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Alto Pass, Illinois

Village in Union County, Illinois

Air quality

The air at Alto Pass

Index 19, good, led by ozone. Read at 10 AM from its reporting area, Farrar (MO), 23 miles off.

19Good
  • Ozone19Good18 ppb22.7 mi

The days ahead

Yesterday measured 26, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 7 AM.

FriSatSun

Precipitation

What has fallen at Alto Pass

0.05 in in the last 24 hours, 0.57 in over the last 3 days, to Fri 9 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.57in

Visibility

How far you can see at Alto Pass, the next 46 hours

Visibility stays 8 miles or more through Sun 7 AM, lowest 9 miles Fri 10 PM.

FriSatSun

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

What is measuring near here

The 6 instruments nearest Alto Pass, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

measured daily2 instruments

Alto Pass 0.2 NIL-UN-14

In a volunteer observer's own ground/0.2 mi away/753 ft/29 ft above here

precip, snowfall, snow depth

Rank-

Anna 2 NNEANNI2

At a cooperative observer's station/8.1 mi away/640 ft/84 ft below here

snowfall, snow depth, precip, high, low

Rank49of 1,393

Station report

The weather at Carbondale/Murph, drawn

The nearest airport reporting now, 14.8 mi from Alto Pass, Illinois. From its report of Oct 16, 2026, 9:52 AM local time: 3 of its 6 sheets.

The sky

Broken at 2,700 ft, broken at 4,600 ft, overcast at 10,000 ft; the ceiling is 2,700 ft; visibility 10 mi or more.

Section of the sky over Carbondale/Murph, height above the station to scale: broken cloud with its base at 2,700 feet, broken cloud with its base at 4,600 feet, overcast cloud with its base at 10,000 feet, the ceiling at 2,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MDHFIG. A THE SKY OVER CARBONDALE/MURPHSECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 10,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 4,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 2,700 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECarbondale/Murph, the skySTATION REPORT · ASOS MDHTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MDH-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

54.0 F with a dew point of 42.0 F, 64 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,700 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at Carbondale/Murph: temperature 54.0 degrees Fahrenheit and dew point 42.0, 64 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,700 feet above the station, against the lowest cloud reported at 2,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MDHFIG. B THE AIR AT CARBONDALE/MURPHTHE 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 2,700 FT ABOVE THE STATION, AT 39.4 FLOWEST CLOUD REPORTED, BKN 2,700 FTTEMPERATURE 54.0 FDEW POINT 42.0 FSPREAD 12.0 FRELATIVE HUMIDITY 64 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 POINTTITLECarbondale/Murph, the airSTATION REPORT · ASOS MDHTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MDH-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 13 mph, gusting 23 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 38 mph.

Plan of the wind at Carbondale/Murph, north up: blowing from 340 degrees, the north northwest, at 13 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 MDHFIG. C THE WIND AT CARBONDALE/MURPHPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE19GUST, 23 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECarbondale/Murph, the windSTATION REPORT · ASOS MDHTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MDH-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Carbondale/Murph, 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 Alto Pass

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

Near Alto Pass

River and lake gauges