- Stage now
- -49.87 ftreported Oct 3, 10:00 PM CDT
- 24 hour change
- Fell 11.24 ftsince Oct 2, 10:00 PM
- Elevation
- 594 ftabove sea level
- County
- Cook County
- Position
- 41.7775° N, 87.8366° W
- Record since
- 2022
Water level
McCook Reservoir
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.
- Latest
- -49.87 ftOct 3, 10:00 PM
- Highest
- -34.52 ftSep 22, 5:00 AM
- Lowest
- -49.87 ftOct 3, 10:00 PM
- Range
- 15.35 fthighest less lowest
- Change
- Fell 2.34 ftsince Sep 20, 6:00 AM
- Readings
- 490
The readings these charts were drawn from, as a table
| Day | High ft | Low ft | Average ft | Last ft | Readings |
|---|---|---|---|---|---|
| Oct 3 | -39.31 | -49.87 | -44.48 | -49.87 | 89 |
| Oct 2 | -38.41 | -47.69 | -41.39 | -39.25 | 96 |
| Oct 1 | -47.90 | -49.35 | -48.59 | -47.90 | 6 |
| Sep 23 | -44.67 | -49.79 | -47.20 | -49.79 | 35 |
| Sep 22 | -34.52 | -44.49 | -38.44 | -44.49 | 96 |
| Sep 21 | -34.58 | -36.65 | -35.05 | -34.58 | 96 |
| Sep 20 | -36.74 | -47.53 | -41.19 | -36.74 | 72 |
How it reports
- Reports received, 7 days
- 7
- Longest silence, 7 days
- 24 hoursfrom Oct 9, 7:00 AM
- Latest report
- Oct 15, 7:00 AMlocal time
- Time to reach Storm Station
- 37 min
From Storm Station's own record of every report it heard from this station.
Ranking Statistics
247 score99.5of 100
- Illinois median
- 95.9the median score of 1,393 stations
- Scoring higher
- 11stations in Illinois
- Sharing its score
- 319ranks 12 to 330
- Points deducted
- 0.50.5 forecast check
- Counted at the median
- Accuracy, instrument checks, forecast checknot measured at this station; Illinois median 100.0, 100.0, 94.7
- Sharing its rank
- 1other 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.
- Reports receivedweight 35100.035.0 of 35 pointsIllinois median 99.17 of 7 scheduled reports received in 7 days
- Arrivalweight 10100.010.0 of 10 pointsIllinois median 96.3half its reports arrived within 37 min
- Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 24 h, on a schedule of one report every 24 h
- 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 2.4 h, none at 24 h
- Continuity
- Full marks for a longest silence of 3 reports or less (72 h), none for 72 (1728 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 McCook Reservoir
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.