Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
SS0305
Latitude
39.48390 N
Longitude
88.32170 W
Elevation
-
Rank
1,023of 1,393 in Illinois, Oct 16
Observed
11:55 PMCDT, 37 minutes ago
Air temperature
63F
Dew point
63F
Relative humidity
100%
Pavement temperature
66F

Ranking Statistics

On the radar over I-57 @ IL-16 MattoonReflectivityStorm 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

I-57 @ IL-16 Mattoon Report

Rank 1,023 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 score89.0of 100

Illinois median
95.9the median score of 1,393 stations
Scoring higher
1,022stations in Illinois
Sharing its score
9ranks 1,023 to 1,031
Points deducted
11.05.0 arrival, 2.8 reports received, 1.8 accuracy, 0.9 continuity, 0.5 forecast check
Counted at the median
Forecast checknot measured at this station; Illinois median 94.7
Next above
SPNI2rank 1,022; ahead on 247 score 89.2 against 89.0
Next below
420910087490701rank 1,024; behind on reports received 92.1% against 74.2%

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 2090.818.2 of 20 pointsIllinois median 100.0its temperature against the airport station KMTO, 2.7 miles away, over 533 readings: typical difference 2.4 °F beyond a steady offset of +0.8 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 533 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 1.8 °F of its reference, typically, none beyond 8.3 °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
1,023of 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
+1.1 °Fwarmer than the airport station KMTO, 2.7 miles away, on average over 1,042 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: 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. I-57 @ IL-16 Mattoon received 92.1 per cent, 619 of 672 scheduled reports, rank 1,023 of 1,393.WHERE IT RANKS IN ILLINOIS, Oct 16THIS ONE: 92.1%, 619 OF 672, RANK 1,023 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 I-57 @ IL-16 Mattoon's rank in Illinois by how it reported, day by day, from 2026-10-04 to 2026-10-16: 2026-10-04 rank 1,155 of 1,162; 2026-10-05 rank 1,280 of 1,318; 2026-10-06 rank 1,295 of 1,354; 2026-10-07 rank 1,222 of 1,449; 2026-10-08 rank 1,104 of 1,399; 2026-10-09 rank 884 of 1,364; 2026-10-10 rank 883 of 1,364; 2026-10-11 rank 848 of 1,359; 2026-10-12 rank 903 of 1,354; 2026-10-13 rank 903 of 1,360; 2026-10-14 rank 976 of 1,356; 2026-10-15 rank 1,009 of 1,375; 2026-10-16 rank 1,023 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, 20261,0231,39392.1%
Oct 15, 20261,0091,37593.1%
Oct 14, 20269761,35693.8%
Oct 13, 20269031,36094.9%
Oct 12, 20269031,35494.3%
Oct 11, 20268481,35995.3%
Oct 10, 20268831,36493.7%
Oct 9, 20268841,36493.3%
Oct 8, 20261,1041,39966.6%
Oct 7, 20261,2221,44953.4%
Oct 6, 20261,2951,35440.0%
Oct 5, 20261,2801,31826.4%
Oct 4, 20261,1551,16212.2%

Station report

I-57 @ IL-16 Mattoon, 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 41 degrees above the horizon at 39.48 N, and the day is 10 h 59 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at I-57 @ IL-16 Mattoon, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 51 at the equinoxes and 27 at the December solstice; the day is 10 h 59 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS0305FIG. E THE SUN AT I-57 @ IL-16 MATTOONELEVATION 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 74°EQUINOXES 51°DECEMBER SOLSTICE 27°OCT 16, 41°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 59 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.48 N; THE SUN'S DECLINATION -9.1°TITLEI-57 @ IL-16 Mattoon, the sunSTATION REPORT · RWIS SS0305TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-16IDSR-SS0305-1DRAWN 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, I-57 @ IL-16 Mattoon, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SS0305FIG. 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-57 @ IL-16 Mattoon, the instrumentSTATION REPORT · RWIS SS0305TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-16IDSR-SS0305-2DRAWN 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

What this instrument measures for

1 place reads it as one of the nearest to it.

Near I-57 @ IL-16 Mattoon

Gauges

Weather instruments

Places