Storm Station
Sign in

Fidelity, Illinois

Village in Jersey County, Illinois

Air quality

The air at Fidelity

Index 20, good, led by fine particles. Read at 7 AM from its reporting area, St. Louis (Metro-east) (IL), 41 miles off.

20Good
  • Fine particles (PM2.5)20Good10.4 mi
  • Ozone20Good19 ppb10.4 mi
  • Coarse particles (PM10)12Good-
  • Nitrogen dioxide2Good2.3 ppb19.5 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 39, good.

Smoke, the next 42 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Fidelity

1.55 in in the last 24 hours, 1.85 in over the last 3 days, to Fri 7 AM. Measured by radar and rain gauges, as water.

Last 24 hours
1.55in
Last 3 days
1.85in

Visibility

How far you can see at Fidelity, the next 42 hours

Visibility stays 8 miles or more through Sun 1 AM, lowest 8 miles Fri 3 PM.

FriSat

On the radar over Fidelity, IllinoisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Fidelity, 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

Medora 1.4 SIL-MP-1

In a volunteer observer's own ground/1.2 mi away/604 ft/28 ft below here

precip, snowfall, snow depth

Rank-

MedoraMEDI2

At a cooperative observer's station/1.8 mi away/604 ft/28 ft below here

snowfall, snow depth, precip, high, low

Rank1,218of 1,393

Station report

The weather at Alton/St Louis R, drawn

The nearest airport reporting now, 19.4 mi from Fidelity, Illinois. From its report of Oct 16, 2026, 7:50 AM local time: 3 of its 6 sheets.

The sky

Clear; visibility 10 mi or more.

Section of the sky over Alton/St Louis R, height above the station to scale: a clear sky, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALNFIG. A THE SKY OVER ALTON/ST LOUIS RSECTION, 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 STATIONCLEARVISIBILITY, MILES: 10 MI OR MORE0510TITLEAlton/St Louis R, the skySTATION REPORT · ASOS ALNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ALN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

48.2 F with a dew point of 39.2 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up.

Chart of the air at Alton/St Louis R: temperature 48.2 degrees Fahrenheit and dew point 39.2, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALNFIG. B THE AIR AT ALTON/ST LOUIS RTHE 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 F60 FSATURATES 2,100 FT ABOVE THE STATION, AT 37.2 FTEMPERATURE 48.2 FDEW POINT 39.2 FSPREAD 9.0 FRELATIVE HUMIDITY 71 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 POINTTITLEAlton/St Louis R, the airSTATION REPORT · ASOS ALNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ALN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 16 mph, gusting 23 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 30 mph.

Plan of the wind at Alton/St Louis R, north up: blowing from 320 degrees, the northwest, at 16 miles an hour, gusting 23; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALNFIG. C THE WIND AT ALTON/ST LOUIS RPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 16 MPH5FRESH BREEZE19GUST, 23 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAlton/St Louis R, the windSTATION REPORT · ASOS ALNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ALN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Medora (MEDI2), 1.8 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in Illinois

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

Near Fidelity

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

Near Fidelity

River and lake gauges