Storm Station
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At a dam

DCP network, identified by the register

Identifier
HGDM2
Latitude
38.87230 N
Longitude
76.83300 W
Elevation
-
Listed
Automatically, on 347 reports in 169 hours over the last seven days
Rank
540of 736 in Maryland, Oct 16
Observed
2:00 AMEDT, 30 minutes ago
Precipitation this hour
0in
Precipitation today
0in

Ranking Statistics

On the radar over Unnamed Tributary AT Heritage Glen DamReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a dam

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

Station charts

Unnamed Tributary AT Heritage Glen Dam Report

Rank 540 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 score80.6of 100

Maryland median
89.0the median score of 736 stations
Scoring higher
535stations in Maryland
Sharing its score
5ranks 536 to 540
Points deducted
19.416.9 reports received, 0.9 continuity, 0.8 forecast check, 0.6 arrival, 0.2 accuracy
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Maryland median 99.0, 100.0, 92.1
Next above
BVLM2rank 539; ahead on reports received 51.7% against 51.6%
Next below
MD109rank 541; behind on 247 score 80.6 against 80.5

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 82.1347 of 672 scheduled reports received in 7 days
  2. Arrivalweight 1094.39.4 of 10 pointsMaryland median 94.0half its reports arrived within 13 min
  3. Continuityweight 1090.99.1 of 10 pointsMaryland median 100.0longest silence 60 min, on a schedule of one report every 15 min
  4. Accuracyweight 20-19.8 of 20 points, at the medianMaryland median 99.0-
  5. Instrument checksweight 15-15.0 of 15 points, at the medianMaryland median 100.0-
  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 (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
540of 736 in Maryland, Oct 16
Schedule
every 15 minon the hour's :00, :41 and :45
Reports received, 24 hours
47 of 9648.9% of its schedule, 71 reports in all
Reports received, 7 days
350 of 67252.0% of its schedule, 571 reports in all
Days reported, 30 days
30 of 30
Longest silence, 7 days
56 minfrom Oct 15, 11:45 PM
Latest report
Oct 16, 2:00 AMlocal time

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: 347 of 672 scheduled reports received, 51.6%.

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 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. Unnamed Tributary AT Heritage Glen Dam received 51.6 per cent, 347 of 672 scheduled reports, rank 540 of 736.WHERE IT RANKS IN MARYLAND, Oct 16THIS ONE: 51.6%, 347 OF 672, RANK 540 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 Unnamed Tributary AT Heritage Glen Dam's rank in Maryland by how it reported, day by day, from 2026-09-26 to 2026-10-16: 2026-09-26 rank 328 of 399; 2026-09-27 rank 314 of 402; 2026-09-28 rank 370 of 418; 2026-09-29 rank 381 of 424; 2026-09-30 rank 378 of 424; 2026-10-01 rank 381 of 426; 2026-10-02 rank 485 of 540; 2026-10-03 rank 484 of 540; 2026-10-04 rank 507 of 564; 2026-10-05 rank 583 of 686; 2026-10-06 rank 604 of 702; 2026-10-07 rank 598 of 729; 2026-10-08 rank 588 of 731; 2026-10-09 rank 596 of 733; 2026-10-10 rank 597 of 733; 2026-10-11 rank 592 of 725; 2026-10-12 rank 574 of 728; 2026-10-13 rank 565 of 726; 2026-10-14 rank 577 of 727; 2026-10-15 rank 543 of 723; 2026-10-16 rank 540 of 736.ITS RANK IN MARYLAND, DAY BY DAYRANK, FIRST AT THE TOP1200400600800Sep 26Sep 30Oct 4Oct 8Oct 12Oct 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, 202654073651.6%
Oct 15, 202654372351.6%
Oct 14, 202657772751.3%
Oct 13, 202656572651.1%
Oct 12, 202657472850.5%
Oct 11, 202659272549.5%
Oct 10, 202659773350.1%
Oct 9, 202659673350.1%
Oct 8, 202658873150.0%
Oct 7, 202659872950.2%
Oct 6, 202660470250.4%
Oct 5, 202658368650.4%
Oct 4, 202650756450.8%
Oct 3, 202648454050.9%
Oct 2, 202648554050.8%
Oct 1, 202638142650.9%
Sep 30, 202637842451.5%
Sep 29, 202638142451.9%
Sep 28, 202637041852.6%
Sep 27, 202631440278.1%
Sep 26, 202632839976.5%
Reports received at Unnamed Tributary AT Heritage Glen Dam, reports from 1.0 to 3.0, the latest 1.0, in reports.REPORTS RECEIVEDreports01233 AM6 AM9 AM12 PM3 PM6 PM9 PMOct 16
The readings these charts were drawn from, as a table
HourPrecipitation inReports
Fri 16, 2 AM0.001
Fri 16, 1 AM0.003
Reports received at Unnamed Tributary AT Heritage Glen Dam, reports from 1.0 to 11.0, the latest 1.0, in reports.REPORTS RECEIVEDreports051015Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Fri 16
The readings these charts were drawn from, as a table
HourPrecipitation inReports
Fri 16, 2 AM0.001
Fri 16, 1 AM0.003
Precipitation at Unnamed Tributary AT Heritage Glen Dam, precipitation from 0.00 to 1.32, the latest 0.00, in inches.PRECIPITATIONin0.000.501.001.50Sep 17Sep 22Sep 27Oct 2Oct 7Oct 12
The readings these charts were drawn from, as a table
DayPrecipitation in
Oct 160.00
Oct 150.00
Oct 140.00
Oct 130.00
Oct 120.36
Oct 111.32
Oct 100.00
Oct 90.00
Oct 80.00
Oct 70.00
Oct 60.00
Oct 50.00
Oct 40.16
Oct 30.32
Oct 20.35
Oct 10.00
Sep 300.00
Sep 290.00
Sep 280.00
Sep 270.20
Sep 260.44
Sep 250.00
Sep 240.00
Sep 230.44
Sep 220.84
Sep 210.20
Sep 200.00
Sep 190.00
Sep 180.00
Sep 170.04

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 Unnamed Tributary AT Heritage Glen Dam

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