N Br Chicago River AT Niles

Ranking Statistics

247 score96.0of 100

Illinois median

95.9the median score of 1,393 stations

Scoring higher

674stations in Illinois

Sharing its score

9ranks 675 to 683

Points deducted

4.03.2 arrival, 0.5 forecast check, 0.2 reports received

Counted at the median

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

Next above

QLDI2rank 679; ahead on reports due 336 against 168, the longer record first

Next below

RLLI2rank 683; behind on median arrival 26 min 6 s against 26 min 7 s

Sharing its rank

2other 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 3599.434.8 of 35 pointsIllinois median 99.1167 of 168 scheduled reports received in 7 days
2. Arrivalweight 1067.86.8 of 10 pointsIllinois median 96.3half its reports arrived within 26 min
3. Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 2 h, on a schedule of one report every 60 min
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.