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Snoqualmie Pass, Washington

Community in Kittitas County, Washington

Air quality

The air at Snoqualmie Pass

Index 17, good, led by fine particles. Read at 9 PM from its reporting area, Cascades of East King County (WA), 30 miles off.

17Good
  • Fine particles (PM2.5)17Good18.1 mi

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 15, good.

Smoke, the next 45 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 22 or under.

FriSat

Precipitation

What has fallen at Snoqualmie Pass

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 Snoqualmie Pass, the next 45 hours

Visibility stays 3 miles or more through Sat 5 PM, lowest 3 miles Sat 7 AM.

FriSat

On the radar over Snoqualmie Pass, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Snoqualmie Pass, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now4 instruments

measured daily2 instruments

HyakHYAW1

At a cooperative observer's station/1.0 mi away/2,568 ft/336 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Stampede Pass, drawn

The nearest airport reporting now, 8.9 mi from Snoqualmie Pass, Washington. From its report of Oct 15, 2026, 8:56 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 Stampede Pass, 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 SMPFIG. A THE SKY OVER STAMPEDE PASSSECTION, 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 MORE0510TITLEStampede Pass, the skySTATION REPORT · ASOS SMPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SMP-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

46.0 F with a dew point of 38.0 F, 73 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up.

Chart of the air at Stampede Pass: temperature 46.0 degrees Fahrenheit and dew point 38.0, 73 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SMPFIG. B THE AIR AT STAMPEDE PASSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,800 FT ABOVE THE STATION, AT 36.2 FTEMPERATURE 46.0 FDEW POINT 38.0 FSPREAD 8.0 FRELATIVE HUMIDITY 73 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 POINTTITLEStampede Pass, the airSTATION REPORT · ASOS SMPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SMP-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Stampede Pass, 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 SMPFIG. C THE WIND AT STAMPEDE PASSPLAN, 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 FORCE73TITLEStampede Pass, the windSTATION REPORT · ASOS SMPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SMP-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Hyak (HYAW1), 1.0 miles from here, read 8 Oct, 06:00. measured daily

Elsewhere in Washington

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

Near Snoqualmie Pass

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

Near Snoqualmie Pass

River and lake gauges