Tombigbee River 3 W Demopolis Lock and Dam

Ranking Statistics

247 score97.0of 100

Alabama median

95.9the median score of 781 stations

Scoring higher

345stations in Alabama

Sharing its score

10ranks 346 to 355

Points deducted

3.02.4 arrival, 0.4 reports received, 0.2 forecast check

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Alabama median 100.0, 100.0, 98.1

Next above

320602087235701rank 347; ahead on reports received 99.4% against 98.8%

Next below

ELLA1rank 353; behind on reports received 98.8% against 95.8%

Sharing its rank

4other 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 pointsAlabama median 99.0166 of 168 scheduled reports received in 7 days
2. Arrivalweight 1076.37.6 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 10-9.8 of 10 points, at the medianAlabama median 98.1-

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