Greenbelt

Ranking Statistics

247 score75.8of 100

Maryland median

89.0the median score of 736 stations

Scoring higher

630stations in Maryland

Sharing its score

1no other station

Points deducted

24.220.7 reports received, 1.7 continuity, 0.8 arrival, 0.8 forecast check, 0.2 accuracy

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Maryland median 99.0, 100.0, 92.1

Next above

CW5307rank 630; ahead on 247 score 75.9 against 75.8

Next below

DW3949rank 632; behind on 247 score 75.8 against 75.7

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 3541.014.4 of 35 pointsMaryland median 82.141 of 100 scheduled reports received in 7 days
2. Arrivalweight 1091.69.2 of 10 pointsMaryland median 94.0half its reports arrived within 18 min
3. Continuityweight 1082.78.3 of 10 pointsMaryland median 100.0longest silence 8.7 h, on a schedule of one report every 1.7 h
4. Accuracyweight 20-19.8 of 20 points, at the medianMaryland median 99.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianMaryland median 100.0-
6. Forecast checkweight 10-9.2 of 10 points, at the medianMaryland median 92.1-

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