Grand River AT Ionia

Ranking Statistics

247 score97.6of 100

Michigan median

95.4the median score of 1,000 stations

Scoring higher

326stations in Michigan

Sharing its score

15ranks 327 to 341

Points deducted

2.41.6 arrival, 0.8 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Michigan median 100.0, 100.0, 91.6

Next above

Y70rank 326; ahead on 247 score 97.7 against 97.6

Next below

PAUM4rank 336; behind on median arrival 17 min 51 s against 17 min 52 s

Sharing its rank

8other 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 pointsMichigan median 98.8168 of 168 scheduled reports received in 7 days
2. Arrivalweight 1084.38.4 of 10 pointsMichigan median 98.0half its reports arrived within 18 min
3. Continuityweight 10100.010.0 of 10 pointsMichigan median 100.0longest silence 60 min, 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 91.6-

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