Cahaba River at Centreville

Ranking Statistics

247 score97.0of 100

Alabama median

95.6the median score of 798 stations

Scoring higher

311stations in Alabama

Sharing its score

27ranks 312 to 338

Points deducted

3.02.4 arrival, 0.5 forecast check, 0.2 reports received

Counted at the median

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

Next above

03575980rank 317; ahead on reports received 100% against 99.4%

Next below

ALPA1rank 337; behind on median arrival 21 min 48 s against 21 min 49 s

Sharing its rank

13other 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 pointsAlabama median 98.8167 of 168 scheduled reports received in 7 days
2. Arrivalweight 1076.47.6 of 10 pointsAlabama median 87.5half its reports arrived within 22 min
3. Continuityweight 10100.010.0 of 10 pointsAlabama 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 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.