09CL Alta Sierra
Runway 1 — favored by the wind (10 kt at 90° true)
Based on wind only — no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. ADS-B tracking just started here — traffic history is still building.
certainty: 90% evidence: WEAK no tower now
Wind 090° true at 10 kt · VFR · 53 min old · from KAUN (9.5 nm away)
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Why — evidence behind this answer
Runway 1
- WIND 4 kt headwind, 9 kt right crosswind 53 min ago +0.51
Runway 19
- WIND 4 kt TAILWIND, 9 kt left crosswind 53 min ago -2.90
Sources consulted
| source | status | age | note |
|---|---|---|---|
| D_ATIS | UNAVAILABLE | No D-ATIS at this field | |
| METAR | OK | 53 min | Nearest station KAUN (9.5 nm away) |
| ADSB | WARMING_UP | 4066 min | Only 0 min of track history so far |
| NOTAM | OK | ||
| CIFP | NOT_CONFIGURED | Instrument procedures: phase 4 |
Recent operations
No operations observed in the last hour. (Only 0 min of track history so far)
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09CL field & runways
Alta Sierra, Grass Valley, California. Field elevation 2280 ft. Non-towered (NON-ATCT). Private use. Magnetic variation 16.0°E on record, 12.9°E today.
The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.093°/year west — about 1° every 11 years — which is why runway numbers eventually stop matching their pavement.
| Runway | True | Magnetic | Number | Length | Surface | Pattern | Notes |
|---|---|---|---|---|---|---|---|
| 1 | 26.2° | 13.3° | matches rule gives runway 2 in ~18 yr | 2,834 ft | ASPH | left | |
| 19 | 206.2° | 193.3° | matches rule gives runway 20 in ~18 yr | 2,834 ft | ASPH | left |
Generated 11:47:58Z · auto-refreshes · JSON