Blackwater River near Rocky Mount

Ranking Statistics

247 score98.5of 100

Virginia median

95.9the median score of 1,541 stations

Scoring higher

305stations in Virginia

Sharing its score

21ranks 306 to 326

Points deducted

1.50.8 arrival, 0.4 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

TNKV2rank 314; ahead on median arrival 13 min 54 s against 13 min 55 s

Next below

HEFrank 327; behind on 247 score 98.5 against 98.4

Sharing its rank

3other 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 3598.834.6 of 35 pointsVirginia median 97.9166 of 168 scheduled reports received in 7 days
2. Arrivalweight 1092.29.2 of 10 pointsVirginia median 92.7half its reports arrived within 14 min
3. Continuityweight 10100.010.0 of 10 pointsVirginia median 100.0longest silence 2 h, on a schedule of one report every 60 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.