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Barnhart, Missouri

Community in Jefferson County, Missouri

Air quality

The air at Barnhart

Index 27, good, led by ozone. Read at 10 PM from its reporting area, Saint Louis (MO), 26 miles off.

27Good
  • Fine particles (PM2.5)12Good7.5 mi
  • Ozone27Good16 ppb7.5 mi
  • Coarse particles (PM10)8Good7.5 mi
  • Nitrogen dioxide2Good2 ppb7.5 mi
  • Sulfur dioxide0Good0.4 ppb5.5 mi
  • Carbon monoxide-0.1 ppm21.3 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 44, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Barnhart

0.33 in in the last 24 hours, 0.79 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.33in
Last 3 days
0.79in

Visibility

How far you can see at Barnhart, the next 45 hours

Mist or haze: visibility falls to 3 miles Fri 3 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Barnhart, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

measured daily2 instruments

Barnhart 0.2 SWMO-JF-38

In a volunteer observer's own ground/0.4 mi away/531 ft/20 ft below here

precip, snowfall, snow depth

Rank-

Imperial 3NWIMPM7

At a cooperative observer's station/4.3 mi away/509 ft/42 ft below here

snowfall, snow depth, precip, high, low

Rank807of 1,014

Station report

The weather at St. Louis/Spirit, drawn

The nearest airport reporting now, 25.8 mi from Barnhart, Missouri. From its report of Oct 15, 2026, 10:54 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,600 ft, overcast at 2,400 ft; the ceiling is 1,600 ft; visibility 6 mi.

Section of the sky over St. Louis/Spirit, height above the station to scale: broken cloud with its base at 1,600 feet, overcast cloud with its base at 2,400 feet, the ceiling at 1,600 feet, and visibility of 6 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SUSFIG. A THE SKY OVER ST. LOUIS/SPIRITSECTION, 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 STATION05001,0001,5002,0002,5003,0003,5004,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,400 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,600 FTVISIBILITY, MILES: 6 MI0510TITLESt. Louis/Spirit, the skySTATION REPORT · ASOS SUSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SUS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

62.0 F with a dew point of 57.0 F, 84 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 1,600 ft.

Chart of the air at St. Louis/Spirit: temperature 62.0 degrees Fahrenheit and dew point 57.0, 84 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 1,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SUSFIG. B THE AIR AT ST. LOUIS/SPIRITTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 1,200 FT ABOVE THE STATION, AT 55.8 FLOWEST CLOUD REPORTED, BKN 1,600 FTTEMPERATURE 62.0 FDEW POINT 57.0 FSPREAD 5.0 FRELATIVE HUMIDITY 84 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. Louis/Spirit, the airSTATION REPORT · ASOS SUSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SUS-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 18 mph, gusting 28 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 33 mph.

Plan of the wind at St. Louis/Spirit, north up: blowing from 300 degrees, the west northwest, at 18 miles an hour, gusting 28; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SUSFIG. C THE WIND AT ST. LOUIS/SPIRITPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 28 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESt. Louis/Spirit, the windSTATION REPORT · ASOS SUSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SUS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of St. Louis/Spirit, 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 Barnhart

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

Near Barnhart

River and lake gauges