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Etna, California

City in Siskiyou County, California

Air quality

The air at Etna

Index 49, good, led by fine particles. Read at 2 AM from its reporting area, Yreka (CA), 23 miles off.

49Good
  • Fine particles (PM2.5)49Good-
  • Ozone17Good-

The days ahead

Yesterday measured 26, good.

Smoke, the next 46 hours

Little smoke near the ground through Sat 11 PM: the index from smoke stays at 33 or under.

FriSat

Precipitation

What has fallen at Etna

None in the last 3 days, to Fri 1 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 Etna, the next 46 hours

Visibility stays 10 miles or more through Sat 11 PM.

FriSat

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

What is measuring near here

The 5 instruments nearest Etna, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now3 instruments

Quartz HillQTZC1

At a river or reservoir gauge/10.0 mi away/3,963 ft/1,036 ft above here

temp, wind, gust, humidity, pressure

Rank734of 4,465

measured daily2 instruments

EtnaETNC1

At a cooperative observer's station/0.2 mi away/2,963 ft/36 ft above here

snowfall, snow depth, precip, high, low

Rank-

Etna 3.7 NNWCA-SK-31

In a volunteer observer's own ground/3.8 mi away/2,868 ft/59 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Montague/Siskiyou, drawn

The nearest airport reporting now, 31.0 mi from Etna, California. From its report of Oct 16, 2026, 1:53 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 Montague/Siskiyou, 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 SIYFIG. A THE SKY OVER MONTAGUE/SISKIYOUSECTION, 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 MORE0510TITLEMontague/Siskiyou, the skySTATION REPORT · ASOS SIYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SIY-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

40.0 F with a dew point of 24.0 F, 52 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,600 ft up.

Chart of the air at Montague/Siskiyou: temperature 40.0 degrees Fahrenheit and dew point 24.0, 52 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SIYFIG. B THE AIR AT MONTAGUE/SISKIYOUTHE 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 3,600 FT ABOVE THE STATION, AT 20.7 FTEMPERATURE 40.0 FDEW POINT 24.0 FSPREAD 16.0 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 POINTTITLEMontague/Siskiyou, the airSTATION REPORT · ASOS SIYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SIY-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Montague/Siskiyou, 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 SIYFIG. C THE WIND AT MONTAGUE/SISKIYOUPLAN, 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 FORCE73TITLEMontague/Siskiyou, the windSTATION REPORT · ASOS SIYTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SIY-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Montague/Siskiyou, 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 Etna

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

Near Etna

River and lake gauges