Storm Station
Sign in

Calpine, California

Community in Sierra County, California

Air quality

The air at Calpine

Index 7, good, led by fine particles. Read at 9 PM from its reporting area, Portola (CA), 10 miles off.

7Good
  • Fine particles (PM2.5)7Good-

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 52, moderate.

Smoke, the next 44 hours

No smoke near the ground through Sat 5 PM.

FriSat

Precipitation

What has fallen at Calpine

None in the last 3 days, to Thu 8 PM. 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 Calpine, the next 44 hours

Visibility stays 10 miles or more through Sat 5 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Calpine, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 6.5 miles away.

measured now4 instruments

measured daily2 instruments

Portola 0.5 WNWCA-PM-16

In a volunteer observer's own ground/10.2 mi away/4,845 ft/143 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Truckee-Tahoe, drawn

The nearest airport reporting now, 28.6 mi from Calpine, California. From its report of Oct 15, 2026, 9:35 PM 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 Truckee-Tahoe, 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 TRKFIG. A THE SKY OVER TRUCKEE-TAHOESECTION, 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 MORE0510TITLETruckee-Tahoe, the skySTATION REPORT · ASOS TRKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-TRK-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

39.2 F with a dew point of 23.0 F, 52 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,700 ft up.

Chart of the air at Truckee-Tahoe: temperature 39.2 degrees Fahrenheit and dew point 23.0, 52 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TRKFIG. B THE AIR AT TRUCKEE-TAHOETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00010 F20 F30 F40 F50 FSATURATES 3,700 FT ABOVE THE STATION, AT 19.6 FTEMPERATURE 39.2 FDEW POINT 23.0 FSPREAD 16.2 FRELATIVE HUMIDITY 52 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 POINTTITLETruckee-Tahoe, the airSTATION REPORT · ASOS TRKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-TRK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Truckee-Tahoe, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TRKFIG. C THE WIND AT TRUCKEE-TAHOEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLETruckee-Tahoe, the windSTATION REPORT · ASOS TRKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-TRK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in California

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

Near Calpine

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

Near Calpine

River and lake gauges