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Lewis, Iowa

City in Cass County, Iowa

Air quality

The air at Lewis

Index 27, good, led by fine particles. Read at 12 AM from its reporting area, Viking Lake State Park (IA), 24 miles off.

27Good
  • Fine particles (PM2.5)27Good23.6 mi
  • Ozone19Good18 ppb23.6 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 34, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Lewis

0.94 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.94in
Last 3 days
0.94in

Visibility

How far you can see at Lewis, the next 43 hours

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

FriSat

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

What is measuring near here

The 6 instruments nearest Lewis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.7 miles away.

measured now4 instruments

AtlanticAIO

At an airfield/7.3 mi away/1,154 ft/9 ft below here

temp, wind, gust, visibility, precip, pressure

Rank281of 1,060

Irwin 3 ESEIRWI4

At a river or reservoir gauge/32.3 mi away/1,322 ft/159 ft above here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Lewis 3.7 NWIA-CS-8

In a volunteer observer's own ground/3.7 mi away/1,135 ft/28 ft below here

precip, snowfall, snow depth

Rank-

Atlantic 1 NEATLI4

At a cooperative observer's station/8.9 mi away/1,168 ft/5 ft above here

snowfall, snow depth, precip, high, low

Rank841of 1,060

Station report

The weather at Atlantic, drawn

The nearest airport reporting now, 7.3 mi from Lewis, Iowa. From its report of Oct 16, 2026, 12:35 AM 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 Atlantic, 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 AIOFIG. A THE SKY OVER ATLANTICSECTION, 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 MORE0510TITLEAtlantic, the skySTATION REPORT · ASOS AIOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-AIO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

46.4 F with a dew point of 39.2 F, 76 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Atlantic: temperature 46.4 degrees Fahrenheit and dew point 39.2, 76 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AIOFIG. B THE AIR AT ATLANTICTHE 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 1,600 FT ABOVE THE STATION, AT 37.6 FTEMPERATURE 46.4 FDEW POINT 39.2 FSPREAD 7.2 FRELATIVE HUMIDITY 76 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 POINTTITLEAtlantic, the airSTATION REPORT · ASOS AIOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-AIO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Atlantic, north up: blowing from 310 degrees, the northwest, at 10 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 AIOFIG. C THE WIND AT ATLANTICPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAtlantic, the windSTATION REPORT · ASOS AIOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-AIO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Iowa

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

Near Lewis

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

Near Lewis

River and lake gauges