Grand River at Lansing

Ranking Statistics

247 score86.3of 100

Michigan median

95.5the median score of 979 stations

Scoring higher

713stations in Michigan

Sharing its score

1no other station

Points deducted

13.710.0 arrival, 2.9 reports received, 0.8 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Michigan median 100.0, 100.0, 92.3

Next above

BCRM4rank 713; ahead on 247 score 86.5 against 86.3

Next below

WN8IZVrank 715; behind on 247 score 86.3 against 85.8

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 3591.732.1 of 35 pointsMichigan median 98.2154 of 168 scheduled reports received in 7 days
2. Arrivalweight 100.00.0 of 10 pointsMichigan median 96.9half its reports arrived within 72 min
3. Continuityweight 10100.010.0 of 10 pointsMichigan median 100.0longest silence 2.1 h, on a schedule of one report every 60 min
4. Accuracyweight 20-20.0 of 20 points, at the medianMichigan median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianMichigan median 100.0-
6. Forecast checkweight 10-9.2 of 10 points, at the medianMichigan median 92.3-

The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.