Storm Station
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At a river or reservoir gauge

DCP network, identified by the register

Identifier
03078000
Latitude
39.70219 N
Longitude
79.13639 W
Elevation
2,089 ft
Rank
206of 736 in Maryland, Oct 16
Observed
10:30 PMEDT, 1 hour ago
Precipitation in the gauge's latest reading
0in

Ranking Statistics

On the radar over Casselman River At GrantsvilleReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a river or reservoir gauge

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

Station charts

Casselman River At Grantsville Report

Rank 206 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 score96.5of 100

Maryland median
89.0the median score of 736 stations
Scoring higher
204stations in Maryland
Sharing its score
4ranks 205 to 208
Points deducted
3.52.6 arrival, 0.8 forecast check, 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
GNTM2rank 205; ahead on median arrival 22 min 36 s against 22 min 48 s
Next below
DELM2rank 207; behind on reports received 100% against 98.8%

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 35100.035.0 of 35 pointsMaryland median 82.1168 of 168 scheduled reports received in 7 days
  2. Arrivalweight 1074.47.4 of 10 pointsMaryland median 94.0half its reports arrived within 23 min
  3. Continuityweight 10100.010.0 of 10 pointsMaryland median 100.0longest silence 60 min, on a schedule of one report every 60 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 (3 h), none for 72 (72 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
206of 736 in Maryland, Oct 16
Schedule
every houron the hour's :30
Reports received, 24 hours
24 of 24100% of its schedule
Reports received, 7 days
168 of 168100% of its schedule, 183 reports in all
Days reported, 30 days
-
Longest silence, 7 days
73 minfrom Oct 16, 2:30 AM
Latest report
Oct 16, 2:30 AMlocal time
Time to reach Storm Station
23 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 hour, 24 in 24 hours. Two reports in the same hour 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. Casselman River At Grantsville received 100.0 per cent, 168 of 168 scheduled reports, rank 206 of 736.WHERE IT RANKS IN MARYLAND, Oct 16THIS ONE: 100.0%, 168 OF 168, RANK 206 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 Casselman River At Grantsville's rank in Maryland by how it reported, day by day, from 2026-10-07 to 2026-10-16: 2026-10-07 rank 676 of 729; 2026-10-08 rank 662 of 731; 2026-10-09 rank 451 of 733; 2026-10-10 rank 449 of 733; 2026-10-11 rank 379 of 725; 2026-10-12 rank 338 of 728; 2026-10-13 rank 185 of 726; 2026-10-14 rank 184 of 727; 2026-10-15 rank 199 of 723; 2026-10-16 rank 206 of 736.ITS RANK IN MARYLAND, DAY BY DAYRANK, FIRST AT THE TOP1200400600800Oct 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, 2026206736100.0%
Oct 15, 2026199723100.0%
Oct 14, 2026184727100.0%
Oct 13, 2026185726100.0%
Oct 12, 202633872886.3%
Oct 11, 202637972572.0%
Oct 10, 202644973357.7%
Oct 9, 202645173357.1%
Oct 8, 202666273129.1%
Oct 7, 202667672914.8%

Station report

Casselman River At Grantsville, 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 2,089 ft above sea level, 7 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 27.73 inHg and the temperature at 51.6 F.

Section from sea level of where Casselman River At Grantsville stands in the atmosphere, height to scale: the station 2,089 feet above sea level with 7 per cent of the air below it; the standard atmosphere's pressure there, 27.73 inches of mercury, and temperature, 51.6 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 03078000FIG. D WHERE CASSELMAN RIVER AT GRANTSVILLE 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 ATMOSPHERECASSELMAN RIVER AT GRANTSVILLE7 PER CENT OF THE AIR BELOW IT2,089 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 HERE27.73 inHgSTANDARD TEMPERATURE HERE51.6 FTITLECasselman River At Grantsville, the columnSTATION REPORT · DCP 03078000TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-16IDSR-03078000-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 16 the noon sun stands 41 degrees above the horizon at 39.70 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 Casselman River At Grantsville, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 50 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 03078000FIG. E THE SUN AT CASSELMAN RIVER AT GRANTSVILLEELEVATION 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 50°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 39.70 N; THE SUN'S DECLINATION -9.1°TITLECasselman River At Grantsville, the sunSTATION REPORT · DCP 03078000TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-03078000-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A data collection platform, 2,089 ft above sea level. Its sensors, as its network builds them.

Elevation of a data collection platform, Casselman River At Grantsville, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 03078000FIG. 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 SCALETITLECasselman River At Grantsville, the instrumentSTATION REPORT · DCP 03078000TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-16IDSR-03078000-3DRAWN 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 Casselman River At Grantsville

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