Storm Station

At a river or reservoir gauge

DCP network, identified by the register

Identifier
385655077112201
Latitude
38.94855 N
Longitude
77.18952 W
Elevation
246 ft
Rank
1,211of 1,520 in Virginia, Oct 11
Observed
4:45 AMEDT, 46 minutes ago
Precipitation in the gauge's latest reading
0in

Ranking Statistics

On the radar over Met Station At Churchill Road Park At McleanReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a river or reservoir gauge

Drawn as the kind of place it stands at. 98 instruments in Virginia stand at one.

Station charts

Met Station At Churchill Road Park At Mclean Report

Rank 1,211 of 1,520 in Virginia, Oct 11. 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 score81.7of 100

Virginia median
94.7the median score of 1,520 stations
Scoring higher
1,206stations in Virginia
Sharing its score
8ranks 1,207 to 1,214
Points deducted
18.316.3 reports received, 1.6 arrival, 0.4 forecast check
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Virginia median 99.8, 100.0, 96.2
Next above
365111076224301rank 1,210; ahead on reports received 53.4% against 53.2%
Next below
364755076210001rank 1,212; behind on reports received 53.2% against 53.1%

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 3553.318.7 of 35 pointsVirginia median 96.7358 of 672 scheduled reports received in 7 days
  2. Arrivalweight 1084.48.4 of 10 pointsVirginia median 92.7half its reports arrived within 18 min
  3. Continuityweight 10100.010.0 of 10 pointsVirginia median 100.0longest silence 45 min, on a schedule of one report every 15 min
  4. Accuracyweight 20-20.0 of 20 points, at the medianVirginia median 99.8-
  5. Instrument checksweight 15-15.0 of 15 points, at the medianVirginia median 100.0-
  6. Forecast checkweight 10-9.6 of 10 points, at the medianVirginia median 96.2-

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 (45 min), none for 72 (18 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
Rank
1,211of 1,520 in Virginia, Oct 11
Schedule
every 15 minon the hour's :00, :15 and :30
Reports received, 24 hours
71 of 9673.9% of its schedule
Reports received, 7 days
387 of 67257.5% of its schedule, 389 reports in all
Days reported, 30 days
-
Longest silence, 7 days
46 minfrom Oct 11, 8:45 AM
Latest report
Oct 11, 8:45 AMlocal time
Time to reach Storm Station
18 min9 in 10 within 23 min

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

Its schedule is one report every 15 min, 96 in 24 hours. Two reports in the same 15 min count as one received.

Chart of the 1,520 ranked stations in Virginia on Oct 11 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, 5; 10 to 19 per cent, 50; 20 to 29 per cent, 22; 30 to 39 per cent, 26; 40 to 49 per cent, 72; 50 to 59 per cent, 211; 60 to 69 per cent, 24; 70 to 79 per cent, 117; 80 to 89 per cent, 143; 90 to 99 per cent, 597; 100 per cent, 253. Met Station At Churchill Road Park At Mclean received 53.2 per cent, 358 of 672 scheduled reports, rank 1,211 of 1,520.WHERE IT RANKS IN VIRGINIA, Oct 11THIS ONE: 53.2%, 358 OF 672, RANK 1,211 OF 1,520PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9510 to 195020 to 292230 to 392640 to 497250 to 5921160 to 692470 to 7911780 to 8914390 to 99597100253STATIONS, LOG SCALE
Chart of Met Station At Churchill Road Park At Mclean's rank in Virginia by how it reported, day by day, from 2026-10-07 to 2026-10-11: 2026-10-07 rank 1,457 of 1,526; 2026-10-08 rank 1,454 of 1,534; 2026-10-09 rank 1,362 of 1,529; 2026-10-10 rank 1,359 of 1,530; 2026-10-11 rank 1,211 of 1,520.ITS RANK IN VIRGINIA, DAY BY DAYRANK, FIRST AT THE TOP15001,0001,500Oct 7Oct 8Oct 9Oct 10Oct 11
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%253
90 to 99%597
80 to 89%143
70 to 79%117
60 to 69%24
50 to 59%211
40 to 49%72
30 to 39%26
20 to 29%22
10 to 19%50
0 to 9%5
DayRankStations rankedShare received
Oct 11, 20261,2111,52053.2%
Oct 10, 20261,3591,53042.5%
Oct 9, 20261,3621,52942.2%
Oct 8, 20261,4541,53421.2%
Oct 7, 20261,4571,52610.7%

Station report

Met Station At Churchill Road Park At Mclean, in 3 sheets

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

1The column

Contents

At 246 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.66 inHg and the temperature at 58.1 F.

Section from sea level of where Met Station At Churchill Road Park At Mclean stands in the atmosphere, height to scale: the station 246 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.66 inches of mercury, and temperature, 58.1 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 385655077112201FIG. D WHERE MET STATION AT CHURCHILL ROAD PARK AT MCLEAN 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 ATMOSPHEREMET STATION AT CHURCHILL ROAD PARK AT MCLEAN1 PER CENT OF THE AIR BELOW IT246 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 HERE29.66 inHgSTANDARD TEMPERATURE HERE58.1 FTITLEMet Station At Churchill Road Park At Mclean, the columnSTATION REPORT · DCP 385655077112201TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-11IDSR-385655077112201-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 11 the noon sun stands 44 degrees above the horizon at 38.95 N, and the day is 11 h 13 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 Met Station At Churchill Road Park At Mclean, angles true: on Oct 11 it stands 44 degrees above the horizon, against 74 at the June solstice, 51 at the equinoxes and 28 at the December solstice; the day is 11 h 13 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 385655077112201FIG. E THE SUN AT MET STATION AT CHURCHILL ROAD PARK AT MCLEANELEVATION 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 28°OCT 11, 44°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 13 MINLEVEL GROUND TAKES 69 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 38.95 N; THE SUN'S DECLINATION -7.2°TITLEMet Station At Churchill Road Park At Mclean, the sunSTATION REPORT · DCP 385655077112201TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-11IDSR-385655077112201-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A data collection platform, 246 ft above sea level. Its sensors, as its network builds them.

Elevation of a data collection platform, Met Station At Churchill Road Park At Mclean, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 385655077112201FIG. 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 SCALETITLEMet Station At Churchill Road Park At Mclean, the instrumentSTATION REPORT · DCP 385655077112201TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-11IDSR-385655077112201-3DRAWN 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

Near Met Station At Churchill Road Park At Mclean

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