Nw Branch Anacostia River at Colesville

Ranking Statistics

247 score97.4of 100

Maryland median

89.0the median score of 736 stations

Scoring higher

149stations in Maryland

Sharing its score

8ranks 150 to 157

Points deducted

2.61.6 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

01603000rank 150; ahead on median arrival 17 min 57 s against 17 min 58 s

Next below

FLRM2rank 156; behind on reports received 100% against 97.0%

Sharing its rank

3other 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 pointsMaryland median 82.1168 of 168 scheduled reports received in 7 days
2. Arrivalweight 1084.18.4 of 10 pointsMaryland median 94.0half its reports arrived within 18 min
3. Continuityweight 10100.010.0 of 10 pointsMaryland median 100.0longest silence 60 min, on a schedule of one report every 60 min
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.