Storm Station

In a volunteer observer's own ground

CWOP network, identified by the register

Identifier
EW9947
Latitude
39.24000 N
Longitude
121.01000 W
Elevation
3,172 ft
Rank
3,373of 4,362 in California, Oct 6
Air temperature
78F
Relative humidity
29%
Pressure
29.84inHg
Wind
0mph
Gust
0mph
Wind direction
200°
Precipitation this hour
0in
Precipitation today
0in

On the radar over Citizen station EW9947ReflectivityStorm 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. 1,788 instruments in California stand at one.

Station charts

Citizen station EW9947 Report

Rank 3,373 of 4,362 in California, Oct 6. The 247 rank orders a state's stations by their 247 score out of 100: how reliably they report, how accurate their readings are against a reference station, how their readings pass their checks, and how they stand against the forecast.

247 score83.8of 100

  1. Reports receivedweight 3566.714 of 21 scheduled reports received in 7 days
  2. Arrivalweight 10100.0half its reports arrived within 13 s
  3. Continuityweight 1095.2longest silence 7 h, on a schedule of one report every 2 h
  4. Accuracyweight 20--
  5. Instrument checksweight 15--
  6. Forecast checkweight 10--

The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.

Rank
3,373of 4,362 in California, Oct 6
Time to reach Storm Station
18 s9 in 10 within 31 s
Against its reference, 30 days
+0.4 °Fwarmer than the airport station KGOO, 1.2 miles away, on average over 30 readings; typical difference 1.8 °F

The reports received are counted from the network's own archive of this station's reports. Its 247 rank is counted from Storm Station's own record, which holds less than 7 days of it so far: 14 of 21 scheduled reports received, 66.6%.

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 4,362 ranked stations in California on Oct 6 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, 19; 10 to 19 per cent, 48; 20 to 29 per cent, 74; 30 to 39 per cent, 71; 40 to 49 per cent, 126; 50 to 59 per cent, 160; 60 to 69 per cent, 147; 70 to 79 per cent, 120; 80 to 89 per cent, 315; 90 to 99 per cent, 2,265; 100 per cent, 1,017. Citizen station EW9947 received 66.6 per cent, 14 of 21 scheduled reports, rank 3,373 of 4,362.WHERE IT RANKS IN CALIFORNIA, Oct 6THIS ONE: 66.6%, 14 OF 21, RANK 3,373 OF 4,362PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101001,0000 to 91910 to 194820 to 297430 to 397140 to 4912650 to 5916060 to 6914770 to 7912080 to 8931590 to 992,2651001,017STATIONS, LOG SCALE
Chart of Citizen station EW9947's rank in California by how it reported, day by day, from 2026-10-05 to 2026-10-06: 2026-10-05 rank 3,469 of 4,333; 2026-10-06 rank 3,373 of 4,362.ITS RANK IN CALIFORNIA, DAY BY DAYRANK, FIRST AT THE TOP11,0002,0003,0004,000Oct 5Oct 6
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%1,017
90 to 99%2,265
80 to 89%315
70 to 79%120
60 to 69%147
50 to 59%160
40 to 49%126
30 to 39%71
20 to 29%74
10 to 19%48
0 to 9%19
DayRankStations rankedShare received
Oct 6, 20263,3734,36266.6%
Oct 5, 20263,4694,33361.5%

Station report

Citizen station EW9947, 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 EW9947, 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 EW9947FIG. C THE WIND AT CITIZEN STATION EW9947PLAN, 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 EW9947, the windSTATION REPORT · CWOP EW9947TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-06IDSR-EW9947-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

From the Field Book

2The column

Contents

At 3,172 ft above sea level, 11 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.65 inHg and the temperature at 47.7 F; the station's altimeter setting of 29.84 inHg means its barometer reads 26.57 inHg; it reports 78.0 F, 30.3 F warmer than standard.

Section from sea level of where Citizen station EW9947 stands in the atmosphere, height to scale: the station 3,172 feet above sea level with 11 per cent of the air below it; the standard atmosphere's pressure there, 26.65 inches of mercury, and temperature, 47.7 degrees Fahrenheit; the altimeter setting of 29.84 and the station pressure it means, 26.57.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW9947FIG. D WHERE CITIZEN STATION EW9947 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 EW994711 PER CENT OF THE AIR BELOW IT3,172 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 HERE26.65 inHgSTANDARD TEMPERATURE HERE47.7 FALTIMETER SETTING, REPORTED29.84 inHgITS BAROMETER READS26.57 inHgTEMPERATURE, REPORTED78.0 FTITLECitizen station EW9947, the columnSTATION REPORT · CWOP EW9947TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-06IDSR-EW9947-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

3The sun

Contents

On Oct 6 the noon sun stands 45 degrees above the horizon at 39.24 N, and the day is 11 h 25 min long. Level ground there takes 71 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station EW9947, angles true: on Oct 6 it stands 45 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 25 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW9947FIG. E THE SUN AT CITIZEN STATION EW9947ELEVATION 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 6, 45°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 25 MINLEVEL GROUND TAKES 71 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.24 N; THE SUN'S DECLINATION -5.4°TITLECitizen station EW9947, the sunSTATION REPORT · CWOP EW9947TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-06IDSR-EW9947-3DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

4The instrument

Contents

A weather instrument, 3,172 ft above sea level. Its latest report is written on the sensors that made it.

Elevation of the instrument, Citizen station EW9947, each sensor drawn and labelled with what it read: air temperature, 78.0 f; precipitation gauge, 0.00 in today.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW9947FIG. F THE INSTRUMENTELEVATION OF THE INSTRUMENT, EACH SENSOR WITH WHAT IT READANTENNA, SENDING BY SATELLITE-AIR TEMPERATURE78.0 FPRECIPITATION GAUGE0.00 IN TODAYSCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLECitizen station EW9947, the instrumentSTATION REPORT · CWOP EW9947TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 4 of 4DATE2026-10-06IDSR-EW9947-4DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

Near Citizen station EW9947

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