James River AT Sewells Point

Ranking Statistics

247 score96.5of 100

Virginia median

95.9the median score of 1,554 stations

Scoring higher

694stations in Virginia

Sharing its score

8ranks 695 to 702

Points deducted

3.52.5 arrival, 0.6 reports received, 0.4 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Virginia median 100.0, 100.0, 95.7

Next above

MNPV2rank 695; ahead on median arrival 22 min 31 s against 22 min 32 s

Next below

WATV2rank 700; behind on reports received 98.3% against 97.1%

Sharing its rank

2other 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 3598.334.4 of 35 pointsVirginia median 97.6826 of 840 scheduled reports received in 7 days
2. Arrivalweight 1074.97.5 of 10 pointsVirginia median 92.7half its reports arrived within 23 min
3. Continuityweight 10100.010.0 of 10 pointsVirginia median 100.0longest silence 30 min, on a schedule of one report every 12 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 10-9.6 of 10 points, at the medianVirginia median 95.7-

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