Alta Sierra Airport (09CL) Area Aviation Weather & Runway Winds
Aviation weather near Alta Sierra Airport in Grass Valley, CA, decoded from the nearest reporting station (KGOO): conditions, runway crosswinds, and free Telegram airport alerts.
Alta Sierra Airport (09CL) is a general aviation airport serving pilots in and around Grass Valley, CA at 2,275 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. Its 2 runways (01, 19), longest 2,834 ft, are checked against the current wind in the crosswind table below. CTAF is 122.9. Track it in the ATIS Alerts Telegram bot to get alerts read from KGOO, the station this page is based on.
No weather station at this airport: showing the nearest station KGOO, 7.1 nm away.
Wind from the south (190°) at 7 kt, gusting 13 kt, visibility 10+ statute miles, no cloud data, temperature 27°C (81°F), altimeter 29.97 inHg. Conditions are Visual Flight Rules (VFR).
METAR KGOO 122235Z AUTO 19007G13KT 150V240 10SM CLR 27/02 A2997 RMK A01
What changed at KGOO (nearest station)?
Since the 2215Z (3:15 PM PDT) report, compared automatically against the latest METAR.
No significant changes since the 2215Z report, conditions are holding steady.
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Current pilot readout for 09CL
Based on the nearest station (KGOO), 09CL is currently VFR with winds from 190° at 7 knots gusting 13, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway 01, about 2 knots. Density altitude is approximately 4,200 ft (field elevation 2,275 ft). 09CL does not publish a TAF. The nearest TAF station is KBAB, about 18 nm away.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
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Track 09CL free on TelegramRunway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Use this section to quickly compare current wind alignment across available runways at 09CL. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 19 | 2,834 ft | ASPH-F | 7 kt tail | 1 kt left (g2) |
| 01FAV | 2,834 ft | ASPH-F | 7 kt tail | 2 kt right (g4) |
Open the crosswind calculator to try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 24 h: wind 3→7 kt, ceiling unlimited → unlimited.
09CL weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Live weather radar around Alta Sierra Airport in Grass Valley, CA: the NOAA/NWS NEXRAD composite updates about every five minutes, with NOAA lightning strike density overlaid. The loop plays the past 50 minutes, then continues into a future-radar forecast (+1 to +4 hours, NOAA HRRR model) so you can see where precipitation around 09CL is headed.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
Forecast frames (amber label) are HRRR model guidance, not observed radar. Lightning strike density appears as a blue-white glow when strikes are detected in view. Radar and lightning coverage are limited in parts of Alaska, Hawaii, and offshore areas. Not for navigation.
Pilot reports (PIREPs) within 100 NM of 09CL
Reported by pilots in flight over the past 6 hours, via aviationweather.gov.
Show raw report
RNO UUA /OV KRNO347005/TM 2238/FL140/TP B738/TB OCNL MOD BLO 140/RM LLWS +10KT DURD RY17R RNO
RNO UUAHeader: reporting station and UUA: an URGENT pilot report (severe conditions, wind shear, or similar).OV KRNO347005Location: fix or navaid, optionally with a radial and distance in NM.TM 2238Reported at 22:38 UTC.FL140Altitude: 14,000 ft MSL.TP B738Aircraft type reporting.TB OCNL MOD BLO 140Turbulence: occasional moderate blo 140.RM LLWS +10KT DURD RY17R RNORemarks.Show raw report
RNO UUA /OV KRNO/TM 2145/FLUNKN/TP B739/TB LGT TURB/RM DURD. LLWS +/-10 KT 052-SFC DURD RY17R RNO
RNO UUAHeader: reporting station and UUA: an URGENT pilot report (severe conditions, wind shear, or similar).OV KRNOLocation: fix or navaid, optionally with a radial and distance in NM.TM 2145Reported at 21:45 UTC.FLUNKNAltitude unknown.TP B739Aircraft type reporting.TB LGT TURBTurbulence: light turb.RM DURD. LLWS +/-10 KT 052-S…Remarks.Show raw report
SUU UA /OV SAC180015 /TM 2129 /FL030 /TP C172 /SK SKC /TA 21 /TB NEG /IC NEG
SUU UAHeader: reporting station and UA: a routine pilot report.OV SAC180015Location: fix or navaid, optionally with a radial and distance in NM.TM 2129Reported at 21:29 UTC.FL030Altitude: 3,000 ft MSL.TP C172Aircraft type reporting.SK SKCSky condition: cloud bases and tops in hundreds of feet MSL.TA 21Outside air temperature, °C.TB NEGTurbulence: none reported.IC NEGIcing: none reported.Show raw report
LVK UA /OV 295010/TM 2127/FL024/TP P28A/TB MOD
LVK UAHeader: reporting station and UA: a routine pilot report.OV 295010Location: fix or navaid, optionally with a radial and distance in NM.TM 2127Reported at 21:27 UTC.FL024Altitude: 2,400 ft MSL.TP P28AAircraft type reporting.TB MODTurbulence: moderate.Show raw report
SUU UA /OV O88 /TM 2125 /FL030 /TP C172 /SK SKC /TA 21 /TB OCNL LGT-MOD BLO 015 /IC NEG /RM DURC O88
SUU UAHeader: reporting station and UA: a routine pilot report.OV O88Location: fix or navaid, optionally with a radial and distance in NM.TM 2125Reported at 21:25 UTC.FL030Altitude: 3,000 ft MSL.TP C172Aircraft type reporting.SK SKCSky condition: cloud bases and tops in hundreds of feet MSL.TA 21Outside air temperature, °C.TB OCNL LGT-MOD BLO 015Turbulence: occasional light to moderate blo 015.IC NEGIcing: none reported.RM DURC O88Remarks.Show raw report
RNO UUA /OV KNRO/TM 2050/FLUNKN/TP B38M/TB LGT TURB /RM DURD. LLWS +10 KT 049-SFC DURD RY17R RNO
RNO UUAHeader: reporting station and UUA: an URGENT pilot report (severe conditions, wind shear, or similar).OV KNROLocation: fix or navaid, optionally with a radial and distance in NM.TM 2050Reported at 20:50 UTC.FLUNKNAltitude unknown.TP B38MAircraft type reporting.TB LGT TURBTurbulence: light turb.RM DURD. LLWS +10 KT 049-SFC…Remarks.Show raw report
RNO UUA /OV KRNO347020/TM 2043/FL160/TP B38M/TB LGT- ONCL MOD TURB BLO 160/RM LLWS +10 KT 048-046 DURD RY17R RNO
RNO UUAHeader: reporting station and UUA: an URGENT pilot report (severe conditions, wind shear, or similar).OV KRNO347020Location: fix or navaid, optionally with a radial and distance in NM.TM 2043Reported at 20:43 UTC.FL160Altitude: 16,000 ft MSL.TP B38MAircraft type reporting.TB LGT- ONCL MOD TURB BLO 16…Turbulence: light - oncl moderate turb blo 160.RM LLWS +10 KT 048-046 DURD …Remarks.Show raw report
RNO UA /OV KRNO347012/TM 2037/FL160/TP B39M/TB MOD TURB BLO 160 /RM LLWS +10 KT 046-SFC DURD RY17R RNO
RNO UAHeader: reporting station and UA: a routine pilot report.OV KRNO347012Location: fix or navaid, optionally with a radial and distance in NM.TM 2037Reported at 20:37 UTC.FL160Altitude: 16,000 ft MSL.TP B39MAircraft type reporting.TB MOD TURB BLO 160Turbulence: moderate turb blo 160.RM LLWS +10 KT 046-SFC DURD …Remarks.⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.
Recent aviation weather trends at 09CL
From ATIS Alerts' hourly weather history.
Over the past 24 hours, the nearest station KGOO reported mostly VFR across 72 observations, with 0 flight-category changes. The strongest gust reached 13 kt, the lowest ceiling was 3,500 ft. Wind most often came from the SE.
- 01
- 72%
- 19
- 28%
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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 facts
Reference data from the OurAirports dataset.
- Type
- General aviation airport
- FAA LID
- 09CL
- City
- Grass Valley
- State
- California
- Country
- United States
- Elevation
- 2,275 ft
- Coordinates
- 39.1138, -121.0570
- Runways
- 2
- Longest runway
- 2,834 ft
- Weather reporting
- Nearest station KGOO
- TAF
- Nearest KBAB
- CTAF
- 122.9 MHz
- Time zone
- America/Los_Angeles
- Sunset in
- 3h 38m
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
09CL weather: frequently asked
What runways are available at 09CL?+
09CL has 2 runways: 01, 19; the longest is 2,834 ft. This page computes the live crosswind for each runway end from the current wind.
Where does the weather shown for 09CL come from?+
Alta Sierra Airport does not have its own weather station. Conditions shown here come from the nearest reporting station, KGOO, about 7 nm away, close enough for situational awareness, but local conditions at 09CL can differ.
Does 09CL have a TAF?+
No. 09CL does not publish its own TAF. The nearest TAF station is KBAB, about 18 nm away.
Does 09CL broadcast D-ATIS?+
No. 09CL does not broadcast D-ATIS. Alerts for 09CL from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR (via the nearest reporting station) instead.
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.
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