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Union, Washington

Community in Mason County, Washington

Air quality

The air at Union

Index 52, moderate, led by fine particles. Read at 5 AM from its reporting area, Olympia-Lacey-Tumwater (WA), 25 miles off.

52Moderate
  • Fine particles (PM2.5)52Moderate-
  • Ozone0Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 33, good.

Smoke, the next 43 hours

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

FriSat

Precipitation

What has fallen at Union

None in the last 3 days, to Fri 4 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 Union, the next 43 hours

Visibility stays 7 miles or more through Sat 11 PM, lowest 8 miles Sat 3 AM.

FriSat

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

What is measuring near here

The 7 instruments nearest Union, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.3 miles away.

measured now5 instruments

measured daily2 instruments

Hoodsport 0.3 SWWA-MS-14

In a volunteer observer's own ground/4.5 mi away/133 ft/244 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Shelton/Sanderson, drawn

The nearest airport reporting now, 8.0 mi from Union, Washington. From its report of Oct 16, 2026, 5:20 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 200 ft; visibility 3 mi.

Section of the sky over Shelton/Sanderson, height above the station to scale: a few clouds cloud with its base at 200 feet, and visibility of 3 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SHNFIG. A THE SKY OVER SHELTON/SANDERSONSECTION, 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 SHEETFEW 200 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 3 MI0510TITLEShelton/Sanderson, the skySTATION REPORT · ASOS SHNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SHN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

40.0 F with a dew point of 39.0 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 200 ft.

Chart of the air at Shelton/Sanderson: temperature 40.0 degrees Fahrenheit and dew point 39.0, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SHNFIG. B THE AIR AT SHELTON/SANDERSONTHE 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 FSATURATES 200 FT ABOVE THE STATION, AT 38.7 FLOWEST CLOUD REPORTED, FEW 200 FTTEMPERATURE AND DEW POINT 40.0 F, 39.0 FRELATIVE HUMIDITY 96 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 POINTTITLEShelton/Sanderson, the airSTATION REPORT · ASOS SHNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SHN-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Shelton/Sanderson, 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 SHNFIG. C THE WIND AT SHELTON/SANDERSONPLAN, 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 FORCE73TITLEShelton/Sanderson, the windSTATION REPORT · ASOS SHNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SHN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Washington

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

Near Union

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

Near Union

River and lake gauges