Alta Sierra Airport (09CL) Area Aviation Weather & Runway Winds
As of 8:55 AM PDT, Oct 28, based on the nearest station (KGOO), 09CL is currently VFR with calm winds, visibility 10+ statute miles, and no ceiling reported.
Aviation weather near Alta Sierra Airport in Grass Valley, CA, decoded from the nearest reporting station (KGOO): conditions and runway crosswinds.
Alta Sierra Airport (09CL) is a general aviation airport serving pilots in and around Grass Valley, CA at a field elevation of 2,279 ft. 09CL has no weather station of its own. Conditions here are decoded from KGOO, about 7 nm away, the nearest reporting station, and local conditions can differ. It has one runway (01/19), the longest 2,834 ft. CTAF is 122.9.
No weather station at this airport: showing the nearest station KGOO, 7.1 nm away.
Wind calm, visibility 10+ statute miles, no cloud data, temperature 10°C (50°F), altimeter 30.03 inHg. Conditions are Visual Flight Rules (VFR).
METAR KGOO 281555Z AUTO 00000KT 10SM CLR 10/04 A3003 RMK A01
What changed at KGOO (nearest station)?
Since the 1535Z (8:35 AM PDT) report, compared automatically against the latest METAR.
No significant changes since the 1535Z (8:35 AM PDT) report, conditions are holding steady.
Current pilot readout for 09CL
Based on the nearest station (KGOO), 09CL is currently VFR with calm winds, visibility 10+ statute miles, and no ceiling reported. Density altitude is approximately 2,100 ft (field elevation 2,279 ft). 09CL does not publish a TAF. The nearest TAF station is KBAB, about 18 nm away.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Runway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Current wind is calm: calm wind is not a factor for runway selection, and with no wind there is no head/tail or crosswind component to compute. Live numbers return automatically once a report includes a wind direction.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 01 | 2,834 ft | ASPH-F | - | - |
| 19 | 2,834 ft | ASPH-F | - | - |
Open the crosswind calculator to try your own wind and runway numbers →
09CL runways
1 physical runway · 2 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.
- Status not monitoredRunway 01/192,834 × 50 ft · ASPH-FCurrent useno stated-runway source at 09CLWind
- 01
- no steady wind
- 19
- no steady wind
no active equipment NOTAM receivedView Runway Intelligence →
“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 0→0 kt, ceiling unlimited → unlimited.
09CL weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.
Recent aviation weather trends at 09CL
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KGOO reported a mix of conditions, most often marginal VFR across 70 observations, with 2 flight-category changes. The strongest gust reached 11 kt, the lowest ceiling was 2,100 ft. Wind most often came from the E.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 01
- 56%
- 19
- 44%
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Live crosswind meter
09CL has no weather feed online, so the wind comes from KGOO, 7.1 nm away.
Wind is calm or variable. Either end works.
Have a weather station at 09CL? Help us make your field's weather available to every pilot, free. Add your field's wx station →Asphalt · 2,834 ft. Headings from FAA runway data. Not for navigation.
Field aerial
North up
Runway 01/19 drawn from FAA threshold coordinates.
Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit
Nearby TFRs
Active FAA TFRs near 09CL
FAA TFR data shows an active temporary flight restriction near 09CL.
View all active US TFRs → · Official FAA TFR ↗
Verify with official FAA TFR sources before flight.
Airport info
From the FAA airport record (cycle 2026-10-01) and OurAirports.
Services
- Attended
- Unattended
- Transient parking
- Tie-downs
- Landing fee
- No
- Pattern altitude
- 3,079 ft MSL (800 AGL)
- Control tower
- None
- Wind indicator
- Unlighted
Airport
- Type
- General aviation airport
- FAA LID
- 09CL
- City
- Grass Valley
- State
- California
- Country
- United States
- Elevation
- 2,279 ft
- Coordinates
- 39.1138, -121.0570
- Runways
- 1 physical runway · 2 runway ends
- Longest runway
- 2,834 ft
- Weather reporting
- Nearest station KGOO
- TAF
- Nearest KBAB
- CTAF
- 122.9 MHz
- Time zone
- America/Los_Angeles
- Sunset in
- 8h 53m
Run a flight school, FBO, or club here? Embed 09CL's live status on your website, free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
8 airports+2 more within 25 NM
25–50 NM
8 airports+2 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport: live wind, crosswind & flyability on each page.
- SFRCF - Sierra Foothills RC Flyers - Magnolia Intermediate School , Grass Valley, CA · 4 mi
- Sierra Flyers Model Airplane Club 1 , Marysville, CA · 24 mi
- Red Barons RC Flying Club 1 , Wheatland, CA · 24 mi
Customize your 09CL shirt or mug
09CL's real runway layout on the back, elevation and tower frequency on the front. Add your tail number on the sleeve.
Pilot PIREPs for Alta Sierra Airport (09CL)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Alta Sierra Airport, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for 09CL yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only, not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
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