North-facing slopes at 1,800 meters can retain base snow from November through early May, while south-facing terrain at 2,200 meters may see full melt-out by mid-March. The Conches Valley in Upper Valais exploits exactly this dynamic — its high sidewalls shade the valley floor for extended hours during winter, preserving snowpack that lower-lying Rhône valley stations simply cannot match.

Underrated Destinations Deserving Serious Attention

Three areas consistently punch above their marketing weight:

• Saas-Fee (3,600m glacier zone): While Zermatt attracts the headlines, Saas-Fee's compact ski area sits almost entirely above 2,500 meters. Its cirque geometry traps snowfall from multiple wind directions, and the Fee Glacier guarantees skiing from October through April without artificial snow dependency.
• Bettmeralp and Riederalp: Car-free villages in the Aletsch region with summit terrain reaching 2,869 meters. They receive consistent north-westerly snowfall events that bypass Verbier entirely, yet accommodation costs run 30–40% lower for comparable comfort.
• Arosa-Lenzerheide: The linked area's eastern exposure catches moisture-laden systems from Austria that Davos partially blocks. Average annual snowfall at Weisshorn (2,865m) exceeds 8 meters — numbers that rarely make international press despite being statistically more reliable than several Tier-1 resorts.

Reviewing decades of snowfall records across Swiss winter destinations reveals a counterintuitive pattern: several mid-tier resorts in Graubünden and eastern Valais show coefficient-of-variation scores well below those of famous resorts — meaning their season-to-season consistency is actually superior, even if peak accumulation numbers are less dramatic.

The practical takeaway is elevation-first targeting. Anywhere with skiable terrain consistently above 2,400 meters and a documented north or northeast valley orientation deserves serious evaluation. The relationship between altitude and snow reliability in Swiss ski areas follows a steep curve above 2,200 meters — roughly every 200-meter gain in summit elevation reduces snowfall variability by approximately 15%. Cross-reference this with valley morphology data from MeteoSwiss, and you'll identify pockets that deliver powder conditions in 8 out of 10 seasons, regardless of whether the broader Alpine winter trends warm or cold.