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Crystal Lake, Iowa

City in Hancock County, Iowa

Air quality

The air at Crystal Lake

Index 19, good, led by fine particles. Read at 1 AM from its reporting area, South Central Minnesota (MN), 73 miles off.

19Good
  • Fine particles (PM2.5)19Good-
  • Ozone14Good-

The days ahead

Good each day through Sun Oct 18, led by ozone. Yesterday measured 26, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Crystal Lake

0.96 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
0.96in
Last 3 days
0.96in

Visibility

How far you can see at Crystal Lake, the next 43 hours

Visibility stays 5 miles or more through Sat 7 PM, lowest 6 miles Fri 8 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Crystal Lake, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.3 miles away.

measured now3 instruments

LelandRLDI4

Beside a road/12.9 mi away/1,270 ft/16 ft below here

temp, pavement temp, wind, visibility, precip

Rank661of 1,060

measured daily2 instruments

Britt 8.2 NNWIA-HN-8

In a volunteer observer's own ground/2.3 mi away/1,332 ft/46 ft above here

precip, snowfall, snow depth

Rank-

Forest City 2 NNEFSCI4

At a cooperative observer's station/9.2 mi away/1,263 ft/23 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Forest City, drawn

The nearest airport reporting now, 8.5 mi from Crystal Lake, Iowa. From its report of Oct 16, 2026, 1:10 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,900 ft; the ceiling is 1,900 ft; visibility 10 mi or more.

Section of the sky over Forest City, height above the station to scale: overcast cloud with its base at 1,900 feet, the ceiling at 1,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FXYFIG. A THE SKY OVER FOREST CITYSECTION, 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 SHEETOVC 1,900 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEForest City, the skySTATION REPORT · ASOS FXYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-FXY-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

44.6 F with a dew point of 39.2 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; the lowest cloud reported is at 1,900 ft.

Chart of the air at Forest City: temperature 44.6 degrees Fahrenheit and dew point 39.2, 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, against the lowest cloud reported at 1,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FXYFIG. B THE AIR AT FOREST CITYTHE 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 1,200 FT ABOVE THE STATION, AT 38.0 FLOWEST CLOUD REPORTED, OVC 1,900 FTTEMPERATURE 44.6 FDEW POINT 39.2 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 POINTTITLEForest City, the airSTATION REPORT · ASOS FXYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-FXY-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 13 mph, gusting 18 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at Forest City, north up: blowing from 280 degrees, the west, at 13 miles an hour, gusting 18; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FXYFIG. C THE WIND AT FOREST CITYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEForest City, the windSTATION REPORT · ASOS FXYTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-FXY-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Forest City, 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 Crystal Lake

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

Near Crystal Lake

River and lake gauges