Storm Station
Sign in

Union, South Carolina

City in Union County, South Carolina

Air quality

The air at Union

Index 66, moderate, led by fine particles. Read at 5 AM from its reporting area, Greenville-Spartanburg (SC), 33 miles off.

66Moderate
  • Fine particles (PM2.5)66Moderate23.7 mi
  • Ozone19Good-
  • Coarse particles (PM10)21Good-

The days ahead

Yesterday measured 62, moderate.

Smoke, the next 46 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 28 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 46 hours

Visibility stays 4 miles or more through Sun 2 AM, lowest 5 miles Sat 8 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Union, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now4 instruments

Union35A

At an airfield/2.3 mi away/595 ft/16 ft below here

temp, wind, gust, visibility, precip, pressure

Rank229of 1,128

I-385 @ US-221SC010

Beside a road/24.5 mi away/715 ft/104 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Union 1.3 ESC-UN-8

In a volunteer observer's own ground/1.4 mi away/619 ft/8 ft above here

precip, snowfall, snow depth

Rank-

Union 8 SUNNS1

At a cooperative observer's station/8.0 mi away/492 ft/119 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Union, drawn

The nearest airport reporting now, 2.3 mi from Union, South Carolina. From its report of Oct 16, 2026, 5:15 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 Union, 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 35AFIG. A THE SKY OVER UNIONSECTION, 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 MORE0510TITLEUnion, the skySTATION REPORT · ASOS 35ATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-35A-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

66.0 F with a dew point of 63.0 F, 90 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 Union: temperature 66.0 degrees Fahrenheit and dew point 63.0, 90 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 35AFIG. B THE AIR AT UNIONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATES 700 FT ABOVE THE STATION, AT 62.3 FTEMPERATURE 66.0 FDEW POINT 63.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLEUnion, the airSTATION REPORT · ASOS 35ATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-35A-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 Union, 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 35AFIG. C THE WIND AT UNIONPLAN, 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 FORCE73TITLEUnion, the windSTATION REPORT · ASOS 35ATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-35A-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in South Carolina

21 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