Storm Station
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In a volunteer observer's own ground

CWOP network, identified by the register

Identifier
FW7930
Latitude
39.50000 N
Longitude
76.94000 W
Elevation
698 ft
Rank
549of 736 in Maryland, Oct 16
Observed
12:15 AMEDT, 1 hour ago
Air temperature
57F
Relative humidity
95%
Pressure
30.06inHg
Wind
0mph
Gust
3mph
Wind direction
151°
Precipitation this hour
0in
Precipitation today
0.1in

Ranking Statistics

On the radar over Citizen station FW7930ReflectivityStorm 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. 571 instruments in Maryland stand at one.

Station charts

Citizen station FW7930 Report

Rank 549 of 736 in Maryland, 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 score80.0of 100

Maryland median
89.0the median score of 736 stations
Scoring higher
547stations in Maryland
Sharing its score
2ranks 548 to 549
Points deducted
20.016.9 reports received, 2.3 continuity, 0.8 forecast check
Counted at the median
Forecast checknot measured at this station; Maryland median 92.1
Next above
GW3347rank 548; ahead on reports received 56.5% against 51.5%
Next below
MD141rank 550; behind on 247 score 80.0 against 79.9

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 3551.618.1 of 35 pointsMaryland median 82.1113 of 219 scheduled reports received in 7 days
  2. Arrivalweight 10100.010.0 of 10 pointsMaryland median 94.0half its reports arrived within 18 s
  3. Continuityweight 1077.27.7 of 10 pointsMaryland median 100.0longest silence 4.8 h, on a schedule of one report every 46 min
  4. Accuracyweight 20100.020.0 of 20 pointsMaryland median 99.0its temperature against the airport station KDMW, 8.4 miles away, over 97 readings: typical difference 1.8 °F beyond a steady offset of -1.1 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsMaryland median 100.00 of 97 readings failed their check against its reference station
  6. Forecast checkweight 10-9.2 of 10 points, at the medianMaryland median 92.1-

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 (2.3 h), none for 72 (55.2 h)
Accuracy
Full marks within 2.3 °F of its reference, typically, none beyond 8.8 °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
549of 736 in Maryland, Oct 16
Time to reach Storm Station
18 s9 in 10 within 31 s
Against its reference, 30 days
-1.4 °Fcooler than the airport station KDMW, 8.4 miles away, on average over 178 readings; typical difference 2.7 °F

The reports received are counted from the network's own archive of this station's reports. Its 247 rank is counted from Storm Station's own record, which holds less than 7 days of it so far: 113 of 219 scheduled reports received, 51.5%.

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 736 ranked stations in Maryland 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, 4; 10 to 19 per cent, 20; 20 to 29 per cent, 27; 30 to 39 per cent, 11; 40 to 49 per cent, 62; 50 to 59 per cent, 96; 60 to 69 per cent, 107; 70 to 79 per cent, 36; 80 to 89 per cent, 35; 90 to 99 per cent, 183; 100 per cent, 155. Citizen station FW7930 received 51.5 per cent, 113 of 219 scheduled reports, rank 549 of 736.WHERE IT RANKS IN MARYLAND, Oct 16THIS ONE: 51.5%, 113 OF 219, RANK 549 OF 736PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9410 to 192020 to 292730 to 391140 to 496250 to 599660 to 6910770 to 793680 to 893590 to 99183100155STATIONS, LOG SCALE
Chart of Citizen station FW7930's rank in Maryland by how it reported, day by day, from 2026-10-05 to 2026-10-16: 2026-10-05 rank 599 of 686; 2026-10-06 rank 563 of 702; 2026-10-07 rank 545 of 729; 2026-10-08 rank 591 of 731; 2026-10-09 rank 443 of 733; 2026-10-10 rank 444 of 733; 2026-10-11 rank 595 of 725; 2026-10-12 rank 552 of 728; 2026-10-13 rank 571 of 726; 2026-10-14 rank 588 of 727; 2026-10-15 rank 560 of 723; 2026-10-16 rank 549 of 736.ITS RANK IN MARYLAND, DAY BY DAYRANK, FIRST AT THE TOP1200400600Oct 5Oct 7Oct 9Oct 11Oct 13Oct 15Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%155
90 to 99%183
80 to 89%35
70 to 79%36
60 to 69%107
50 to 59%96
40 to 49%62
30 to 39%11
20 to 29%27
10 to 19%20
0 to 9%4
DayRankStations rankedShare received
Oct 16, 202654973651.5%
Oct 15, 202656072349.7%
Oct 14, 202658872748.6%
Oct 13, 202657172650.0%
Oct 12, 202655272852.6%
Oct 11, 202659572546.7%
Oct 10, 202644473356.4%
Oct 9, 202644373356.8%
Oct 8, 202659173146.7%
Oct 7, 202654572952.9%
Oct 6, 202656370251.1%
Oct 5, 202659968640.0%

Station report

Citizen station FW7930, 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

Calm.

Plan of the wind at Citizen station FW7930, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW7930FIG. C THE WIND AT CITIZEN STATION FW7930PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station FW7930, the windSTATION REPORT · CWOP FW7930TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-FW7930-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

From the Field Book

2The column

Contents

At 698 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.17 inHg and the temperature at 56.5 F; the station's altimeter setting of 30.06 inHg means its barometer reads 29.31 inHg; it reports 57.0 F, 0.5 F warmer than standard.

Section from sea level of where Citizen station FW7930 stands in the atmosphere, height to scale: the station 698 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.17 inches of mercury, and temperature, 56.5 degrees Fahrenheit; the altimeter setting of 30.06 and the station pressure it means, 29.31.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW7930FIG. D WHERE CITIZEN STATION FW7930 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 FW79302 PER CENT OF THE AIR BELOW IT698 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 HERE29.17 inHgSTANDARD TEMPERATURE HERE56.5 FALTIMETER SETTING, REPORTED30.06 inHgITS BAROMETER READS29.31 inHgTEMPERATURE, REPORTED57.0 FTITLECitizen station FW7930, the columnSTATION REPORT · CWOP FW7930TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-FW7930-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

3The sun

Contents

On Oct 16 the noon sun stands 41 degrees above the horizon at 39.50 N, and the day is 10 h 59 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station FW7930, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 51 at the equinoxes and 27 at the December solstice; the day is 10 h 59 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW7930FIG. E THE SUN AT CITIZEN STATION FW7930ELEVATION 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 74°EQUINOXES 51°DECEMBER SOLSTICE 27°OCT 16, 41°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 59 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.50 N; THE SUN'S DECLINATION -9.1°TITLECitizen station FW7930, the sunSTATION REPORT · CWOP FW7930TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-FW7930-3DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

4The instrument

Contents

A weather instrument, 698 ft above sea level. Its latest report is written on the sensors that made it.

Elevation of the instrument, Citizen station FW7930, each sensor drawn and labelled with what it read: air temperature, 57.0 f; precipitation gauge, 0.06 in today.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT FW7930FIG. F THE INSTRUMENTELEVATION OF THE INSTRUMENT, EACH SENSOR WITH WHAT IT READANTENNA, SENDING BY SATELLITE-AIR TEMPERATURE57.0 FPRECIPITATION GAUGE0.06 IN TODAYSCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLECitizen station FW7930, the instrumentSTATION REPORT · CWOP FW7930TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 4 of 4DATE2026-10-16IDSR-FW7930-4DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

Near Citizen station FW7930

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