Storm Station

In a volunteer observer's own ground

CWOP network, identified by the register

Identifier
DW9174
Latitude
39.27000 N
Longitude
77.67000 W
Elevation
502 ft
Rank
-
Air temperature
59F
Relative humidity
94%
Pressure
30.2inHg
Wind
0mph
Gust
0mph
Wind direction
342°
Precipitation this hour
0in
Precipitation today
0in

On the radar over Citizen station DW9174ReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

In a volunteer observer's own ground

Drawn as the kind of place it stands at. 1,414 instruments in Virginia stand at one.

Station charts

Citizen station DW9174 Report

Rank
-
Time to reach Storm Station
18 s9 in 10 within 30 s
Against its reference, 30 days
-1.9 °Fcooler than the airport station KJYO, 14 miles away, on average over 12 readings; typical difference 2.3 °F

Against its reference: each temperature this station reports is compared with the nearest airport or climate reference station that reported within half an hour, up to 15 miles away. The figure is its reading less the reference's, on average, as both were reported; the typical difference is the root mean square. The difference in height is shown where both heights are known.

Chart of the 1,183 ranked stations in Virginia on Oct 4 by the share of their scheduled reports received in Storm Station's own record, up to 7 days, in tenths: 0 to 9 per cent, 4; 10 to 19 per cent, 12; 20 to 29 per cent, 12; 30 to 39 per cent, 24; 40 to 49 per cent, 4; 50 to 59 per cent, 9; 60 to 69 per cent, 89; 70 to 79 per cent, 40; 80 to 89 per cent, 37; 90 to 99 per cent, 569; 100 per cent, 383.WHERE IT RANKS IN VIRGINIA, Oct 4PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9410 to 191220 to 291230 to 392440 to 49450 to 59960 to 698970 to 794080 to 893790 to 99569100383STATIONS, LOG SCALE
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%383
90 to 99%569
80 to 89%37
70 to 79%40
60 to 69%89
50 to 59%9
40 to 49%4
30 to 39%24
20 to 29%12
10 to 19%12
0 to 9%4

Station report

Citizen station DW9174, in 4 sheets

Drawn from its report of undefined, in the manner of the Field Book, and opened beside the plates that explain each part of it.

1The wind

Contents

Calm.

Plan of the wind at Citizen station DW9174, 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 DW9174FIG. C THE WIND AT CITIZEN STATION DW9174PLAN, 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 FORCE73TITLECitizen station DW9174, the windSTATION REPORT · CWOP DW9174TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-04IDSR-DW9174-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

From the Field Book

2The column

Contents

At 502 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.38 inHg and the temperature at 57.2 F; the station's altimeter setting of 30.20 inHg means its barometer reads 29.66 inHg; it reports 59.0 F, 1.8 F warmer than standard.

Section from sea level of where Citizen station DW9174 stands in the atmosphere, height to scale: the station 502 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.38 inches of mercury, and temperature, 57.2 degrees Fahrenheit; the altimeter setting of 30.20 and the station pressure it means, 29.66.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DW9174FIG. D WHERE CITIZEN STATION DW9174 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION DW91742 PER CENT OF THE AIR BELOW IT502 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.38 inHgSTANDARD TEMPERATURE HERE57.2 FALTIMETER SETTING, REPORTED30.20 inHgITS BAROMETER READS29.66 inHgTEMPERATURE, REPORTED59.0 FTITLECitizen station DW9174, the columnSTATION REPORT · CWOP DW9174TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-04IDSR-DW9174-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

3The sun

Contents

On Oct 4 the noon sun stands 46 degrees above the horizon at 39.27 N, and the day is 11 h 30 min long. Level ground there takes 72 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station DW9174, angles true: on Oct 4 it stands 46 degrees above the horizon, against 74 at the June solstice, 51 at the equinoxes and 27 at the December solstice; the day is 11 h 30 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DW9174FIG. E THE SUN AT CITIZEN STATION DW9174ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 74°EQUINOXES 51°DECEMBER SOLSTICE 27°OCT 4, 46°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 30 MINLEVEL GROUND TAKES 72 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.27 N; THE SUN'S DECLINATION -4.5°TITLECitizen station DW9174, the sunSTATION REPORT · CWOP DW9174TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-04IDSR-DW9174-3DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

4The instrument

Contents

A weather instrument, 502 ft above sea level. Its latest report is written on the sensors that made it.

Elevation of the instrument, Citizen station DW9174, each sensor drawn and labelled with what it read: air temperature, 59.0 f; precipitation gauge, 0.00 in today.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DW9174FIG. F THE INSTRUMENTELEVATION OF THE INSTRUMENT, EACH SENSOR WITH WHAT IT READANTENNA, SENDING BY SATELLITE-AIR TEMPERATURE59.0 FPRECIPITATION GAUGE0.00 IN TODAYSCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLECitizen station DW9174, the instrumentSTATION REPORT · CWOP DW9174TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 4 of 4DATE2026-10-04IDSR-DW9174-4DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

Near Citizen station DW9174

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