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Northwoods, Missouri

City in St. Louis County, Missouri

Air quality

The air at Northwoods

Index 15, good, led by ozone. Read at 5 AM from its reporting area, St. Louis (Metro-east) (IL), 19 miles off.

15Good
  • Fine particles (PM2.5)9Good4.8 mi
  • Ozone15Good16 ppb5.3 mi
  • Coarse particles (PM10)4Good5.3 mi
  • Nitrogen dioxide3Good3.8 ppb4.8 mi
  • Sulfur dioxide0Good0.4 ppb5.3 mi
  • Carbon monoxide-0.1 ppm4.8 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 18, good.

Smoke, the next 45 hours

No smoke near the ground through Mon 1 AM.

SatSun

Precipitation

What has fallen at Northwoods

0.09 in in the last 24 hours, 1.30 in over the last 3 days, to Sat 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.09in
Last 3 days
1.30in

Visibility

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

Visibility stays 9 miles or more through Mon 1 AM, lowest 10 miles Sat 7 AM.

SatSun

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

What is measuring near here

The 6 instruments nearest Northwoods, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.5 miles away.

measured now4 instruments

St. LouisSTL

At an airfield/6.1 mi away/561 ft/31 ft below here

temp, wind, gust, visibility, precip, pressure

Rank782of 1,043

measured daily2 instruments

Normandy 0.6 SWMO-SL-120

In a volunteer observer's own ground/1.5 mi away/632 ft/40 ft above here

precip, snowfall, snow depth

Rank-

Science CenterSSCM7

At a cooperative observer's station/6.5 mi away/486 ft/106 ft below here

snowfall, snow depth, precip, high, low

Rank800of 1,043

Station report

The weather at St. Louis, drawn

The nearest airport reporting now, 6.1 mi from Northwoods, Missouri. From its report of Oct 17, 2026, 4:51 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 St. Louis, 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 STLFIG. A THE SKY OVER ST. LOUISSECTION, 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 MORE0510TITLESt. Louis, the skySTATION REPORT · ASOS STLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-STL-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

44.0 F with a dew point of 38.0 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at St. Louis: temperature 44.0 degrees Fahrenheit and dew point 38.0, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STLFIG. B THE AIR AT ST. LOUISTHE 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 1,400 FT ABOVE THE STATION, AT 36.7 FTEMPERATURE 44.0 FDEW POINT 38.0 FSPREAD 6.0 FRELATIVE HUMIDITY 79 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, the airSTATION REPORT · ASOS STLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-STL-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at St. Louis, north up: blowing from 350 degrees, the north, at 7 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 STLFIG. C THE WIND AT ST. LOUISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESt. Louis, the windSTATION REPORT · ASOS STLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-STL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Science Center (SSCM7), 6.5 miles from here, read 16 Oct, 16:30. measured daily

Elsewhere in Missouri

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

Near Northwoods

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

Near Northwoods

River and lake gauges