Storm Station
Big Rock, Illinois
53°
Partly cloudy· Feels like 53°·Light air 3 mph NE
Partly sunny. High near 71, with temperatures falling to around 69 in the afternoon. Northeast wind around 5 mph.
-UV
-Air quality
91%Humidity
56%Cloud

What is measuring near here

The 6 instruments nearest Big Rock, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now4 instruments

Chicago/AuroraARR

At an airfield/3.3 mi away/705 ft/1 ft above here

temp, wind, gust, visibility, precip, pressure

Rank16of 417

Shabbona 5 NNE54811

At a climate reference station/16.9 mi away/861 ft/157 ft above here

temp, humidity, wind, solar, precip

Rank-

ShabbonaSBNI2

At a river or reservoir gauge/17.0 mi away/863 ft/159 ft above here

temp, wind, gust, humidity, pressure

Rank94of 417

Harmony @ GenoaIMC01

Beside a road/30.4 mi away/830 ft/126 ft above here

temp, pavement temp, wind, visibility, precip

Rank411of 417

measured daily2 instruments

Sugar Grove 3.0 SWIL-KN-146

In a volunteer observer's own ground/2.5 mi away/688 ft/16 ft below here

precip, snowfall, snow depth

Rank-

Aurora WaterARRI2

At a cooperative observer's station/12.1 mi away/676 ft/28 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Chicago/Aurora, drawn

The nearest airport reporting now, 3.3 mi from Big Rock. From its report of Sep 27, 2026, 8:52 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 3 mi.

Section of the sky over Chicago/Aurora, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 3 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARRFIG. A THE SKY OVER CHICAGO/AURORASECTION, 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: 3 MI0510TITLEChicago/Aurora, the skySTATION REPORT · ASOS ARRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-ARR-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

57.0 F with a dew point of 56.0 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up.

Chart of the air at Chicago/Aurora: temperature 57.0 degrees Fahrenheit and dew point 56.0, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARRFIG. B THE AIR AT CHICAGO/AURORATHE 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 200 FT ABOVE THE STATION, AT 55.7 FTEMPERATURE AND DEW POINT 57.0 F, 56.0 FRELATIVE HUMIDITY 96 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 POINTTITLEChicago/Aurora, the airSTATION REPORT · ASOS ARRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-ARR-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east northeast (70 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Chicago/Aurora, north up: blowing from 70 degrees, the east northeast, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ARRFIG. C THE WIND AT CHICAGO/AURORAPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 70°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChicago/Aurora, the windSTATION REPORT · ASOS ARRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-ARR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Chicago/Aurora, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Aurora Water (ARRI2), 12.1 miles from here, read 26 Sep, 07:00. measured daily

Elsewhere in Illinois

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

Near Big Rock

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