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Greenhorn, California

Community in Plumas County, California

Air quality

The air at Greenhorn

Index 35, good, led by fine particles. Read at 4 AM from its reporting area, Quincy (CA), 11 miles off.

35Good
  • Fine particles (PM2.5)35Good10.5 mi

The days ahead

Yesterday measured 17, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 11 PM.

FriSat

Precipitation

What has fallen at Greenhorn

None in the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Greenhorn, the next 44 hours

Visibility stays 10 miles or more through Sat 11 PM.

FriSat

On the radar over Greenhorn, CaliforniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Greenhorn, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.8 miles away.

measured now4 instruments

measured daily2 instruments

QuincyQCYC1

At a cooperative observer's station/10.8 mi away/3,432 ft/1,067 ft below here

snowfall, snow depth, precip, high, low

Rank116of 4,465

Portola 1.1 NNWCA-PM-12

In a volunteer observer's own ground/15.5 mi away/4,956 ft/457 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Susanville, drawn

The nearest airport reporting now, 33.8 mi from Greenhorn, California. From its report of Oct 16, 2026, 3:55 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Susanville, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SVEFIG. A THE SKY OVER SUSANVILLESECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESusanville, the skySTATION REPORT · ASOS SVETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SVE-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

37.4 F with a dew point of 26.6 F, 65 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,400 ft up.

Chart of the air at Susanville: temperature 37.4 degrees Fahrenheit and dew point 26.6, 65 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SVEFIG. B THE AIR AT SUSANVILLETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00010 F20 F30 F40 F50 FSATURATES 2,400 FT ABOVE THE STATION, AT 24.3 FTEMPERATURE 37.4 FDEW POINT 26.6 FSPREAD 10.8 FRELATIVE HUMIDITY 65 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLESusanville, the airSTATION REPORT · ASOS SVETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SVE-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southwest (230 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Susanville, north up: blowing from 230 degrees, the southwest, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SVEFIG. C THE WIND AT SUSANVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 230°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESusanville, the windSTATION REPORT · ASOS SVETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SVE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Susanville, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in California

33 places, each with its own forecast and its own instruments.

Near Greenhorn

The nearest places, each with its own forecast and the instruments nearest it.

Near Greenhorn

River and lake gauges