Chatham 1 SE

Ranking Statistics

247 score88.8of 100

Michigan median

95.5the median score of 979 stations

Scoring higher

685stations in Michigan

Sharing its score

3ranks 686 to 688

Points deducted

11.210.0 arrival, 0.8 forecast check, 0.4 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

54854rank 686; ahead on median arrival 150 min 35 s against 150 min 38 s

Next below

NDBC-GRMM4rank 688; behind on reports received 98.8% against 83.9%

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 3598.834.6 of 35 pointsMichigan median 98.283 of 84 scheduled reports received in 7 days
2. Arrivalweight 100.00.0 of 10 pointsMichigan median 96.9half its reports arrived within 2.5 h
3. Continuityweight 10100.010.0 of 10 pointsMichigan median 100.0longest silence 4.1 h, on a schedule of one report every 2 h
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.