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Union Gap, Washington

City in Yakima County, Washington

Air quality

The air at Union Gap

Index 64, moderate, led by fine particles. Read at 4 AM from its reporting area, Yakima (WA), 3 miles off.

64Moderate
  • Fine particles (PM2.5)64Moderate-
  • Coarse particles (PM10)37Good-

The days ahead

Yesterday measured 58, moderate.

Smoke, the next 44 hours

Little smoke near the ground through Sun 11 PM: the index from smoke stays at 39 or under.

SatSun

Precipitation

What has fallen at Union Gap

None in the last 3 days, to Sat 3 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 Gap, the next 44 hours

Visibility stays 10 miles or more through Sun 11 PM.

SatSun

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

What is measuring near here

The 6 instruments nearest Union Gap, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now4 instruments

measured daily2 instruments

Yakima 2.2 SSEWA-YK-14

In a volunteer observer's own ground/1.2 mi away/1,021 ft/28 ft above here

precip, snowfall, snow depth

Rank-

Selah 2 NESELW1

At a cooperative observer's station/7.7 mi away/1,112 ft/119 ft above here

snowfall, snow depth, precip, high, low

Rank26of 1,444

Station report

The weather at Yakima Air Terminal, drawn

The nearest airport reporting now, 2.9 mi from Union Gap, Washington. From its report of Oct 17, 2026, 3:53 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 Yakima Air Terminal, 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 YKMFIG. A THE SKY OVER YAKIMA AIR TERMINALSECTION, 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 MORE0510TITLEYakima Air Terminal, the skySTATION REPORT · ASOS YKMTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-YKM-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

37.0 F with a dew point of 34.0 F, 89 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up.

Chart of the air at Yakima Air Terminal: temperature 37.0 degrees Fahrenheit and dew point 34.0, 89 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT YKMFIG. B THE AIR AT YAKIMA AIR TERMINALTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 700 FT ABOVE THE STATION, AT 33.3 FTEMPERATURE 37.0 FDEW POINT 34.0 FSPREAD 3.0 FRELATIVE HUMIDITY 89 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 POINTTITLEYakima Air Terminal, the airSTATION REPORT · ASOS YKMTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-YKM-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Yakima Air Terminal, north up: blowing from 280 degrees, the west, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT YKMFIG. C THE WIND AT YAKIMA AIR TERMINALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEYakima Air Terminal, the windSTATION REPORT · ASOS YKMTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-YKM-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Yakima Air Terminal, 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 Gap

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

Near Union Gap

River and lake gauges