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Union Star, Missouri

Town in DeKalb County, Missouri

Air quality

The air at Union Star

Index 16, good, led by coarse particles. Read at 4 AM from its reporting area, St. Joseph (MO), 13 miles off.

16Good
  • Fine particles (PM2.5)7Good21.4 mi
  • Ozone-22 ppb13.3 mi
  • Coarse particles (PM10)16Good21.4 mi

The days ahead

Yesterday measured 20, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Union Star

0.07 in in the last 24 hours, 0.13 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.07in
Last 3 days
0.13in

Visibility

How far you can see at Union Star, the next 46 hours

Visibility stays 7 miles or more through Sun 1 AM, lowest 8 miles Sat 7 AM.

FriSat

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

What is measuring near here

The 4 instruments nearest Union Star, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.2 miles away.

measured now2 instruments

St. JosephSTJ

At an airfield/21.8 mi away/810 ft/164 ft below here

temp, wind, gust, visibility, precip, pressure

Rank229of 1,014

measured daily2 instruments

King City 4.7 WMO-AW-3

In a volunteer observer's own ground/5.2 mi away/1,073 ft/99 ft above here

precip, snowfall, snow depth

Rank-

Cosby 2WCSBM7

At a cooperative observer's station/10.4 mi away/932 ft/42 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at St. Joseph, drawn

The nearest airport reporting now, 21.8 mi from Union Star, Missouri. From its report of Oct 16, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

Overcast at 5,000 ft; the ceiling is 5,000 ft; visibility 10 mi or more.

Section of the sky over St. Joseph, height above the station to scale: overcast cloud with its base at 5,000 feet, the ceiling at 5,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STJFIG. A THE SKY OVER ST. JOSEPHSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 5,000 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 5,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESt. Joseph, the skySTATION REPORT · ASOS STJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-STJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

48.0 F with a dew point of 37.0 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; the lowest cloud reported is at 5,000 ft.

Chart of the air at St. Joseph: temperature 48.0 degrees Fahrenheit and dew point 37.0, 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, against the lowest cloud reported at 5,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STJFIG. B THE AIR AT ST. JOSEPHTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00020 F30 F40 F50 F60 FSATURATES 2,500 FT ABOVE THE STATION, AT 34.6 FLOWEST CLOUD REPORTED, OVC 5,000 FTTEMPERATURE 48.0 FDEW POINT 37.0 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 POINTTITLESt. Joseph, the airSTATION REPORT · ASOS STJTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-STJ-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 13 mph, gusting 22 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at St. Joseph, north up: blowing from 300 degrees, the west northwest, at 13 miles an hour, gusting 22; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STJFIG. C THE WIND AT ST. JOSEPHPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE19GUST, 22 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESt. Joseph, the windSTATION REPORT · ASOS STJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-STJ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Missouri

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

Near Union Star

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

Near Union Star

River and lake gauges