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St. Helens, Oregon

City in Columbia County, Oregon

Air quality

The air at St. Helens

Index 29, good, led by fine particles. Read at 1 AM from its reporting area, Sauvie Island (OR), 11 miles off.

29Good
  • Fine particles (PM2.5)29Good6.7 mi
  • Ozone19Good21 ppb6.7 mi

The days ahead

Yesterday measured 23, good.

Smoke, the next 40 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.

FriSat

Precipitation

What has fallen at St. Helens

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 St. Helens, the next 40 hours

Visibility stays 7 miles or more through Sat 5 PM, lowest 8 miles Sat 8 AM.

FriSat

On the radar over St. Helens, OregonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. Helens, 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 now4 instruments

measured daily2 instruments

St. Helens 0.7 WOR-CB-3

In a volunteer observer's own ground/0.2 mi away/128 ft/16 ft above here

precip, snowfall, snow depth

Rank-

Vernonia No 2VRNO3

At a cooperative observer's station/17.6 mi away/622 ft/510 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Scappoose Industrial Apk (1S4), drawn

The nearest airport reporting now, 6.4 mi from St. Helens, Oregon. From its report of Oct 16, 2026, 12:53 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 Scappoose Industrial Apk (1S4), 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 SPBFIG. A THE SKY OVER SCAPPOOSE INDUSTRIAL APK (1S4)SECTION, 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 MORE0510TITLEScappoose Industrial Apk (1S4), the skySTATION REPORT · ASOS SPBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SPB-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

52.0 F with a dew point of 41.0 F, 66 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up.

Chart of the air at Scappoose Industrial Apk (1S4): temperature 52.0 degrees Fahrenheit and dew point 41.0, 66 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPBFIG. B THE AIR AT SCAPPOOSE INDUSTRIAL APK (1S4)THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 2,500 FT ABOVE THE STATION, AT 38.5 FTEMPERATURE 52.0 FDEW POINT 41.0 FSPREAD 11.0 FRELATIVE HUMIDITY 66 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 POINTTITLEScappoose Industrial Apk (1S4), the airSTATION REPORT · ASOS SPBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SPB-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Scappoose Industrial Apk (1S4), north up: blowing from 280 degrees, the west, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPBFIG. C THE WIND AT SCAPPOOSE INDUSTRIAL APK (1S4)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEScappoose Industrial Apk (1S4), the windSTATION REPORT · ASOS SPBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SPB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Scappoose Industrial Apk (1S4), in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Oregon

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

Near St. Helens

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

Near St. Helens

River and lake gauges