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Grand River, Iowa

City in Decatur County, Iowa

Air quality

The air at Grand River

Index 24, good, led by fine particles. Read at 2 AM from its reporting area, Des Moines (IA), 52 miles off.

24Good
  • Fine particles (PM2.5)24Good-
  • Ozone17Good-

The days ahead

Good each day through Sat Oct 17, led by fine particles. Yesterday measured 13, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Grand River

0.21 in in the last 24 hours, and none in the 2 days before, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.21in
Last 3 days
0.21in

Visibility

How far you can see at Grand River, the next 42 hours

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

FriSat

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

What is measuring near here

The 5 instruments nearest Grand River, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now3 instruments

LamoniLWD

At an airfield/13.4 mi away/1,093 ft/76 ft above here

temp, wind, gust, visibility, precip, pressure

Rank154of 1,060

measured daily2 instruments

Grand River 0.5 NEIA-DC-11

In a volunteer observer's own ground/0.5 mi away/991 ft/26 ft below here

precip, snowfall, snow depth

Rank-

BeaconsfieldBCNI4

At a cooperative observer's station/4.2 mi away/1,181 ft/164 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Lamoni, drawn

The nearest airport reporting now, 13.4 mi from Grand River, Iowa. From its report of Oct 16, 2026, 1:53 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 Lamoni, 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 LWDFIG. A THE SKY OVER LAMONISECTION, 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 MORE0510TITLELamoni, the skySTATION REPORT · ASOS LWDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LWD-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

45.0 F with a dew point of 38.0 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 Lamoni: temperature 45.0 degrees Fahrenheit and dew point 38.0, 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 LWDFIG. B THE AIR AT LAMONITHE 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 36.5 FTEMPERATURE 45.0 FDEW POINT 38.0 FSPREAD 7.0 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 POINTTITLELamoni, the airSTATION REPORT · ASOS LWDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LWD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 13 mph, gusting 21 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Lamoni, north up: blowing from 300 degrees, the west northwest, at 13 miles an hour, gusting 21; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LWDFIG. C THE WIND AT LAMONIPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE19GUST, 21 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELamoni, the windSTATION REPORT · ASOS LWDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LWD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Lamoni, 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 Grand River

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

Near Grand River

River and lake gauges