Storm Station

Beside a road

RWIS network, identified by the register

Identifier
CF006
Latitude
35.12539 N
Longitude
118.41069 W
Elevation
4,071 ft
Rank
3,939of 4,072 in California, Oct 4
Air temperature
58.6F
Dew point
36.2F
Relative humidity
43%
Wind
4mph
Gust
4mph
Wind direction
61°

On the radar over SR-58 - Tehachapi SummitReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

Beside a road

Drawn as the kind of place it stands at. 136 instruments in California stand at one.

Station charts

SR-58 - Tehachapi Summit Report

Rank 3,939 of 4,072 in California, Oct 4. 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 score60.9of 100

  1. Reports receivedweight 3511.376 of 672 scheduled reports received in 7 days
  2. Arrivalweight 1081.7half its reports arrived within 19 min
  3. Continuityweight 1069.1longest silence 2 h, on a schedule of one report every 15 min
  4. Accuracyweight 2087.2its temperature against the airport station KTSP, 2.0 miles away, over 75 readings: typical difference 2.5 °F beyond a steady offset of +1.5 °F
  5. Instrument checksweight 15100.00 of 75 readings failed their check against its reference station
  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
3,939of 4,072 in California, Oct 4
Days reported, 30 days
0 of 30
Time to reach Storm Station
19 min9 in 10 within 24 min
Against its reference, 30 days
+2.1 °Fwarmer than the airport station KTSP, 2.0 miles away, on average over 122 readings; typical difference 3.2 °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: 76 of 672 scheduled reports received, 11.3%.

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 4,072 ranked stations in California 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, 86; 10 to 19 per cent, 52; 20 to 29 per cent, 8; 30 to 39 per cent, 43; 40 to 49 per cent, 36; 50 to 59 per cent, 54; 60 to 69 per cent, 151; 70 to 79 per cent, 116; 80 to 89 per cent, 218; 90 to 99 per cent, 2,244; 100 per cent, 1,064. SR-58 - Tehachapi Summit received 11.3 per cent, 76 of 672 scheduled reports, rank 3,939 of 4,072.WHERE IT RANKS IN CALIFORNIA, Oct 4THIS ONE: 11.3%, 76 OF 672, RANK 3,939 OF 4,072PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101001,0000 to 98610 to 195220 to 29830 to 394340 to 493650 to 595460 to 6915170 to 7911680 to 8921890 to 992,2441001,064STATIONS, LOG SCALE
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%1,064
90 to 99%2,244
80 to 89%218
70 to 79%116
60 to 69%151
50 to 59%54
40 to 49%36
30 to 39%43
20 to 29%8
10 to 19%52
0 to 9%86

Station report

SR-58 - Tehachapi Summit, in 3 sheets

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

1The column

Contents

At 4,071 ft above sea level, 14 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.77 inHg and the temperature at 44.5 F.

Section from sea level of where SR-58 - Tehachapi Summit stands in the atmosphere, height to scale: the station 4,071 feet above sea level with 14 per cent of the air below it; the standard atmosphere's pressure there, 25.77 inches of mercury, and temperature, 44.5 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF006FIG. D WHERE SR-58 - TEHACHAPI SUMMIT 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 ATMOSPHERESR-58 - TEHACHAPI SUMMIT14 PER CENT OF THE AIR BELOW IT4,071 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 HERE25.77 inHgSTANDARD TEMPERATURE HERE44.5 FTITLESR-58 - Tehachapi Summit, the columnSTATION REPORT · RWIS CF006TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-04IDSR-CF006-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 4 the noon sun stands 50 degrees above the horizon at 35.13 N, and the day is 11 h 34 min long. Level ground there takes 77 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at SR-58 - Tehachapi Summit, angles true: on Oct 4 it stands 50 degrees above the horizon, against 78 at the June solstice, 55 at the equinoxes and 31 at the December solstice; the day is 11 h 34 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF006FIG. E THE SUN AT SR-58 - TEHACHAPI SUMMITELEVATION 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 78°EQUINOXES 55°DECEMBER SOLSTICE 31°OCT 4, 50°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 34 MINLEVEL GROUND TAKES 77 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 35.13 N; THE SUN'S DECLINATION -4.6°TITLESR-58 - Tehachapi Summit, the sunSTATION REPORT · RWIS CF006TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-04IDSR-CF006-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 4,071 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, SR-58 - Tehachapi Summit, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF006FIG. F THE INSTRUMENTELEVATION OF A ROAD WEATHER STATION, EACH SENSOR WITH WHAT IT READTHE ROAD, IN SECTIONPAVEMENT SENSOR, SET IN THE ROAD-PROBE UNDER THE ROAD-AIR TEMPERATURE ON THE TOWER-WIND AT THE TOP OF THE TOWER-SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLESR-58 - Tehachapi Summit, the instrumentSTATION REPORT · RWIS CF006TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-04IDSR-CF006-3DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

The instrumentWhat an instrument is FB-INS-001Stevenson screen and siting FB-INS-009

What it seesLapse rates and stability FB-ENG-005Water vapour as a gas FB-ENG-011Blizzard FB-EVT-081Ice storm FB-EVT-084Heat wave and heat dome FB-EVT-130Fire weather FB-EVT-139High wind FB-EVT-150Humidity variables FB-WAT-002Fog types FB-WAT-020

Near SR-58 - Tehachapi Summit

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