Storm Station
Sign in

Mount Carroll, Illinois

City in Carroll County, Illinois

Air quality

The air at Mount Carroll

Index 23, good, led by fine particles. Read at 3 AM from its reporting area, Clinton (IA), 21 miles off.

23Good
  • Fine particles (PM2.5)23Good22.5 mi
  • Ozone11Good14 ppb18.6 mi
  • Sulfur dioxide0Good0.1 ppb22.5 mi

The days ahead

Yesterday measured 22, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Mount Carroll

0.28 in in the last 24 hours, and none in the 2 days before, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.28in
Last 3 days
0.28in

Visibility

How far you can see at Mount Carroll, the next 41 hours

Visibility stays 8 miles or more through Sat 7 PM, lowest 9 miles Sat 8 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Mount Carroll, 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

SavannaSFY

At an airfield/7.6 mi away/617 ft/151 ft below here

temp, wind, gust, visibility, precip, pressure

Rank750of 1,393

measured daily2 instruments

Mount CarrollMTCI2

At a cooperative observer's station/0.4 mi away/725 ft/43 ft below here

snowfall, snow depth, precip, high, low

Rank48of 1,393

Station report

The weather at Savanna, drawn

The nearest airport reporting now, 7.6 mi from Mount Carroll, Illinois. From its report of Oct 16, 2026, 3:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,700 ft; the ceiling is 2,700 ft; visibility 10 mi or more.

Section of the sky over Savanna, height above the station to scale: overcast cloud with its base at 2,700 feet, the ceiling at 2,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFYFIG. A THE SKY OVER SAVANNASECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,700 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESavanna, the skySTATION REPORT · ASOS SFYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SFY-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

49.6 F with a dew point of 44.0 F, 81 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,300 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at Savanna: temperature 49.6 degrees Fahrenheit and dew point 44.0, 81 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,300 feet above the station, against the lowest cloud reported at 2,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFYFIG. B THE AIR AT SAVANNATHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 1,300 FT ABOVE THE STATION, AT 42.8 FLOWEST CLOUD REPORTED, OVC 2,700 FTTEMPERATURE 49.6 FDEW POINT 44.0 FSPREAD 5.6 FRELATIVE HUMIDITY 81 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 POINTTITLESavanna, the airSTATION REPORT · ASOS SFYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SFY-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 14 mph, gusting 20 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at Savanna, north up: blowing from 290 degrees, the west northwest, at 14 miles an hour, gusting 20; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SFYFIG. C THE WIND AT SAVANNAPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE19GUST, 20 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESavanna, the windSTATION REPORT · ASOS SFYTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SFY-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Illinois

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

Near Mount Carroll

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

Near Mount Carroll

River and lake gauges