Chicago OHare

Ranking Statistics

247 score99.5of 100

Illinois median

95.9the median score of 1,393 stations

Scoring higher

11stations in Illinois

Sharing its score

319ranks 12 to 330

Points deducted

0.50.5 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Illinois median 100.0, 100.0, 94.7

Next above

LOTI2rank 27; ahead on median arrival 7 min 58 s against 8 min

Next below

RANI2rank 30; behind on reports due 28 against 7, the longer record first

Sharing its rank

1other stations, equal on every measure

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 35100.035.0 of 35 pointsIllinois median 99.128 of 28 scheduled reports received in 7 days
2. Arrivalweight 10100.010.0 of 10 pointsIllinois median 96.3half its reports arrived within 8 min
3. Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 6.1 h, on a schedule of one report every 6 h
4. Accuracyweight 20-20.0 of 20 points, at the medianIllinois median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianIllinois median 100.0-
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.