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Green Mountain, Iowa

Community in Marshall County, Iowa

Air quality

The air at Green Mountain

Index 43, good, led by fine particles. Read at 11 PM from its reporting area, Waterloo (IA), 35 miles off.

43Good
  • Fine particles (PM2.5)43Good-

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 31, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Green Mountain

0.90 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
0.90in
Last 3 days
0.90in

Visibility

How far you can see at Green Mountain, the next 45 hours

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Sat 2 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Green Mountain, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.9 miles away.

measured now3 instruments

measured daily2 instruments

MarshalltownMSHI4

At a cooperative observer's station/6.3 mi away/899 ft/88 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Marshalltown, drawn

The nearest airport reporting now, 4.9 mi from Green Mountain, Iowa. From its report of Oct 15, 2026, 10:53 PM local time: 3 of its 6 sheets.

The sky

Scattered at 3,600 ft, overcast at 4,900 ft; the ceiling is 4,900 ft; visibility 10 mi or more.

Section of the sky over Marshalltown, height above the station to scale: scattered cloud with its base at 3,600 feet, overcast cloud with its base at 4,900 feet, the ceiling at 4,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MIWFIG. A THE SKY OVER MARSHALLTOWNSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,900 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 3,600 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 4,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMarshalltown, the skySTATION REPORT · ASOS MIWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MIW-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

50.0 F with a dew point of 42.0 F, 74 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up; the lowest cloud reported is at 3,600 ft.

Chart of the air at Marshalltown: temperature 50.0 degrees Fahrenheit and dew point 42.0, 74 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station, against the lowest cloud reported at 3,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MIWFIG. B THE AIR AT MARSHALLTOWNTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00030 F40 F50 F60 FSATURATES 1,800 FT ABOVE THE STATION, AT 40.2 FLOWEST CLOUD REPORTED, SCT 3,600 FTTEMPERATURE 50.0 FDEW POINT 42.0 FSPREAD 8.0 FRELATIVE HUMIDITY 74 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 POINTTITLEMarshalltown, the airSTATION REPORT · ASOS MIWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MIW-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 17 mph, gusting 29 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Marshalltown, north up: blowing from 320 degrees, the northwest, at 17 miles an hour, gusting 29; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MIWFIG. C THE WIND AT MARSHALLTOWNPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 29 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMarshalltown, the windSTATION REPORT · ASOS MIWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MIW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Iowa

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

Near Green Mountain

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

Near Green Mountain

River and lake gauges