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Hannawa Falls, New York

Community in St. Lawrence County, New York

Air quality

The air at Hannawa Falls

Index 13, good, led by ozone. Read at 12 AM from its reporting area, Adirondacks Region (NY), 42 miles off.

13Good
  • Ozone13Good-

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 20, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Hannawa Falls

None in the last 24 hours; 1.65 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
1.65in

Visibility

How far you can see at Hannawa Falls, the next 44 hours

Mist or haze: visibility falls to 2 miles Fri 4 PM.

FriSat

On the radar over Hannawa Falls, New YorkReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Hannawa Falls, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now3 instruments

PotsdamPTD

At an airfield/5.4 mi away/461 ft/121 ft below here

temp, wind, gust, visibility, precip, pressure

Rank1,291of 1,432

measured daily2 instruments

Colton 2 NCLTN6

At a cooperative observer's station/1.4 mi away/554 ft/28 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Potsdam, drawn

The nearest airport reporting now, 5.4 mi from Hannawa Falls, New York. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 4,800 ft, broken at 7,500 ft, overcast at 11,000 ft; the ceiling is 7,500 ft; visibility 10 mi or more.

Section of the sky over Potsdam, height above the station to scale: a few clouds cloud with its base at 4,800 feet, broken cloud with its base at 7,500 feet, overcast cloud with its base at 11,000 feet, the ceiling at 7,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTDFIG. A THE SKY OVER POTSDAMSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,500ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 11,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 7,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYFEW 4,800 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 7,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEPotsdam, the skySTATION REPORT · ASOS PTDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PTD-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

48.2 F with a dew point of 39.2 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up; the lowest cloud reported is at 4,800 ft.

Chart of the air at Potsdam: temperature 48.2 degrees Fahrenheit and dew point 39.2, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station, against the lowest cloud reported at 4,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTDFIG. B THE AIR AT POTSDAMTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00030 F40 F50 F60 FSATURATES 2,100 FT ABOVE THE STATION, AT 37.2 FLOWEST CLOUD REPORTED, FEW 4,800 FTTEMPERATURE 48.2 FDEW POINT 39.2 FSPREAD 9.0 FRELATIVE HUMIDITY 71 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 POINTTITLEPotsdam, the airSTATION REPORT · ASOS PTDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PTD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Potsdam, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PTDFIG. C THE WIND AT POTSDAMPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPotsdam, the windSTATION REPORT · ASOS PTDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PTD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in New York

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

Near Hannawa Falls

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

Near Hannawa Falls

River and lake gauges