Holt Lock and Dam

Ranking Statistics

247 score98.0of 100

Alabama median

95.6the median score of 798 stations

Scoring higher

199stations in Alabama

Sharing its score

41ranks 200 to 240

Points deducted

2.01.4 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

WCHA1rank 213; ahead on longest silence 90 min against 120 min

Next below

FLRA1rank 238; behind on reports received 99.4% against 99.1%

Sharing its rank

21other 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 1086.48.6 of 10 pointsAlabama median 87.5half its reports arrived within 17 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.