Storm Station
Sign in

Knollwood, Texas

City in Grayson County, Texas

Air quality

The air at Knollwood

Index 7, good, led by fine particles. Read at 9 PM from its reporting area, Ardmore (OK), 52 miles off.

7Good
  • Fine particles (PM2.5)7Good-

The days ahead

Highest 80, moderate, Mon Oct 19, led by ozone. Yesterday measured 16, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 1 PM.

FriSat

Precipitation

What has fallen at Knollwood

0.05 in in the last 24 hours, and none in the 2 days before, to Thu 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.05in

Visibility

How far you can see at Knollwood, the next 41 hours

Mist or haze: visibility falls to 3 miles Thu 11 PM.

FriSat

On the radar over Knollwood, TexasReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Knollwood, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now3 instruments

measured daily2 instruments

Sherman 3.3 NNWTX-GA-68

In a volunteer observer's own ground/2.3 mi away/734 ft/94 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Sherman/Denison, drawn

The nearest airport reporting now, 3.6 mi from Knollwood, Texas. From its report of Oct 15, 2026, 9:15 PM local time: 3 of its 6 sheets.

The sky

Scattered at 700 ft, scattered at 6,000 ft, overcast at 8,500 ft; the ceiling is 8,500 ft; visibility 10 mi or more.

Section of the sky over Sherman/Denison, height above the station to scale: scattered cloud with its base at 700 feet, scattered cloud with its base at 6,000 feet, overcast cloud with its base at 8,500 feet, the ceiling at 8,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYIFIG. A THE SKY OVER SHERMAN/DENISONSECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 8,500 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 6,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYSCT 700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 8,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESherman/Denison, the skySTATION REPORT · ASOS GYITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-GYI-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

69.4 F with a dew point of 68.0 F, 95 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 300 ft up; the lowest cloud reported is at 700 ft.

Chart of the air at Sherman/Denison: temperature 69.4 degrees Fahrenheit and dew point 68.0, 95 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 300 feet above the station, against the lowest cloud reported at 700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYIFIG. B THE AIR AT SHERMAN/DENISONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00060 F70 F80 FSATURATES 300 FT ABOVE THE STATION, AT 67.6 FLOWEST CLOUD REPORTED, SCT 700 FTTEMPERATURE AND DEW POINT 69.4 F, 68.0 FRELATIVE HUMIDITY 95 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 POINTTITLESherman/Denison, the airSTATION REPORT · ASOS GYITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-GYI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 29 mph.

Plan of the wind at Sherman/Denison, north up: blowing from 340 degrees, the north northwest, at 12 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYIFIG. C THE WIND AT SHERMAN/DENISONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESherman/Denison, the windSTATION REPORT · ASOS GYITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-GYI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Texas

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

Near Knollwood

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

Near Knollwood

River and lake gauges