Storm Station

In a volunteer observer's own ground

CWOP network, identified by the register

Identifier
AB9BZ
Latitude
41.79000 N
Longitude
87.77000 W
Elevation
615 ft
Rank
-
Air temperature
71F
Relative humidity
62%
Pressure
29.57inHg
Wind
1mph
Gust
3mph
Wind direction
58°
Precipitation this hour
0in
Precipitation today
0in

On the radar over Citizen station AB9BZReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

In a volunteer observer's own ground

Drawn as the kind of place it stands at. 1,767 instruments in Illinois stand at one.

Station charts

Citizen station AB9BZ Report

Rank
-
Time to reach Storm Station
15 s
Against its reference, 30 days
+1.6 °Fwarmer than the airport station KMDW, 0.9 miles away, on average over 2 readings; typical difference 3.8 °F; also compared with 1 other reference 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.

Chart of the 1,162 ranked stations in Illinois on Oct 4 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, 1; 10 to 19 per cent, 32; 20 to 29 per cent, 2; 30 to 39 per cent, 25; 40 to 49 per cent, 12; 50 to 59 per cent, 12; 60 to 69 per cent, 200; 70 to 79 per cent, 22; 80 to 89 per cent, 33; 90 to 99 per cent, 318; 100 per cent, 505.WHERE IT RANKS IN ILLINOIS, Oct 4PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9110 to 193220 to 29230 to 392540 to 491250 to 591260 to 6920070 to 792280 to 893390 to 99318100505STATIONS, LOG SCALE
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%505
90 to 99%318
80 to 89%33
70 to 79%22
60 to 69%200
50 to 59%12
40 to 49%12
30 to 39%25
20 to 29%2
10 to 19%32
0 to 9%1

Station report

Citizen station AB9BZ, in 4 sheets

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

1The wind

Contents

From the east northeast (58 degrees) at 1 mph, gusting 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Citizen station AB9BZ, north up: blowing from 58 degrees, the east northeast, at 1 miles an hour, gusting 3; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AB9BZFIG. C THE WIND AT CITIZEN STATION AB9BZPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 58°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 1 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station AB9BZ, the windSTATION REPORT · CWOP AB9BZTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-04IDSR-AB9BZ-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

From the Field Book

2The column

Contents

At 615 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.26 inHg and the temperature at 56.8 F; the station's altimeter setting of 29.57 inHg means its barometer reads 28.92 inHg; it reports 71.0 F, 14.2 F warmer than standard.

Section from sea level of where Citizen station AB9BZ stands in the atmosphere, height to scale: the station 615 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.26 inches of mercury, and temperature, 56.8 degrees Fahrenheit; the altimeter setting of 29.57 and the station pressure it means, 28.92.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AB9BZFIG. D WHERE CITIZEN STATION AB9BZ STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION AB9BZ2 PER CENT OF THE AIR BELOW IT615 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.26 inHgSTANDARD TEMPERATURE HERE56.8 FALTIMETER SETTING, REPORTED29.57 inHgITS BAROMETER READS28.92 inHgTEMPERATURE, REPORTED71.0 FTITLECitizen station AB9BZ, the columnSTATION REPORT · CWOP AB9BZTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-04IDSR-AB9BZ-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

3The sun

Contents

On Oct 4 the noon sun stands 44 degrees above the horizon at 41.79 N, and the day is 11 h 27 min long. Level ground there takes 69 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station AB9BZ, angles true: on Oct 4 it stands 44 degrees above the horizon, against 72 at the June solstice, 48 at the equinoxes and 25 at the December solstice; the day is 11 h 27 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AB9BZFIG. E THE SUN AT CITIZEN STATION AB9BZELEVATION 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 4, 44°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 27 MINLEVEL GROUND TAKES 69 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 41.79 N; THE SUN'S DECLINATION -4.6°TITLECitizen station AB9BZ, the sunSTATION REPORT · CWOP AB9BZTYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-04IDSR-AB9BZ-3DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

4The instrument

Contents

A weather instrument, 615 ft above sea level. Its latest report is written on the sensors that made it.

Elevation of the instrument, Citizen station AB9BZ, each sensor drawn and labelled with what it read: air temperature, 71.0 f; precipitation gauge, 0.00 in today.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AB9BZFIG. F THE INSTRUMENTELEVATION OF THE INSTRUMENT, EACH SENSOR WITH WHAT IT READANTENNA, SENDING BY SATELLITE-AIR TEMPERATURE71.0 FPRECIPITATION GAUGE0.00 IN TODAYSCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLECitizen station AB9BZ, the instrumentSTATION REPORT · CWOP AB9BZTYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 4 of 4DATE2026-10-04IDSR-AB9BZ-4DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

Near Citizen station AB9BZ

Gauges

Weather instruments

Places