North Branch Potomac River at Luke

Ranking Statistics

247 score96.4of 100

Maryland median

89.0the median score of 736 stations

Scoring higher

208stations in Maryland

Sharing its score

4ranks 209 to 212

Points deducted

3.62.6 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

ANBM2rank 209; ahead on median arrival 17 min 51 s against 22 min 50 s

Next below

ERDM2rank 211; behind on median arrival 22 min 50 s against 22 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 35100.035.0 of 35 pointsMaryland median 82.1168 of 168 scheduled reports received in 7 days
2. Arrivalweight 1074.37.4 of 10 pointsMaryland median 94.0half its reports arrived within 23 min
3. Continuityweight 10100.010.0 of 10 pointsMaryland median 100.0longest silence 63 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.