- Stage now
- 45.17 ftreported Oct 15, 9:15 PM CDT
- 24 hour change
- -
- Elevation
- 657 ftabove sea level
- County
- Will County
- Position
- 41.5394° N, 87.9308° W
- Record since
- 2013
Water level
Mokena - Marley Creek
Stage is the height of the water's surface above the gauge's own fixed zero, in feet, not the depth of the water. Every point drawn is a reading the gauge sent, at the time it sent it.
How it reports
- Schedule
- every houron the hour's :15
- Reports received, 24 hours
- 24 of 24100% of its schedule, 25 reports in all
- Reports received, 7 days
- 168 of 168100% of its schedule, 183 reports in all
- Longest silence, 7 days
- 1 hourfrom Oct 8, 10:15 PM
- Latest report
- Oct 15, 9:15 PMlocal time
- Time to reach Storm Station
- 22 min9 in 10 within 32 min
From Storm Station's own record of every report it heard from this station.
Its schedule is one report every hour, 24 in 24 hours. Two reports in the same hour count as one received.
Ranking Statistics
247 score97.1of 100
- Illinois median
- 95.9the median score of 1,393 stations
- Scoring higher
- 540stations in Illinois
- Sharing its score
- 41ranks 541 to 581
- Points deducted
- 2.92.4 arrival, 0.5 forecast check
- Counted at the median
- Accuracy, instrument checks, forecast checknot measured at this station; Illinois median 100.0, 100.0, 94.7
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.
- Reports receivedweight 35100.035.0 of 35 pointsIllinois median 99.1168 of 168 scheduled reports received in 7 days
- Arrivalweight 1076.17.6 of 10 pointsIllinois median 96.3half its reports arrived within 22 min
- Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 60 min, on a schedule of one report every 60 min
- Accuracyweight 20-20.0 of 20 points, at the medianIllinois median 100.0-
- Instrument checksweight 15-15.0 of 15 points, at the medianIllinois median 100.0-
- Forecast checkweight 10-9.5 of 10 points, at the medianIllinois median 94.7-
The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.
How each part is scored
- Reports received
- Full marks for every scheduled report received, none for none, in proportion between
- Arrival
- Full marks for a median arrival within 10 min, none at 60 min
- Continuity
- Full marks for a longest silence of 3 reports or less (3 h), none for 72 (72 h)
- Accuracy
- Full marks within 1.5 °F of its reference, typically, none beyond 8.0 °F
- Instrument checks
- Full marks for no reading failed, none for 5 per cent or more
- Forecast check
- Full marks within 2 °F of the forecast on average, none at 8 °F
Near Mokena - Marley Creek
Gauges
Weather instruments
How to read a gauge
A gauge measures the height of the water where it stands, its stage, in feet above a fixed mark at that gauge. Two gauges' stages are not comparable: each is measured from its own mark, and a reservoir's is often its height above sea level.
The stage shown is the latest the gauge reported, with the time it reported it. Storm Station hears each gauge on its own schedule and ranks it among its state's stations by its 247 score, how reliably it reports and how its readings hold up: that is its 247 rank.