Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
IA094
Latitude
40.75312 N
Longitude
92.86176 W
Elevation
879 ft
Rank
831of 1,060 in Iowa, Oct 16
Observed
10:13 PMCDT, 34 minutes ago
Air temperature
52.8F
Dew point
51.2F
Relative humidity
94%

Ranking Statistics

On the radar over SB Copper CreekReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

Beside a road

Drawn as the kind of place it stands at. 95 instruments in Iowa stand at one.

Station charts

SB Copper Creek Report

Rank 831 of 1,060 in Iowa, 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 score84.5of 100

Iowa median
94.7the median score of 1,060 stations
Scoring higher
830stations in Iowa
Sharing its score
2ranks 831 to 832
Points deducted
15.54.8 accuracy, 3.8 arrival, 2.7 reports received, 2.6 continuity, 1.6 forecast check
Counted at the median
Forecast checknot measured at this station; Iowa median 83.8
Next above
PRAI4rank 830; ahead on 247 score 84.8 against 84.5
Next below
GW0743rank 832; behind on reports received 92.2% against 64.8%

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 3592.332.3 of 35 pointsIowa median 99.0465 of 504 scheduled reports received in 7 days
  2. Arrivalweight 1062.16.2 of 10 pointsIowa median 82.9half its reports arrived within 29 min
  3. Continuityweight 1074.07.4 of 10 pointsIowa median 100.0longest silence 2.3 h, on a schedule of one report every 20 min
  4. Accuracyweight 2076.115.2 of 20 pointsIowa median 100.0its temperature against the airport station KTVK, 5.2 miles away, over 372 readings: typical difference 3.6 °F beyond a steady offset of +2.2 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsIowa median 100.00 of 372 readings failed their check against its reference station
  6. Forecast checkweight 10-8.4 of 10 points, at the medianIowa median 83.8-

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 (60 min), none for 72 (24 h)
Accuracy
Full marks within 2.0 °F of its reference, typically, none beyond 8.5 °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
831of 1,060 in Iowa, Oct 16
Days reported, 30 days
0 of 30
Time to reach Storm Station
29 min9 in 10 within 39 min
Against its reference, 30 days
+2.6 °Fwarmer than the airport station KTVK, 5.2 miles away, on average over 685 readings; typical difference 4.2 °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: 465 of 504 scheduled reports received, 92.2%.

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 1,060 ranked stations in Iowa 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, 5; 10 to 19 per cent, 2; 20 to 29 per cent, 12; 30 to 39 per cent, 2; 40 to 49 per cent, 47; 50 to 59 per cent, 72; 60 to 69 per cent, 10; 70 to 79 per cent, 118; 80 to 89 per cent, 80; 90 to 99 per cent, 425; 100 per cent, 287. SB Copper Creek received 92.2 per cent, 465 of 504 scheduled reports, rank 831 of 1,060.WHERE IT RANKS IN IOWA, Oct 16THIS ONE: 92.2%, 465 OF 504, RANK 831 OF 1,060PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9510 to 19220 to 291230 to 39240 to 494750 to 597260 to 691070 to 7911880 to 898090 to 99425100287STATIONS, LOG SCALE
Chart of SB Copper Creek's rank in Iowa by how it reported, day by day, from 2026-10-04 to 2026-10-16: 2026-10-04 rank 1,025 of 1,027; 2026-10-05 rank 1,076 of 1,089; 2026-10-06 rank 1,081 of 1,100; 2026-10-07 rank 1,072 of 1,096; 2026-10-08 rank 1,014 of 1,054; 2026-10-09 rank 878 of 1,051; 2026-10-10 rank 879 of 1,051; 2026-10-11 rank 878 of 1,048; 2026-10-12 rank 875 of 1,040; 2026-10-13 rank 811 of 1,035; 2026-10-14 rank 815 of 1,036; 2026-10-15 rank 820 of 1,038; 2026-10-16 rank 831 of 1,060.ITS RANK IN IOWA, DAY BY DAYRANK, FIRST AT THE TOP15001,0001,500Oct 4Oct 7Oct 10Oct 13Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%287
90 to 99%425
80 to 89%80
70 to 79%118
60 to 69%10
50 to 59%72
40 to 49%47
30 to 39%2
20 to 29%12
10 to 19%2
0 to 9%5
DayRankStations rankedShare received
Oct 16, 20268311,06092.2%
Oct 15, 20268201,03892.8%
Oct 14, 20268151,03691.6%
Oct 13, 20268111,03592.0%
Oct 12, 20268751,04090.2%
Oct 11, 20268781,04889.2%
Oct 10, 20268791,05188.0%
Oct 9, 20268781,05187.8%
Oct 8, 20261,0141,05462.1%
Oct 7, 20261,0721,09649.4%
Oct 6, 20261,0811,10035.9%
Oct 5, 20261,0761,08924.0%
Oct 4, 20261,0251,02711.3%

Station report

SB Copper Creek, 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 879 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.98 inHg and the temperature at 55.9 F.

Section from sea level of where SB Copper Creek stands in the atmosphere, height to scale: the station 879 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 28.98 inches of mercury, and temperature, 55.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IA094FIG. D WHERE SB COPPER CREEK 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 ATMOSPHERESB COPPER CREEK3 PER CENT OF THE AIR BELOW IT879 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 HERE28.98 inHgSTANDARD TEMPERATURE HERE55.9 FTITLESB Copper Creek, the columnSTATION REPORT · RWIS IA094TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-16IDSR-IA094-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 16 the noon sun stands 40 degrees above the horizon at 40.75 N, and the day is 10 h 57 min long. Level ground there takes 64 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at SB Copper Creek, angles true: on Oct 16 it stands 40 degrees above the horizon, against 73 at the June solstice, 49 at the equinoxes and 26 at the December solstice; the day is 10 h 57 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IA094FIG. E THE SUN AT SB COPPER CREEKELEVATION 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 73°EQUINOXES 49°DECEMBER SOLSTICE 26°OCT 16, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 57 MINLEVEL GROUND TAKES 64 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 40.75 N; THE SUN'S DECLINATION -9.1°TITLESB Copper Creek, the sunSTATION REPORT · RWIS IA094TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-IA094-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 879 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, SB Copper Creek, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IA094FIG. 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 SCALETITLESB Copper Creek, the instrumentSTATION REPORT · RWIS IA094TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-16IDSR-IA094-3DRAWN 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

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