Unknown Tributary AT Dulles Station

Ranking Statistics

247 score61.3of 100

Virginia median

95.9the median score of 1,541 stations

Scoring higher

1,520stations in Virginia

Sharing its score

2ranks 1,521 to 1,522

Points deducted

38.731.0 reports received, 6.5 continuity, 0.7 arrival, 0.4 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Virginia median 100.0, 100.0, 96.5

Next above

GW5711rank 1,521; ahead on reports received 18.9% against 11.3%

Next below

GW7570rank 1,523; behind on 247 score 61.3 against 61.2

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 3511.34.0 of 35 pointsVirginia median 97.976 of 672 scheduled reports received in 7 days
2. Arrivalweight 1092.79.3 of 10 pointsVirginia median 92.7half its reports arrived within 14 min
3. Continuityweight 1034.63.5 of 10 pointsVirginia median 100.0longest silence 6 h, on a schedule of one report every 15 min
4. Accuracyweight 20-20.0 of 20 points, at the medianVirginia median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianVirginia median 100.0-
6. Forecast checkweight 10-9.7 of 10 points, at the medianVirginia median 96.5-

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