Typical operating window
January–MarchWinter cover normally develops during December, with the more reliable operating window in midwinter.Verified planning context
Snow, weather and avalanche context
Historical patterns help you compare trips. They do not predict your week or replace the operator's daily decisions.
Strongest comparable snow evidence
318 mm SWE median · 250–355 mm interquartile rangeSouthern Carpathians reference ERA5-Land grid cellTier C · modelled estimate · low confidenceSnow character
continentalCold shaded snow can persist, but wind exposure, rain-on-snow, and thaw-freeze cycles vary by elevation.Public avalanche information
Romanian mountain weather and seasonal warningsConfirm whether a current local avalanche product exists for the exact terrain. Operator assessment remains primary.Weather and flight context
Continental systems interact with a long, complex range and variable exposure to Atlantic and Black Sea moisture.
- Low cloud in enclosed valleys
- Ridge wind
- Rapid thaw-freeze transitions
Meteorological reference area
Romanian Carpathian catalogue locations
- Includes
- Published Romanian Carpathian program areas.
- Excludes
- The full multinational Carpathian arc.
- Elevation
- No verified operator-terrain elevation band is public. Each evidence value retains its site elevation.
Evidence pack
Measurements, claims and gaps stay separate.
Tier CModelled snowfall water equivalent318 mm SWE median · 250–355 mm interquartile range
- Site
- Southern Carpathians reference ERA5-Land grid cell · 45.4000, 22.5000 · 5.1 km from Southern Carpathians reference reference point
- Period
- Calendar years 1991–2020
- Completeness
- 360 monthly means; all 30 calendar years contain 12 values.
- Method
- ERA5-Land monthly mean daily snowfall accumulation was multiplied by calendar days and 1,000, then summed by calendar year.
- Limitation
- This reference area supports evidence discovery and comparison. It is not an operating-area or tenure boundary. This unadjusted 0.1° reanalysis grid cell is not an observation, snow depth, or terrain-wide total. Grid elevation and wind redistribution can cause substantial local bias.
- ERA5-Land monthly averaged data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-26
Monthly evidence
Each cell keeps its measurement type and unit. Reanalysis water equivalent is not snow depth. Text-only cells preserve a representative data gap.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 59.7 mm SWE | 61.9 mm SWE | 45.6 mm SWE | 18.1 mm SWE | 0 mm SWE | 0 mm SWE | 0 mm SWE | 0 mm SWE | 0 mm SWE | 4.2 mm SWE | 31 mm SWE | 51.4 mm SWE |
Commercial operator assessment
Operator assessment process not independently verifiedThe operator must assess current snow, avalanche terrain, weather, aircraft limits, and rescue options. No private operational plan is inferred.
Sources and evidence notes
- WMO Climatological NormalsWorld Meteorological Organization · accessed 2026-08-25
- ERA5-Land hourly data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-25
- Mountain weather and warningsRomanian National Meteorological Administration · accessed 2026-08-25
- Published operator and trip inventoryHeliski International editorial team · accessed 2026-08-25
- ERA5-Land monthly averaged data from 1950 to presentCopernicus Climate Change Service · accessed 2026-08-26