Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
SS1920
Latitude
41.02500 N
Longitude
89.41420 W
Elevation
-
Rank
1,032of 1,393 in Illinois, Oct 16
Observed
1:55 AMCDT, 32 minutes ago
Air temperature
53F
Dew point
46F
Relative humidity
78%

Ranking Statistics

On the radar over - 17 @ Illinois RiverReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

Beside a road

Drawn as the kind of place it stands at. 37 instruments in Illinois stand at one.

Station charts

- 17 @ Illinois River Report

Rank 1,032 of 1,393 in Illinois, 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 score88.9of 100

Illinois median
95.9the median score of 1,393 stations
Scoring higher
1,031stations in Illinois
Sharing its score
4ranks 1,032 to 1,035
Points deducted
11.15.0 arrival, 2.8 reports received, 1.9 accuracy, 0.9 continuity, 0.5 forecast check
Counted at the median
Forecast checknot measured at this station; Illinois median 94.7
Next above
IL-KN-140rank 1,031; ahead on 247 score 89.0 against 88.9
Next below
IL-MCH-123rank 1,033; behind on reports received 91.9% against 85.7%

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 3592.032.2 of 35 pointsIllinois median 99.1618 of 672 scheduled reports received in 7 days
  2. Arrivalweight 1050.45.0 of 10 pointsIllinois median 96.3half its reports arrived within 35 min
  3. Continuityweight 1090.99.1 of 10 pointsIllinois median 100.0longest silence 60 min, on a schedule of one report every 15 min
  4. Accuracyweight 2090.418.1 of 20 pointsIllinois median 100.0its temperature against the airport station KC75, 1.3 miles away, over 620 readings: typical difference 2.3 °F beyond a steady offset of +0.3 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 620 readings failed their check against its reference station
  6. Forecast checkweight 10-9.5 of 10 points, at the medianIllinois median 94.7-

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 (45 min), none for 72 (18 h)
Accuracy
Full marks within 1.6 °F of its reference, typically, none beyond 8.1 °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
1,032of 1,393 in Illinois, Oct 16
Days reported, 30 days
0 of 30
Time to reach Storm Station
35 min9 in 10 within 40 min
Against its reference, 30 days
+1.0 °Fwarmer than the airport station KC75, 1.3 miles away, on average over 1,180 readings; typical difference 2.7 °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: 618 of 672 scheduled reports received, 91.9%.

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 1,393 ranked stations in Illinois 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, 2; 10 to 19 per cent, 8; 20 to 29 per cent, 28; 30 to 39 per cent, 5; 40 to 49 per cent, 83; 50 to 59 per cent, 144; 60 to 69 per cent, 25; 70 to 79 per cent, 91; 80 to 89 per cent, 143; 90 to 99 per cent, 339; 100 per cent, 525. - 17 @ Illinois River received 91.9 per cent, 618 of 672 scheduled reports, rank 1,032 of 1,393.WHERE IT RANKS IN ILLINOIS, Oct 16THIS ONE: 91.9%, 618 OF 672, RANK 1,032 OF 1,393PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9210 to 19820 to 292830 to 39540 to 498350 to 5914460 to 692570 to 799180 to 8914390 to 99339100525STATIONS, LOG SCALE
Chart of - 17 @ Illinois River's rank in Illinois by how it reported, day by day, from 2026-10-04 to 2026-10-16: 2026-10-04 rank 1,158 of 1,162; 2026-10-05 rank 1,277 of 1,318; 2026-10-06 rank 1,292 of 1,354; 2026-10-07 rank 1,219 of 1,449; 2026-10-08 rank 1,113 of 1,399; 2026-10-09 rank 839 of 1,364; 2026-10-10 rank 839 of 1,364; 2026-10-11 rank 855 of 1,359; 2026-10-12 rank 972 of 1,354; 2026-10-13 rank 913 of 1,360; 2026-10-14 rank 990 of 1,356; 2026-10-15 rank 1,018 of 1,375; 2026-10-16 rank 1,032 of 1,393.ITS RANK IN ILLINOIS, 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%525
90 to 99%339
80 to 89%143
70 to 79%91
60 to 69%25
50 to 59%144
40 to 49%83
30 to 39%5
20 to 29%28
10 to 19%8
0 to 9%2
DayRankStations rankedShare received
Oct 16, 20261,0321,39391.9%
Oct 15, 20261,0181,37593.0%
Oct 14, 20269901,35693.7%
Oct 13, 20269131,36094.9%
Oct 12, 20269721,35494.3%
Oct 11, 20268551,35995.3%
Oct 10, 20268391,36493.7%
Oct 9, 20268391,36493.3%
Oct 8, 20261,1131,39966.6%
Oct 7, 20261,2191,44953.4%
Oct 6, 20261,2921,35440.0%
Oct 5, 20261,2771,31826.4%
Oct 4, 20261,1581,16212.2%

Station report

- 17 @ Illinois River, in 2 sheets

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

1The sun

Contents

On Oct 16 the noon sun stands 40 degrees above the horizon at 41.02 N, and the day is 10 h 56 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 - 17 @ Illinois River, angles true: on Oct 16 it stands 40 degrees above the horizon, against 72 at the June solstice, 49 at the equinoxes and 26 at the December solstice; the day is 10 h 56 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS1920FIG. E THE SUN AT - 17 @ ILLINOIS RIVERELEVATION 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 72°EQUINOXES 49°DECEMBER SOLSTICE 26°OCT 16, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 56 MINLEVEL GROUND TAKES 64 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 41.02 N; THE SUN'S DECLINATION -9.1°TITLE- 17 @ Illinois River, the sunSTATION REPORT · RWIS SS1920TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-16IDSR-SS1920-1DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

2The instrument

Contents

A road weather station. Its sensors, as its network builds them.

Elevation of a road weather station, - 17 @ Illinois River, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS1920FIG. 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 SCALETITLE- 17 @ Illinois River, the instrumentSTATION REPORT · RWIS SS1920TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-16IDSR-SS1920-2DRAWN 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 - 17 @ Illinois River

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Weather instruments

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