James River AT Richmond Westham

Ranking Statistics

247 score97.6of 100

Virginia median

95.9the median score of 1,541 stations

Scoring higher

550stations in Virginia

Sharing its score

19ranks 551 to 569

Points deducted

2.41.8 arrival, 0.4 forecast check, 0.2 reports received

Counted at the median

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

Next above

PCCV2rank 549; ahead on 247 score 97.7 against 97.6

Next below

BFCV2rank 553; behind on reports due 336 against 168, the longer record first

Sharing its rank

1other 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 3599.434.8 of 35 pointsVirginia median 97.9334 of 336 scheduled reports received in 7 days
2. Arrivalweight 1082.08.2 of 10 pointsVirginia median 92.7half its reports arrived within 19 min
3. Continuityweight 10100.010.0 of 10 pointsVirginia median 100.0longest silence 60 min, on a schedule of one report every 30 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.