Chatham Harbour

Ranking Statistics

247 score94.5of 100

Massachusetts median

91.8the median score of 747 stations

Scoring higher

301stations in Massachusetts

Sharing its score

1no other station

Points deducted

5.52.2 arrival, 1.8 reports received, 1.6 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Massachusetts median 100.0, 100.0, 84.0

Next above

KNTM3rank 301; ahead on 247 score 94.8 against 94.5

Next below

NDGM3rank 303; behind on 247 score 94.5 against 94.4

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 3595.033.3 of 35 pointsMassachusetts median 85.7798 of 840 scheduled reports received in 7 days
2. Arrivalweight 1078.17.8 of 10 pointsMassachusetts median 100.0half its reports arrived within 21 min
3. Continuityweight 10100.010.0 of 10 pointsMassachusetts median 100.0longest silence 30 min, on a schedule of one report every 12 min
4. Accuracyweight 20-20.0 of 20 points, at the medianMassachusetts median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianMassachusetts median 100.0-
6. Forecast checkweight 10-8.4 of 10 points, at the medianMassachusetts median 84.0-

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