Drawn as the kind of place it stands at. 137 instruments in Illinois stand at one.
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Every instrument in this state
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Snow on the ground
Station charts
Weather Station At Cssc Nr Lemont Report
Rank 1,079 of 1,359 in Illinois, Oct 11. 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.
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.
Reports receivedweight 3571.425.0 of 35 pointsIllinois median 96.1120 of 168 scheduled reports received in 7 days
Arrivalweight 1034.43.4 of 10 pointsIllinois median 94.4half its reports arrived within 43 min
Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 2 h, on a schedule of one report every 60 min
Accuracyweight 20100.020.0 of 20 pointsIllinois median 97.8its temperature against the airport station KLOT, 9.4 miles away, over 120 readings: typical difference 2.4 °F beyond a steady offset of -0.8 °F
Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 120 readings failed their check against its reference station
Forecast checkweight 10-9.7 of 10 points, at the medianIllinois median 97.0-
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 (3 h), none for 72 (72 h)
Accuracy
Full marks within 2.4 °F of its reference, typically, none beyond 8.9 °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
-0.6 °Fcooler than the airport station KLOT, 9.4 miles away, on average over 126 readings; typical difference 2.5 °F; also compared with 1 other reference station
From Storm Station's own record of every report it heard from this station.
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.
Its schedule is one report every hour, 24 in 24 hours. Two reports in the same hour count as one received.
The ranking these charts were drawn from, as tables
Share of scheduled reports received
Stations
100%
365
90 to 99%
372
80 to 89%
156
70 to 79%
172
60 to 69%
14
50 to 59%
161
40 to 49%
68
30 to 39%
11
20 to 29%
8
10 to 19%
30
0 to 9%
2
Day
Rank
Stations ranked
Share received
Oct 11, 2026
1,079
1,359
71.4%
Oct 10, 2026
1,197
1,364
57.1%
Oct 9, 2026
1,209
1,364
56.5%
Oct 8, 2026
1,347
1,399
29.1%
Oct 7, 2026
1,403
1,449
14.8%
Station report
Weather Station At Cssc Nr Lemont, 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.
On Oct 11 the noon sun stands 41 degrees above the horizon at 41.69 N, and the day is 11 h 08 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.