Merrimack River at Nashua

Ranking Statistics

247 score94.4of 100

New Hampshire median

92.0the median score of 385 stations

Scoring higher

129stations in New Hampshire

Sharing its score

2ranks 130 to 131

Points deducted

5.62.4 forecast check, 2.4 arrival, 0.6 reports received, 0.2 accuracy

Counted at the median

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

Next above

NPEN3rank 128; ahead on 247 score 94.6 against 94.4

Next below

ERRN3rank 131; behind on reports received 98.2% against 97.1%

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 3598.234.4 of 35 pointsNew Hampshire median 94.3165 of 168 scheduled reports received in 7 days
2. Arrivalweight 1076.27.6 of 10 pointsNew Hampshire median 100.0half its reports arrived within 22 min
3. Continuityweight 10100.010.0 of 10 pointsNew Hampshire median 100.0longest silence 3 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.