River Raisin at Grape

Ranking Statistics

247 score98.4of 100

Michigan median

95.5the median score of 979 stations

Scoring higher

279stations in Michigan

Sharing its score

4ranks 280 to 283

Points deducted

1.60.8 forecast check, 0.6 arrival, 0.2 reports received

Counted at the median

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

Next above

CADrank 281; ahead on reports received 99.8% against 99.4%

Next below

ELNM4rank 283; behind on median arrival 12 min 50 s against 12 min 58 s

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 pointsMichigan median 98.2167 of 168 scheduled reports received in 7 days
2. Arrivalweight 1094.39.4 of 10 pointsMichigan median 96.9half its reports arrived within 13 min
3. Continuityweight 10100.010.0 of 10 pointsMichigan 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 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.