Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
SS0110
Latitude
38.88690 N
Longitude
90.17280 W
Elevation
-
Rank
1,052of 1,393 in Illinois, Oct 16
Observed
1:55 AMCDT, 43 minutes ago
Road surface
dry
Air temperature
56F
Dew point
51F
Relative humidity
81%
Pavement temperature
60F

Ranking Statistics

On the radar over US-67 @ Clark BridgeReflectivityStorm 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

US-67 @ Clark Bridge Report

Rank 1,052 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 score87.7of 100

Illinois median
95.9the median score of 1,393 stations
Scoring higher
1,051stations in Illinois
Sharing its score
2ranks 1,052 to 1,053
Points deducted
12.35.0 arrival, 3.2 accuracy, 2.8 reports received, 0.9 continuity, 0.5 forecast check
Counted at the median
Forecast checknot measured at this station; Illinois median 94.7
Next above
420121087523201rank 1,051; ahead on 247 score 87.8 against 87.7
Next below
SS0111rank 1,053; behind on reports received 92.1% against 91.2%

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 3592.132.2 of 35 pointsIllinois median 99.1619 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 2084.116.8 of 20 pointsIllinois median 100.0its temperature against the airport station KALN, 7.6 miles away, over 640 readings: typical difference 3.3 °F beyond a steady offset of +1.7 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 640 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 2.3 °F of its reference, typically, none beyond 8.8 °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
1,052of 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
+2.3 °Fwarmer than the airport station KALN, 7.6 miles away, on average over 1,183 readings; typical difference 4.2 °F; also compared with 2 other reference stations

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: 619 of 672 scheduled reports received, 92.1%.

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 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. US-67 @ Clark Bridge received 92.1 per cent, 619 of 672 scheduled reports, rank 1,052 of 1,393.WHERE IT RANKS IN ILLINOIS, Oct 16THIS ONE: 92.1%, 619 OF 672, RANK 1,052 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 US-67 @ Clark Bridge's rank in Illinois by how it reported, day by day, from 2026-10-04 to 2026-10-16: 2026-10-04 rank 1,128 of 1,162; 2026-10-05 rank 1,276 of 1,318; 2026-10-06 rank 1,293 of 1,354; 2026-10-07 rank 1,268 of 1,449; 2026-10-08 rank 1,149 of 1,399; 2026-10-09 rank 904 of 1,364; 2026-10-10 rank 899 of 1,364; 2026-10-11 rank 941 of 1,359; 2026-10-12 rank 993 of 1,354; 2026-10-13 rank 996 of 1,360; 2026-10-14 rank 1,010 of 1,356; 2026-10-15 rank 1,036 of 1,375; 2026-10-16 rank 1,052 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, 20261,0521,39392.1%
Oct 15, 20261,0361,37593.1%
Oct 14, 20261,0101,35693.7%
Oct 13, 20269961,36094.7%
Oct 12, 20269931,35494.1%
Oct 11, 20269411,35995.2%
Oct 10, 20268991,36493.6%
Oct 9, 20269041,36493.1%
Oct 8, 20261,1491,39966.5%
Oct 7, 20261,2681,44953.4%
Oct 6, 20261,2931,35440.0%
Oct 5, 20261,2761,31826.4%
Oct 4, 20261,1281,16212.2%

Station report

US-67 @ Clark Bridge, 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 42 degrees above the horizon at 38.89 N, and the day is 11 h 01 min long. Level ground there takes 67 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at US-67 @ Clark Bridge, angles true: on Oct 16 it stands 42 degrees above the horizon, against 75 at the June solstice, 51 at the equinoxes and 28 at the December solstice; the day is 11 h 01 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS0110FIG. E THE SUN AT US-67 @ CLARK BRIDGEELEVATION 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 75°EQUINOXES 51°DECEMBER SOLSTICE 28°OCT 16, 42°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 01 MINLEVEL GROUND TAKES 67 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 38.89 N; THE SUN'S DECLINATION -9.1°TITLEUS-67 @ Clark Bridge, the sunSTATION REPORT · RWIS SS0110TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-16IDSR-SS0110-1DRAWN 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, US-67 @ Clark Bridge, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS0110FIG. 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 SCALETITLEUS-67 @ Clark Bridge, the instrumentSTATION REPORT · RWIS SS0110TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-16IDSR-SS0110-2DRAWN 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 US-67 @ Clark Bridge

Gauges

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