John Kerr Lake AT John H Kerr Dam

Ranking Statistics

247 score96.3of 100

Virginia median

95.9the median score of 1,541 stations

Scoring higher

713stations in Virginia

Sharing its score

22ranks 714 to 735

Points deducted

3.71.7 arrival, 0.9 continuity, 0.7 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, 96.5

Next above

JBPV2rank 733; ahead on reports received 98.5% against 97.9%

Next below

SVEV2rank 735; behind on reports received 97.9% against 93.7%

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 3597.934.3 of 35 pointsVirginia median 97.9658 of 672 scheduled reports received in 7 days
2. Arrivalweight 1083.48.3 of 10 pointsVirginia median 92.7half its reports arrived within 18 min
3. Continuityweight 1090.99.1 of 10 pointsVirginia median 100.0longest silence 60 min, 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.