Selma 13 WNW

Ranking Statistics

247 score92.2of 100

Alabama median

95.6the median score of 798 stations

Scoring higher

538stations in Alabama

Sharing its score

26ranks 539 to 564

Points deducted

7.87.3 arrival, 0.5 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Alabama median 100.0, 100.0, 95.4

Next above

VHXA1rank 539; ahead on reports due 168 against 84, the longer record first

Next below

63868rank 558; behind on median arrival 90 min 51 s against 90 min 52 s

Sharing its rank

12other 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 35100.035.0 of 35 pointsAlabama median 98.884 of 84 scheduled reports received in 7 days
2. Arrivalweight 1027.02.7 of 10 pointsAlabama median 87.5half its reports arrived within 1.5 h
3. Continuityweight 10100.010.0 of 10 pointsAlabama median 100.0longest silence 3 h, on a schedule of one report every 2 h
4. Accuracyweight 20-20.0 of 20 points, at the medianAlabama median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianAlabama median 100.0-
6. Forecast checkweight 10-9.5 of 10 points, at the medianAlabama median 95.4-

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