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Shell Rock, Iowa

City in Butler County, Iowa

Air quality

The air at Shell Rock

Index 43, good, led by fine particles. Read at 11 PM from its reporting area, Waterloo (IA), 17 miles off.

43Good
  • Fine particles (PM2.5)43Good19.7 mi
  • Ozone-17 ppb4.1 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 31, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Shell Rock

1.10 in in the last 24 hours, and none in the 2 days before, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
1.10in
Last 3 days
1.10in

Visibility

How far you can see at Shell Rock, the next 44 hours

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Sat 3 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Shell Rock, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.8 miles away.

measured now3 instruments

WaterlooALO

At an airfield/14.2 mi away/879 ft/27 ft below here

temp, wind, gust, visibility, precip, pressure

Rank6of 1,060

measured daily2 instruments

Waverly 1.0 WSWIA-BM-5

In a volunteer observer's own ground/4.8 mi away/953 ft/47 ft above here

precip, snowfall, snow depth

Rank-

AllisonASNI4

At a cooperative observer's station/10.6 mi away/1,047 ft/141 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Waterloo, drawn

The nearest airport reporting now, 14.2 mi from Shell Rock, Iowa. From its report of Oct 15, 2026, 11:54 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 Waterloo, 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 ALOFIG. A THE SKY OVER WATERLOOSECTION, 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 MORE0510TITLEWaterloo, the skySTATION REPORT · ASOS ALOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ALO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

46.0 F with a dew point of 40.0 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at Waterloo: temperature 46.0 degrees Fahrenheit and dew point 40.0, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALOFIG. B THE AIR AT WATERLOOTHE 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 1,400 FT ABOVE THE STATION, AT 38.7 FTEMPERATURE 46.0 FDEW POINT 40.0 FSPREAD 6.0 FRELATIVE HUMIDITY 79 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 POINTTITLEWaterloo, the airSTATION REPORT · ASOS ALOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ALO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 17 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 39 mph.

Plan of the wind at Waterloo, north up: blowing from 300 degrees, the west northwest, 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 ALOFIG. C THE WIND AT WATERLOOPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWaterloo, the windSTATION REPORT · ASOS ALOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ALO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Allison (ASNI4), 10.6 miles from here, read 9 Oct, 07:00. measured daily

Elsewhere in Iowa

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

Near Shell Rock

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

Near Shell Rock

River and lake gauges