Storm Station
Sign in

Beside a road

RWIS network, identified by the register

Identifier
CF138
Latitude
37.70719 N
Longitude
121.51496 W
Elevation
255 ft
Rank
3,329of 4,465 in California, Oct 16
Observed
12:00 AMPDT, 21 minutes ago
Air temperature
71.8F
Dew point
35F
Relative humidity
26%
Visibility
12.4mi
Wind
4mph
Gust
7mph
Wind direction
330°

Ranking Statistics

On the radar over I-580 - Hansen RoadReflectivityStorm 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

I-580 - Hansen Road Report

Rank 3,329 of 4,465 in California, Oct 16. 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.

Ranking Statistics

247 score82.5of 100

California median
91.6the median score of 4,465 stations
Scoring higher
3,326stations in California
Sharing its score
5ranks 3,327 to 3,331
Points deducted
17.59.8 reports received, 4.6 continuity, 1.4 accuracy, 1.0 arrival, 0.8 forecast check
Counted at the median
Forecast checknot measured at this station; California median 92.4
Next above
CF005rank 3,328; ahead on reports received 89.4% against 72.1%
Next below
CF108rank 3,330; behind on reports received 72.1% against 68.0%

Equal scores are ordered by the share of scheduled reports received, then the reports due in the week (the longer record first), then the median arrival, then the longest silence.

  1. Reports receivedweight 3572.125.2 of 35 pointsCalifornia median 98.5727 of 1,008 scheduled reports received in 7 days
  2. Arrivalweight 1090.49.0 of 10 pointsCalifornia median 81.2half its reports arrived within 15 min
  3. Continuityweight 1053.95.4 of 10 pointsCalifornia median 100.0longest silence 2.2 h, on a schedule of one report every 10 min
  4. Accuracyweight 2092.918.6 of 20 pointsCalifornia median 85.6its temperature against the airport station KTCY, 4.0 miles away, over 704 readings: typical difference 2.4 °F beyond a steady offset of -0.7 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsCalifornia median 100.00 of 704 readings failed their check against its reference station
  6. Forecast checkweight 10-9.2 of 10 points, at the medianCalifornia median 92.4-

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

How each part is scored
Reports received
Full marks for every scheduled report received, none for none, in proportion between
Arrival
Full marks for a median arrival within 10 min, none at 60 min
Continuity
Full marks for a longest silence of 3 reports or less (30 min), none for 72 (12 h)
Accuracy
Full marks within 1.9 °F of its reference, typically, none beyond 8.4 °F
Instrument checks
Full marks for no reading failed, none for 5 per cent or more
Forecast check
Full marks within 2 °F of the forecast on average, none at 8 °F
Rank
3,329of 4,465 in California, Oct 16
Days reported, 30 days
0 of 30
Time to reach Storm Station
15 min9 in 10 within 24 min
Against its reference, 30 days
-0.1 °Fcooler than the airport station KTCY, 4.0 miles away, on average over 1,326 readings; typical difference 2.4 °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: 727 of 1,008 scheduled reports received, 72.1%.

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 4,465 ranked stations in California on Oct 16 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, 78; 10 to 19 per cent, 83; 20 to 29 per cent, 45; 30 to 39 per cent, 22; 40 to 49 per cent, 118; 50 to 59 per cent, 285; 60 to 69 per cent, 120; 70 to 79 per cent, 209; 80 to 89 per cent, 391; 90 to 99 per cent, 2,034; 100 per cent, 1,080. I-580 - Hansen Road received 72.1 per cent, 727 of 1,008 scheduled reports, rank 3,329 of 4,465.WHERE IT RANKS IN CALIFORNIA, Oct 16THIS ONE: 72.1%, 727 OF 1,008, RANK 3,329 OF 4,465PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101001,0000 to 97810 to 198320 to 294530 to 392240 to 4911850 to 5928560 to 6912070 to 7920980 to 8939190 to 992,0341001,080STATIONS, LOG SCALE
Chart of I-580 - Hansen Road's rank in California by how it reported, day by day, from 2026-10-04 to 2026-10-16: 2026-10-04 rank 3,913 of 4,072; 2026-10-05 rank 4,102 of 4,333; 2026-10-06 rank 4,073 of 4,362; 2026-10-07 rank 4,037 of 4,381; 2026-10-08 rank 3,995 of 4,405; 2026-10-09 rank 3,574 of 4,400; 2026-10-10 rank 3,578 of 4,400; 2026-10-11 rank 3,633 of 4,428; 2026-10-12 rank 3,626 of 4,446; 2026-10-13 rank 3,669 of 4,464; 2026-10-14 rank 3,733 of 4,466; 2026-10-15 rank 3,500 of 4,462; 2026-10-16 rank 3,329 of 4,465.ITS RANK IN CALIFORNIA, DAY BY DAYRANK, FIRST AT THE TOP12,0004,0006,000Oct 4Oct 7Oct 10Oct 13Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%1,080
90 to 99%2,034
80 to 89%391
70 to 79%209
60 to 69%120
50 to 59%285
40 to 49%118
30 to 39%22
20 to 29%45
10 to 19%83
0 to 9%78
DayRankStations rankedShare received
Oct 16, 20263,3294,46572.1%
Oct 15, 20263,5004,46271.3%
Oct 14, 20263,7334,46670.0%
Oct 13, 20263,6694,46470.9%
Oct 12, 20263,6264,44670.4%
Oct 11, 20263,6334,42871.0%
Oct 10, 20263,5784,40069.7%
Oct 9, 20263,5744,40069.3%
Oct 8, 20263,9954,40549.3%
Oct 7, 20264,0374,38139.7%
Oct 6, 20264,0734,36229.7%
Oct 5, 20264,1024,33319.3%
Oct 4, 20263,9134,0728.7%

Station report

I-580 - Hansen Road, 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 255 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.65 inHg and the temperature at 58.1 F.

Section from sea level of where I-580 - Hansen Road stands in the atmosphere, height to scale: the station 255 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.65 inches of mercury, and temperature, 58.1 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF138FIG. D WHERE I-580 - HANSEN ROAD 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 ATMOSPHEREI-580 - HANSEN ROAD1 PER CENT OF THE AIR BELOW IT255 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 HERE29.65 inHgSTANDARD TEMPERATURE HERE58.1 FTITLEI-580 - Hansen Road, the columnSTATION REPORT · RWIS CF138TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-16IDSR-CF138-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 16 the noon sun stands 43 degrees above the horizon at 37.71 N, and the day is 11 h 03 min long. Level ground there takes 68 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at I-580 - Hansen Road, angles true: on Oct 16 it stands 43 degrees above the horizon, against 76 at the June solstice, 52 at the equinoxes and 29 at the December solstice; the day is 11 h 03 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF138FIG. E THE SUN AT I-580 - HANSEN ROADELEVATION 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 76°EQUINOXES 52°DECEMBER SOLSTICE 29°OCT 16, 43°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 03 MINLEVEL GROUND TAKES 68 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 37.71 N; THE SUN'S DECLINATION -9.1°TITLEI-580 - Hansen Road, the sunSTATION REPORT · RWIS CF138TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-CF138-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 255 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, I-580 - Hansen Road, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF138FIG. 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 SCALETITLEI-580 - Hansen Road, the instrumentSTATION REPORT · RWIS CF138TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-16IDSR-CF138-3DRAWN 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 I-580 - Hansen Road

Gauges

Weather instruments

Places