Storm Station
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At a river or reservoir gauge

DCP network, identified by the register

Identifier
GRNM2
Latitude
38.98920 N
Longitude
76.84750 W
Elevation
-
Listed
Automatically, on 748 reports in 169 hours over the last seven days
Observed
10:05 PMEDT, 28 minutes ago
Precipitation today
0.2in

Ranking Statistics

At a river or reservoir gauge

Drawn as the kind of place it stands at. 33 instruments in Maryland stand at one.

Station charts

Greenbelt Report

Rank 386 of 742 in Maryland, Oct 17. 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 score89.4of 100

Maryland median
89.5the median score of 742 stations
Scoring higher
385stations in Maryland
Sharing its score
1no other station
Points deducted
10.69.0 reports received, 0.6 arrival, 0.5 continuity, 0.5 forecast check
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Maryland median 100.0, 100.0, 95.1
Next above
MD-WC-9rank 385; ahead on 247 score 89.5 against 89.4
Next below
CXLM2rank 387; behind on 247 score 89.4 against 89.3

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 3574.226.0 of 35 pointsMaryland median 84.4748 of 1,008 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 1095.19.5 of 10 pointsMaryland median 100.0longest silence 35 min, on a schedule of one report every 10 min
  4. Accuracyweight 20-20.0 of 20 points, at the medianMaryland median 100.0-
  5. Instrument checksweight 15-15.0 of 15 points, at the medianMaryland median 100.0-
  6. Forecast checkweight 10-9.5 of 10 points, at the medianMaryland median 95.1-

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 (30 min), none for 72 (12 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
Schedule
every 10 min
Reports received, 24 hours
108 of 14475.0% of its schedule, 120 reports in all
Reports received, 7 days
752 of 1,00874.6% of its schedule, 920 reports in all
Days reported, 30 days
29 of 30
Longest silence, 7 days
35 minfrom Oct 12, 10:25 PM
Latest report
Oct 16, 3:00 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 10 min, 144 in 24 hours. Two reports in the same 10 min count as one received.

Chart of the 742 ranked stations in Maryland on Oct 17 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, 3; 10 to 19 per cent, 38; 20 to 29 per cent, 9; 30 to 39 per cent, 14; 40 to 49 per cent, 48; 50 to 59 per cent, 97; 60 to 69 per cent, 117; 70 to 79 per cent, 35; 80 to 89 per cent, 41; 90 to 99 per cent, 181; 100 per cent, 159. Greenbelt received 74.2 per cent, 748 of 1,008 scheduled reports, rank 386 of 742.WHERE IT RANKS IN MARYLAND, Oct 17THIS ONE: 74.2%, 748 OF 1,008, RANK 386 OF 742PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9310 to 193820 to 29930 to 391440 to 494850 to 599760 to 6911770 to 793580 to 894190 to 99181100159STATIONS, LOG SCALE
Chart of Greenbelt's rank in Maryland by how it reported, day by day, from 2026-09-26 to 2026-10-17: 2026-09-26 rank 301 of 399; 2026-09-27 rank 292 of 402; 2026-09-28 rank 306 of 418; 2026-09-29 rank 305 of 424; 2026-09-30 rank 309 of 424; 2026-10-01 rank 244 of 426; 2026-10-02 rank 438 of 540; 2026-10-03 rank 438 of 540; 2026-10-04 rank 468 of 564; 2026-10-05 rank 433 of 686; 2026-10-06 rank 431 of 702; 2026-10-07 rank 416 of 729; 2026-10-08 rank 407 of 731; 2026-10-09 rank 390 of 733; 2026-10-10 rank 388 of 733; 2026-10-11 rank 402 of 725; 2026-10-12 rank 404 of 728; 2026-10-13 rank 397 of 726; 2026-10-14 rank 391 of 727; 2026-10-15 rank 374 of 723; 2026-10-16 rank 377 of 736; 2026-10-17 rank 386 of 742.ITS RANK IN MARYLAND, DAY BY DAYRANK, FIRST AT THE TOP1200400600Sep 26Sep 30Oct 4Oct 8Oct 12Oct 16Oct 17
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%159
90 to 99%181
80 to 89%41
70 to 79%35
60 to 69%117
50 to 59%97
40 to 49%48
30 to 39%14
20 to 29%9
10 to 19%38
0 to 9%3
DayRankStations rankedShare received
Oct 17, 202638674274.2%
Oct 16, 202637773674.1%
Oct 15, 202637472374.2%
Oct 14, 202639172772.9%
Oct 13, 202639772672.7%
Oct 12, 202640472873.1%
Oct 11, 202640272571.6%
Oct 10, 202638873370.7%
Oct 9, 202639073370.8%
Oct 8, 202640773170.1%
Oct 7, 202641672970.9%
Oct 6, 202643170270.6%
Oct 5, 202643368670.4%
Oct 4, 202646856470.9%
Oct 3, 202643854071.4%
Oct 2, 202643854071.3%
Oct 1, 202624442689.2%
Sep 30, 202630942488.9%
Sep 29, 202630542489.9%
Sep 28, 202630641889.4%
Sep 27, 202629240290.0%
Sep 26, 202630139992.1%
Reports received at Greenbelt, reports from 6.0 to 13.0, the latest 6.0, in reports.REPORTS RECEIVEDreports051015Oct 163 AM6 AM9 AM12 PM3 PM6 PM9 PM
Reports received at Greenbelt, reports from 6.0 to 15.0, the latest 6.0, in reports.REPORTS RECEIVEDreports051015Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Fri 16
Precipitation at Greenbelt, precipitation from 0.00 to 1.27, the latest 0.16, in inches.PRECIPITATIONin0.000.501.001.50Sep 18Sep 23Sep 28Oct 3Oct 8Oct 13
The readings these charts were drawn from, as a table
DayPrecipitation in
Oct 160.16
Oct 150.00
Oct 140.00
Oct 130.04
Oct 120.27
Oct 111.27
Oct 100.00
Oct 90.00
Oct 80.00
Oct 70.00
Oct 60.00
Oct 50.00
Oct 40.15
Oct 30.24
Oct 20.16
Oct 10.00
Sep 300.00
Sep 290.00
Sep 280.00
Sep 270.23
Sep 260.36
Sep 250.00
Sep 240.00
Sep 230.43
Sep 221.18
Sep 210.87
Sep 200.19
Sep 190.00
Sep 180.00

Near Greenbelt