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Prophetstown, Illinois

City in Whiteside County, Illinois

Air quality

The air at Prophetstown

Index 23, good, led by fine particles. Read at 4 AM from its reporting area, Clinton (IA), 18 miles off.

23Good
  • Fine particles (PM2.5)23Good17.6 mi
  • Ozone10Good15 ppb18.7 mi
  • Sulfur dioxide0Good0 ppb17.6 mi

The days ahead

Yesterday measured 22, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Prophetstown

0.28 in in the last 24 hours, 0.30 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.28in
Last 3 days
0.30in

Visibility

How far you can see at Prophetstown, the next 46 hours

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

FriSat

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

What is measuring near here

The 6 instruments nearest Prophetstown, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now4 instruments

measured daily2 instruments

Prophetstown 0.1 WSWIL-WD-3

In a volunteer observer's own ground/0.1 mi away/630 ft/12 ft above here

precip, snowfall, snow depth

Rank-

MorrisonMISI2

At a cooperative observer's station/9.7 mi away/709 ft/91 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Sterling Rockfal, drawn

The nearest airport reporting now, 14.3 mi from Prophetstown, Illinois. From its report of Oct 16, 2026, 3:56 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,300 ft; the ceiling is 2,300 ft; visibility 10 mi or more.

Section of the sky over Sterling Rockfal, height above the station to scale: overcast cloud with its base at 2,300 feet, the ceiling at 2,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SQIFIG. A THE SKY OVER STERLING ROCKFALSECTION, 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESterling Rockfal, the skySTATION REPORT · ASOS SQITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SQI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

50.0 F with a dew point of 45.0 F, 83 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 2,300 ft.

Chart of the air at Sterling Rockfal: temperature 50.0 degrees Fahrenheit and dew point 45.0, 83 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 2,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SQIFIG. B THE AIR AT STERLING ROCKFALTHE 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 1,200 FT ABOVE THE STATION, AT 43.8 FLOWEST CLOUD REPORTED, OVC 2,300 FTTEMPERATURE 50.0 FDEW POINT 45.0 FSPREAD 5.0 FRELATIVE HUMIDITY 83 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 POINTTITLESterling Rockfal, the airSTATION REPORT · ASOS SQITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SQI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (270 degrees) at 17 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 31 mph.

Plan of the wind at Sterling Rockfal, north up: blowing from 270 degrees, the west, at 17 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SQIFIG. C THE WIND AT STERLING ROCKFALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 270°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESterling Rockfal, the windSTATION REPORT · ASOS SQITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SQI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Illinois

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

Near Prophetstown

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

Near Prophetstown

River and lake gauges