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Castalian Springs, Tennessee

Community in Sumner County, Tennessee

Air quality

The air at Castalian Springs

Index 54, moderate, led by fine particles. Read at 12 AM from its reporting area, Nashville (TN), 32 miles off.

54Moderate
  • Fine particles (PM2.5)54Moderate20.9 mi
  • Ozone44Good12 ppb20.9 mi
  • Coarse particles (PM10)20Good-

The days ahead

Good each day through Sat Oct 17, led by ozone. Yesterday measured 46, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 7 PM: the index from smoke stays at 17 or under.

FriSat

Precipitation

What has fallen at Castalian Springs

None in the last 24 hours; 0.02 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.02in

Visibility

How far you can see at Castalian Springs, the next 44 hours

Visibility stays 10 miles or more through Sat 7 PM.

FriSat

On the radar over Castalian Springs, TennesseeReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Castalian Springs, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.7 miles away.

measured now3 instruments

SumnerXNX

At an airfield/6.3 mi away/551 ft/53 ft below here

temp, wind, gust, visibility, precip, pressure

Rank352of 1,019

measured daily2 instruments

Gallatin 6.3 ETN-SR-108

In a volunteer observer's own ground/2.7 mi away/454 ft/150 ft below here

precip, snowfall, snow depth

Rank-

Bethpage 1SBETT1

At a cooperative observer's station/4.8 mi away/594 ft/10 ft below here

snowfall, snow depth, precip, high, low

Rank177of 1,019

Station report

The weather at Sumner, drawn

The nearest airport reporting now, 6.3 mi from Castalian Springs, Tennessee. From its report of Oct 16, 2026, 12:15 AM local time: 3 of its 6 sheets.

The sky

Scattered at 12,000 ft; visibility 10 mi or more.

Section of the sky over Sumner, height above the station to scale: scattered cloud with its base at 12,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XNXFIG. A THE SKY OVER SUMNERSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTSCT 12,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLESumner, the skySTATION REPORT · ASOS XNXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-XNX-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

73.4 F with a dew point of 59.0 F, 61 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,300 ft up; the lowest cloud reported is at 12,000 ft.

Chart of the air at Sumner: temperature 73.4 degrees Fahrenheit and dew point 59.0, 61 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,300 feet above the station, against the lowest cloud reported at 12,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XNXFIG. B THE AIR AT SUMNERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00040 F50 F60 F70 F80 FSATURATES 3,300 FT ABOVE THE STATION, AT 55.6 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, SCT 12,000 FTTEMPERATURE 73.4 FDEW POINT 59.0 FSPREAD 14.4 FRELATIVE HUMIDITY 61 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 POINTTITLESumner, the airSTATION REPORT · ASOS XNXTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-XNX-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Sumner, 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 XNXFIG. C THE WIND AT SUMNERPLAN, 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 FORCE73TITLESumner, the windSTATION REPORT · ASOS XNXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-XNX-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Bethpage 1S (BETT1), 4.8 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Tennessee

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

Near Castalian Springs

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

Near Castalian Springs

River and lake gauges