Iowa River 1 N Marshalltown

Ranking Statistics

247 score97.0of 100

Iowa median

94.7the median score of 1,060 stations

Scoring higher

222stations in Iowa

Sharing its score

14ranks 223 to 236

Points deducted

3.01.6 forecast check, 1.4 arrival

Counted at the median

Accuracy, instrument checks, forecast checknot measured at this station; Iowa median 100.0, 100.0, 83.8

Next above

DVNI4rank 222; ahead on 247 score 97.1 against 97.0

Next below

AMWI4rank 226; behind on median arrival 16 min 49 s against 16 min 57 s

Sharing its rank

2other 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 35100.035.0 of 35 pointsIowa median 99.0168 of 168 scheduled reports received in 7 days
2. Arrivalweight 1086.48.6 of 10 pointsIowa median 82.9half its reports arrived within 17 min
3. Continuityweight 10100.010.0 of 10 pointsIowa median 100.0longest silence 63 min, on a schedule of one report every 60 min
4. Accuracyweight 20-20.0 of 20 points, at the medianIowa median 100.0-
5. Instrument checksweight 15-15.0 of 15 points, at the medianIowa median 100.0-
6. Forecast checkweight 10-8.4 of 10 points, at the medianIowa median 83.8-

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