Storm Station
Sign in

North Plains, Oregon

City in Washington County, Oregon

Air quality

The air at North Plains

Index 42, good, led by fine particles. Read at 11 AM from its reporting area, Hillsboro (OR), 5 miles off.

42Good
  • Fine particles (PM2.5)42Good5.1 mi
  • Ozone-13 ppb16 mi
  • Nitrogen dioxide6Good6 ppb18.6 mi
  • Sulfur dioxide0Good0 ppb20.5 mi
  • Carbon monoxide-0.3 ppm18.6 mi

The days ahead

Yesterday measured 26, good.

Smoke, the next 43 hours

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

FriSatSun

Precipitation

What has fallen at North Plains

None in the last 3 days, to Fri 10 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 North Plains, the next 43 hours

Visibility stays 8 miles or more through Sun 5 AM, lowest 9 miles Sat 5 AM.

FriSatSun

On the radar over North Plains, OregonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest North Plains, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.0 miles away.

measured now4 instruments

measured daily2 instruments

North Plains 3.3 NNEOR-WS-166

In a volunteer observer's own ground/3.3 mi away/366 ft/176 ft above here

precip, snowfall, snow depth

Rank-

Forest GroveFOGO3

At a cooperative observer's station/7.1 mi away/174 ft/16 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Portland/Hillsboro, drawn

The nearest airport reporting now, 4.5 mi from North Plains, Oregon. From its report of Oct 16, 2026, 10:53 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 Portland/Hillsboro, 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 HIOFIG. A THE SKY OVER PORTLAND/HILLSBOROSECTION, 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 MORE0510TITLEPortland/Hillsboro, the skySTATION REPORT · ASOS HIOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-HIO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

66.0 F with a dew point of 42.0 F, 42 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 5,500 ft up.

Chart of the air at Portland/Hillsboro: temperature 66.0 degrees Fahrenheit and dew point 42.0, 42 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 5,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HIOFIG. B THE AIR AT PORTLAND/HILLSBOROTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00030 F40 F50 F60 F70 F80 FSATURATES 5,500 FT ABOVE THE STATION, AT 36.8 FTEMPERATURE 66.0 FDEW POINT 42.0 FSPREAD 24.0 FRELATIVE HUMIDITY 42 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 POINTTITLEPortland/Hillsboro, the airSTATION REPORT · ASOS HIOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-HIO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (270 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Portland/Hillsboro, north up: blowing from 270 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 HIOFIG. C THE WIND AT PORTLAND/HILLSBOROPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 270°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPortland/Hillsboro, the windSTATION REPORT · ASOS HIOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-HIO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Oregon

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

Near North Plains

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

Near North Plains

River and lake gauges