Storm Station
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At a river or reservoir gauge

DCP network, identified by the register

Identifier
01652500
Latitude
38.84333 N
Longitude
77.08586 W
Elevation
28 ft
Rank
1,044of 1,541 in Virginia, Oct 16
Observed
2:05 AMEDT, 25 minutes ago
Precipitation in the gauge's latest reading
0in

Ranking Statistics

On the radar over Fourmile Run At AlexandriaReflectivityStorm 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

Fourmile Run At Alexandria Report

Rank 1,044 of 1,541 in Virginia, 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 score90.1of 100

Virginia median
95.9the median score of 1,541 stations
Scoring higher
1,042stations in Virginia
Sharing its score
2ranks 1,043 to 1,044
Points deducted
9.99.0 reports received, 0.6 arrival, 0.4 forecast check
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Virginia median 100.0, 100.0, 96.5
Next above
373012077140201rank 1,043; ahead on reports received 74.4% against 74.2%
Next below
VA-LYC-7rank 1,045; behind on 247 score 90.1 against 90.0

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 3574.326.0 of 35 pointsVirginia median 97.9499 of 672 scheduled reports received in 7 days
  2. Arrivalweight 1094.49.4 of 10 pointsVirginia median 92.7half its reports arrived within 13 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 100.0-
  5. Instrument checksweight 15-15.0 of 15 points, at the medianVirginia median 100.0-
  6. Forecast checkweight 10-9.7 of 10 points, at the medianVirginia median 96.5-

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
1,044of 1,541 in Virginia, Oct 16
Schedule
every 15 minon the hour's :05, :20 and :35
Reports received, 24 hours
71 of 9673.9% of its schedule
Reports received, 7 days
499 of 67274.2% of its schedule
Days reported, 30 days
-
Longest silence, 7 days
45 minfrom Oct 10, 8:05 AM
Latest report
Oct 16, 6:05 AMlocal time
Time to reach Storm Station
13 min9 in 10 within 18 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 1,541 ranked stations in Virginia 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, 5; 10 to 19 per cent, 17; 20 to 29 per cent, 48; 30 to 39 per cent, 6; 40 to 49 per cent, 81; 50 to 59 per cent, 182; 60 to 69 per cent, 29; 70 to 79 per cent, 130; 80 to 89 per cent, 138; 90 to 99 per cent, 543; 100 per cent, 362. Fourmile Run At Alexandria received 74.2 per cent, 499 of 672 scheduled reports, rank 1,044 of 1,541.WHERE IT RANKS IN VIRGINIA, Oct 16THIS ONE: 74.2%, 499 OF 672, RANK 1,044 OF 1,541PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9510 to 191720 to 294830 to 39640 to 498150 to 5918260 to 692970 to 7913080 to 8913890 to 99543100362STATIONS, LOG SCALE
Chart of Fourmile Run At Alexandria's rank in Virginia by how it reported, day by day, from 2026-10-07 to 2026-10-16: 2026-10-07 rank 1,422 of 1,526; 2026-10-08 rank 1,423 of 1,534; 2026-10-09 rank 1,301 of 1,529; 2026-10-10 rank 1,296 of 1,530; 2026-10-11 rank 1,172 of 1,520; 2026-10-12 rank 1,121 of 1,532; 2026-10-13 rank 1,011 of 1,536; 2026-10-14 rank 1,020 of 1,537; 2026-10-15 rank 1,029 of 1,532; 2026-10-16 rank 1,044 of 1,541.ITS RANK IN VIRGINIA, DAY BY DAYRANK, FIRST AT THE TOP15001,0001,500Oct 7Oct 9Oct 11Oct 13Oct 15Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%362
90 to 99%543
80 to 89%138
70 to 79%130
60 to 69%29
50 to 59%182
40 to 49%81
30 to 39%6
20 to 29%48
10 to 19%17
0 to 9%5
DayRankStations rankedShare received
Oct 16, 20261,0441,54174.2%
Oct 15, 20261,0291,53274.2%
Oct 14, 20261,0201,53774.2%
Oct 13, 20261,0111,53674.4%
Oct 12, 20261,1211,53263.8%
Oct 11, 20261,1721,52053.1%
Oct 10, 20261,2961,53042.5%
Oct 9, 20261,3011,52942.2%
Oct 8, 20261,4231,53421.2%
Oct 7, 20261,4221,52610.7%

Station report

Fourmile Run At Alexandria, 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 28 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.89 inHg and the temperature at 58.9 F.

Section from sea level of where Fourmile Run At Alexandria stands in the atmosphere, height to scale: the station 28 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.89 inches of mercury, and temperature, 58.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 01652500FIG. D WHERE FOURMILE RUN AT ALEXANDRIA 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 ATMOSPHEREFOURMILE RUN AT ALEXANDRIA0 PER CENT OF THE AIR BELOW IT28 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 HERE29.89 inHgSTANDARD TEMPERATURE HERE58.9 FTITLEFourmile Run At Alexandria, the columnSTATION REPORT · DCP 01652500TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-16IDSR-01652500-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 16 the noon sun stands 42 degrees above the horizon at 38.84 N, and the day is 11 h 01 min long. Level ground there takes 67 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Fourmile Run At Alexandria, angles true: on Oct 16 it stands 42 degrees above the horizon, against 75 at the June solstice, 51 at the equinoxes and 28 at the December solstice; the day is 11 h 01 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 01652500FIG. E THE SUN AT FOURMILE RUN AT ALEXANDRIAELEVATION 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 75°EQUINOXES 51°DECEMBER SOLSTICE 28°OCT 16, 42°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 01 MINLEVEL GROUND TAKES 67 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 38.84 N; THE SUN'S DECLINATION -9.1°TITLEFourmile Run At Alexandria, the sunSTATION REPORT · DCP 01652500TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-01652500-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A data collection platform, 28 ft above sea level. Its sensors, as its network builds them.

Elevation of a data collection platform, Fourmile Run At Alexandria, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 01652500FIG. 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 SCALETITLEFourmile Run At Alexandria, the instrumentSTATION REPORT · DCP 01652500TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-16IDSR-01652500-3DRAWN 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 Fourmile Run At Alexandria

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