Ne Branch Anacostia River AT Riverdale - Riverdale Rd

Ranking Statistics

247 score96.9of 100

Maryland median

89.0the median score of 736 stations

Scoring higher

181stations in Maryland

Sharing its score

14ranks 182 to 195

Points deducted

3.11.5 arrival, 0.8 forecast check, 0.6 reports received, 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

GAMM2rank 183; ahead on reports received 98.5% against 98.2%

Next below

WRBM2rank 185; behind on reports due 504 against 168, the longer record first

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 3598.234.4 of 35 pointsMaryland median 82.1495 of 504 scheduled reports received in 7 days
2. Arrivalweight 1084.98.5 of 10 pointsMaryland median 94.0half its reports arrived within 18 min
3. Continuityweight 10100.010.0 of 10 pointsMaryland median 100.0longest silence 45 min, on a schedule of one report every 20 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.