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Donnellson, Iowa

City in Lee County, Iowa

Air quality

The air at Donnellson

Index 19, good, led by ozone. Read at 11 PM from its reporting area, Lake Sugema (IA), 23 miles off.

19Good
  • Fine particles (PM2.5)7Good23.2 mi
  • Ozone19Good19 ppb23.2 mi
  • Nitrogen dioxide0Good0.6 ppb23.2 mi
  • Sulfur dioxide0Good0 ppb23.2 mi

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 28, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 7 PM.

SatSun

Precipitation

What has fallen at Donnellson

None in the last 24 hours; 0.46 in over the last 3 days, to Fri 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.46in

Visibility

How far you can see at Donnellson, the next 45 hours

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

SatSun

On the radar over Donnellson, IowaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Donnellson, 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

ArgyleRARI4

Beside a road/12.3 mi away/518 ft/186 ft below here

temp, pavement temp, wind, visibility, precip

Rank406of 1,055

measured daily2 instruments

DonnellsonDNNI4

At a cooperative observer's station/0.6 mi away/696 ft/8 ft below here

snowfall, snow depth, precip, high, low

Rank84of 1,055

Station report

The weather at Fort Madison, drawn

The nearest airport reporting now, 12.6 mi from Donnellson, Iowa. From its report of Oct 16, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Fort Madison, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FSWFIG. A THE SKY OVER FORT MADISONSECTION, 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: 10 MI OR MORE0510TITLEFort Madison, the skySTATION REPORT · ASOS FSWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-FSW-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.8 F with a dew point of 37.4 F, 81 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up.

Chart of the air at Fort Madison: temperature 42.8 degrees Fahrenheit and dew point 37.4, 81 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; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FSWFIG. B THE AIR AT FORT MADISONTHE 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 FSATURATES 1,200 FT ABOVE THE STATION, AT 36.2 FTEMPERATURE 42.8 FDEW POINT 37.4 FSPREAD 5.4 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 POINTTITLEFort Madison, the airSTATION REPORT · ASOS FSWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-FSW-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 31 mph.

Plan of the wind at Fort Madison, north up: blowing from 310 degrees, the northwest, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FSWFIG. C THE WIND AT FORT MADISONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFort Madison, the windSTATION REPORT · ASOS FSWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-FSW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Donnellson (DNNI4), 0.6 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in Iowa

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

Near Donnellson

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

Near Donnellson

River and lake gauges