Merrimack River at Concord

Ranking Statistics

247 score93.9of 100

New Hampshire median

92.0the median score of 385 stations

Scoring higher

139stations in New Hampshire

Sharing its score

16ranks 140 to 155

Points deducted

6.13.3 arrival, 2.4 forecast check, 0.2 accuracy, 0.2 reports received

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; New Hampshire median 98.9, 100.0, 76.1

Next above

WOON3rank 145; ahead on median arrival 26 min 37 s against 26 min 38 s

Next below

KNEN3rank 156; behind on 247 score 93.9 against 93.8

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 3599.434.8 of 35 pointsNew Hampshire median 94.3167 of 168 scheduled reports received in 7 days
2. Arrivalweight 1066.76.7 of 10 pointsNew Hampshire median 100.0half its reports arrived within 27 min
3. Continuityweight 10100.010.0 of 10 pointsNew Hampshire median 100.0longest silence 2 h, on a schedule of one report every 60 min
4. Accuracyweight 20-19.8 of 20 points, at the medianNew Hampshire median 98.9-
5. Instrument checksweight 15-15.0 of 15 points, at the medianNew Hampshire median 100.0-
6. Forecast checkweight 10-7.6 of 10 points, at the medianNew Hampshire median 76.1-

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