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Leroy, Indiana

Community in Lake County, Indiana

Air quality

The air at Leroy

Index 38, good, led by fine particles. Read at 10 PM from its reporting area, Hammond-Gary (IN), 15 miles off.

38Good
  • Fine particles (PM2.5)38Good17.1 mi
  • Ozone13Good14 ppb16 mi
  • Coarse particles (PM10)16Good17.1 mi
  • Nitrogen dioxide3Good3.3 ppb17.1 mi
  • Sulfur dioxide0Good0.3 ppb17.1 mi

The days ahead

Good each day through Fri Oct 16, led by ozone. Yesterday measured 40, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Leroy

0.03 in in the last 24 hours, 0.19 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.03in
Last 3 days
0.19in

Visibility

How far you can see at Leroy, the next 45 hours

Mist or haze: visibility falls to 2 miles Sat 3 AM.

FriSat

On the radar over Leroy, IndianaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Leroy, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.2 miles away.

measured now4 instruments

ValparaisoVPZ

At an airfield/15.2 mi away/758 ft/75 ft above here

temp, wind, gust, visibility, precip, pressure

Rank4of 1,111

measured daily2 instruments

Crown Point 1NCRPI3

At a cooperative observer's station/7.0 mi away/699 ft/16 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Valparaiso, drawn

The nearest airport reporting now, 15.2 mi from Leroy, Indiana. From its report of Oct 15, 2026, 10:56 PM local time: 3 of its 6 sheets.

The sky

Overcast at 1,300 ft; the ceiling is 1,300 ft; visibility 10 mi or more.

Section of the sky over Valparaiso, height above the station to scale: overcast cloud with its base at 1,300 feet, the ceiling at 1,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VPZFIG. A THE SKY OVER VALPARAISOSECTION, 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 1,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEValparaiso, the skySTATION REPORT · ASOS VPZTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-VPZ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

67.0 F with a dew point of 65.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Valparaiso: temperature 67.0 degrees Fahrenheit and dew point 65.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VPZFIG. B THE AIR AT VALPARAISOTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATES 500 FT ABOVE THE STATION, AT 64.5 FLOWEST CLOUD REPORTED, OVC 1,300 FTTEMPERATURE AND DEW POINT 67.0 F, 65.0 FRELATIVE HUMIDITY 93 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 POINTTITLEValparaiso, the airSTATION REPORT · ASOS VPZTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-VPZ-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (260 degrees) at 14 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 33 mph.

Plan of the wind at Valparaiso, north up: blowing from 260 degrees, the west, at 14 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 VPZFIG. C THE WIND AT VALPARAISOPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 260°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEValparaiso, the windSTATION REPORT · ASOS VPZTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-VPZ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Indiana

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

Near Leroy

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

Near Leroy

River and lake gauges