Drawn as the kind of place it stands at. 137 instruments in Illinois stand at one.
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Station charts
Rain Gage At West Pullman At Chicago Report
Rank 943 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 score91.2of 100
Illinois median
95.9the median score of 1,393 stations
Scoring higher
942stations in Illinois
Sharing its score
5ranks 943 to 947
Points deducted
8.86.5 arrival, 1.6 accuracy, 0.5 forecast check, 0.2 reports received
Counted at the median
Forecast checknot measured at this station; Illinois median 94.7
SKOI2rank 944; behind on reports received 99.4% against 98.2%
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.
Reports receivedweight 3599.434.8 of 35 pointsIllinois median 99.1334 of 336 scheduled reports received in 7 days
Arrivalweight 1035.53.6 of 10 pointsIllinois median 96.3half its reports arrived within 42 min
Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 62 min, on a schedule of one report every 30 min
Accuracyweight 2091.818.4 of 20 pointsIllinois median 100.0its temperature against the airport station KMDW, 9.5 miles away, over 330 readings: typical difference 3.0 °F beyond a steady offset of -1.1 °F
Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 330 readings failed their check against its reference station
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 (1.5 h), none for 72 (36 h)
Accuracy
Full marks within 2.5 °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
-1.2 °Fcooler than the airport station KMDW, 9.5 miles away, on average over 490 readings; typical difference 3.3 °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 30 min, 48 in 24 hours. Two reports in the same 30 min count as one received.
The ranking these charts were drawn from, as tables
Share of scheduled reports received
Stations
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
Day
Rank
Stations ranked
Share received
Oct 16, 2026
943
1,393
99.4%
Oct 15, 2026
946
1,375
99.1%
Oct 14, 2026
890
1,356
99.4%
Oct 13, 2026
884
1,360
99.4%
Oct 12, 2026
1,009
1,354
85.7%
Oct 11, 2026
1,108
1,359
71.4%
Oct 10, 2026
1,231
1,364
57.1%
Oct 9, 2026
1,235
1,364
56.8%
Oct 8, 2026
1,351
1,399
28.8%
Oct 7, 2026
1,429
1,449
14.5%
Station report
Rain Gage At West Pullman At Chicago, 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 16 the noon sun stands 39 degrees above the horizon at 41.67 N, and the day is 10 h 55 min long. Level ground there takes 63 per cent of the noon sunlight a surface facing the sun would.