Storm Station
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At a shore station

DCP network, identified by the register

Identifier
NDBC-CNII2
Latitude
41.85600 N
Longitude
87.60900 W
Elevation
-
Rank
1,069of 1,393 in Illinois, Oct 16
Observed
2:15 AMCDT, 41 minutes ago
Air temperature
56.8F
Dew point
49.7F
Relative humidity
77%
Wind
16mph
Gust
21mph
Wind direction
270°

Ranking Statistics

On the radar over Northerly IsleReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a shore station

Drawn as the kind of place it stands at. It is the only instrument in Illinois that stands at one.

Station charts

Northerly Isle Report

Rank 1,069 of 1,393 in Illinois, Oct 16. The 247 rank orders a state's stations by their 247 score out of 100: how reliably they report, how accurate their readings are against a reference station, how their readings pass their checks, and how they stand against the forecast.

Ranking Statistics

247 score86.4of 100

Illinois median
95.9the median score of 1,393 stations
Scoring higher
1,067stations in Illinois
Sharing its score
2ranks 1,068 to 1,069
Points deducted
13.65.6 arrival, 5.2 reports received, 2.3 accuracy, 0.5 forecast check
Counted at the median
Forecast checknot measured at this station; Illinois median 94.7
Next above
BONI2rank 1,068; ahead on reports received 99.4% against 85.1%
Next below
IL-EF-37rank 1,070; behind on 247 score 86.4 against 86.2

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 3585.129.8 of 35 pointsIllinois median 99.1143 of 168 scheduled reports received in 7 days
  2. Arrivalweight 1044.44.4 of 10 pointsIllinois median 96.3half its reports arrived within 38 min
  3. Continuityweight 10100.010.0 of 10 pointsIllinois median 100.0longest silence 2 h, on a schedule of one report every 60 min
  4. Accuracyweight 2088.417.7 of 20 pointsIllinois median 100.0its temperature against the airport station KMDW, 9.0 miles away, over 137 readings: typical difference 3.2 °F beyond a steady offset of -1.4 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsIllinois median 100.00 of 137 readings failed their check against its reference station
  6. 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 2.4 °F of its reference, typically, none beyond 8.9 °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
Rank
1,069of 1,393 in Illinois, Oct 16
Schedule
every houron the hour's :15
Reports received, 24 hours
23 of 2495.8% of its schedule
Reports received, 7 days
151 of 16889.8% of its schedule, 152 reports in all
Days reported, 30 days
-
Longest silence, 7 days
2 hoursfrom Oct 10, 7:15 AM
Latest report
Oct 16, 7:15 AMlocal time
Time to reach Storm Station
38 min9 in 10 within 38 min
Against its reference, 30 days
-1.3 °Fcooler than the airport station KMDW, 9.0 miles away, on average over 145 readings; typical difference 3.4 °F

From Storm Station's own record of every report it heard from this station.

Against its reference: each temperature this station reports is compared with the nearest airport or climate reference station that reported within half an hour, up to 15 miles away. The figure is its reading less the reference's, on average, as both were reported; the typical difference is the root mean square. The difference in height is shown where both heights are known.

Its schedule is one report every hour, 24 in 24 hours. Two reports in the same hour count as one received.

Chart of the 1,393 ranked stations in Illinois on Oct 16 by the share of their scheduled reports received in Storm Station's own record, up to 7 days, in tenths: 0 to 9 per cent, 2; 10 to 19 per cent, 8; 20 to 29 per cent, 28; 30 to 39 per cent, 5; 40 to 49 per cent, 83; 50 to 59 per cent, 144; 60 to 69 per cent, 25; 70 to 79 per cent, 91; 80 to 89 per cent, 143; 90 to 99 per cent, 339; 100 per cent, 525. Northerly Isle received 85.1 per cent, 143 of 168 scheduled reports, rank 1,069 of 1,393.WHERE IT RANKS IN ILLINOIS, Oct 16THIS ONE: 85.1%, 143 OF 168, RANK 1,069 OF 1,393PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9210 to 19820 to 292830 to 39540 to 498350 to 5914460 to 692570 to 799180 to 8914390 to 99339100525STATIONS, LOG SCALE
Chart of Northerly Isle's rank in Illinois by how it reported, day by day, from 2026-10-11 to 2026-10-16: 2026-10-11 rank 1,348 of 1,359; 2026-10-12 rank 1,316 of 1,354; 2026-10-13 rank 1,316 of 1,360; 2026-10-14 rank 1,272 of 1,356; 2026-10-15 rank 1,157 of 1,375; 2026-10-16 rank 1,069 of 1,393.ITS RANK IN ILLINOIS, DAY BY DAYRANK, FIRST AT THE TOP15001,0001,500Oct 11Oct 12Oct 13Oct 14Oct 15Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%525
90 to 99%339
80 to 89%143
70 to 79%91
60 to 69%25
50 to 59%144
40 to 49%83
30 to 39%5
20 to 29%28
10 to 19%8
0 to 9%2
DayRankStations rankedShare received
Oct 16, 20261,0691,39385.1%
Oct 15, 20261,1571,37571.4%
Oct 14, 20261,2721,35657.7%
Oct 13, 20261,3161,36043.4%
Oct 12, 20261,3161,35429.7%
Oct 11, 20261,3481,35915.4%

Station report

Northerly Isle, in 2 sheets

Drawn from the register, in the manner of the Field Book, and opened beside the plates that explain each part of it.

1The sun

Contents

On Oct 16 the noon sun stands 39 degrees above the horizon at 41.86 N, and the day is 10 h 54 min long. Level ground there takes 63 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Northerly Isle, angles true: on Oct 16 it stands 39 degrees above the horizon, against 72 at the June solstice, 48 at the equinoxes and 25 at the December solstice; the day is 10 h 54 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-CNII2FIG. E THE SUN AT NORTHERLY ISLEELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 72°EQUINOXES 48°DECEMBER SOLSTICE 25°OCT 16, 39°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 54 MINLEVEL GROUND TAKES 63 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 41.86 N; THE SUN'S DECLINATION -9.1°TITLENortherly Isle, the sunSTATION REPORT · DCP NDBC-CNII2TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-16IDSR-NDBCCNII2-1DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

2The instrument

Contents

A data collection platform. Its sensors, as its network builds them.

Elevation of a data collection platform, Northerly Isle, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-CNII2FIG. F THE INSTRUMENTELEVATION OF A DATA COLLECTION PLATFORM, EACH SENSOR WITH WHAT IT READANTENNA, SENDING BY SATELLITE-AIR TEMPERATURE-PRECIPITATION GAUGE-SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLENortherly Isle, the instrumentSTATION REPORT · DCP NDBC-CNII2TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-16IDSR-NDBCCNII2-2DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

The instrumentWhat an instrument is FB-INS-001

What it seesMoon and tides FB-CLK-003Hurricane FB-EVT-043Nor'easter FB-EVT-066Flash flood FB-EVT-100Coastal flood FB-EVT-105

What this instrument measures for

1 place reads it as one of the nearest to it.

Near Northerly Isle

Gauges

Weather instruments

Places