Storm Station
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At a shore station

DCP network, identified by the register

Identifier
NDBC-GRMM4
Latitude
46.68400 N
Longitude
85.97200 W
Elevation
-
Rank
688of 979 in Michigan, Oct 16
Observed
10:50 PMEDT, 2 hours ago
Wind
10mph
Gust
14mph
Wind direction
120°

Ranking Statistics

On the radar over Grand MaraisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a shore station

Drawn as the kind of place it stands at. 4 instruments in Michigan stand at one.

Station charts

Grand Marais Report

Rank 688 of 979 in Michigan, 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 score88.8of 100

Michigan median
95.5the median score of 979 stations
Scoring higher
685stations in Michigan
Sharing its score
3ranks 686 to 688
Points deducted
11.25.6 reports received, 2.6 arrival, 2.3 continuity, 0.8 forecast check
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Michigan median 100.0, 100.0, 92.3
Next above
54810rank 687; ahead on reports received 98.8% against 83.9%
Next below
QNCM4rank 689; behind on 247 score 88.8 against 88.5

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 3583.929.4 of 35 pointsMichigan median 98.2141 of 168 scheduled reports received in 7 days
  2. Arrivalweight 1074.47.4 of 10 pointsMichigan median 96.9half its reports arrived within 23 min
  3. Continuityweight 1077.37.7 of 10 pointsMichigan median 100.0longest silence 6.2 h, on a schedule of one report every 60 min
  4. Accuracyweight 20-20.0 of 20 points, at the medianMichigan median 100.0-
  5. Instrument checksweight 15-15.0 of 15 points, at the medianMichigan median 100.0-
  6. Forecast checkweight 10-9.2 of 10 points, at the medianMichigan median 92.3-

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
688of 979 in Michigan, Oct 16
Schedule
every houron the hour's :50
Reports received, 24 hours
21 of 2487.5% of its schedule
Reports received, 7 days
143 of 16885.1% of its schedule
Days reported, 30 days
-
Longest silence, 7 days
6 h 10 minfrom Oct 13, 3:40 AM
Latest report
Oct 16, 2:50 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 979 ranked stations in Michigan 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, 1; 10 to 19 per cent, 7; 20 to 29 per cent, 23; 30 to 39 per cent, 1; 40 to 49 per cent, 51; 50 to 59 per cent, 128; 60 to 69 per cent, 37; 70 to 79 per cent, 64; 80 to 89 per cent, 94; 90 to 99 per cent, 242; 100 per cent, 331. Grand Marais received 83.9 per cent, 141 of 168 scheduled reports, rank 688 of 979.WHERE IT RANKS IN MICHIGAN, Oct 16THIS ONE: 83.9%, 141 OF 168, RANK 688 OF 979PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9110 to 19720 to 292330 to 39140 to 495150 to 5912860 to 693770 to 796480 to 899490 to 99242100331STATIONS, LOG SCALE
Chart of Grand Marais's rank in Michigan by how it reported, day by day, from 2026-10-11 to 2026-10-16: 2026-10-11 rank 914 of 976; 2026-10-12 rank 899 of 964; 2026-10-13 rank 860 of 961; 2026-10-14 rank 830 of 975; 2026-10-15 rank 739 of 984; 2026-10-16 rank 688 of 979.ITS RANK IN MICHIGAN, DAY BY DAYRANK, FIRST AT THE TOP12505007501,000Oct 11Oct 12Oct 13Oct 14Oct 15Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%331
90 to 99%242
80 to 89%94
70 to 79%64
60 to 69%37
50 to 59%128
40 to 49%51
30 to 39%1
20 to 29%23
10 to 19%7
0 to 9%1
DayRankStations rankedShare received
Oct 16, 202668897983.9%
Oct 15, 202673998469.6%
Oct 14, 202683097555.3%
Oct 13, 202686096144.6%
Oct 12, 202689996430.3%
Oct 11, 202691497616.0%

Station report

Grand Marais, in 2 sheets

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

1The sun

Contents

On Oct 16 the noon sun stands 34 degrees above the horizon at 46.68 N, and the day is 10 h 42 min long. Level ground there takes 56 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Grand Marais, angles true: on Oct 16 it stands 34 degrees above the horizon, against 67 at the June solstice, 43 at the equinoxes and 20 at the December solstice; the day is 10 h 42 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-GRMM4FIG. E THE SUN AT GRAND MARAISELEVATION 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 67°EQUINOXES 43°DECEMBER SOLSTICE 20°OCT 16, 34°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 42 MINLEVEL GROUND TAKES 56 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 46.68 N; THE SUN'S DECLINATION -9.1°TITLEGrand Marais, the sunSTATION REPORT · DCP NDBC-GRMM4TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-16IDSR-NDBCGRMM4-1DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

2The instrument

Contents

A data collection platform. Its sensors, as its network builds them.

Elevation of a data collection platform, Grand Marais, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-GRMM4FIG. 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 SCALETITLEGrand Marais, the instrumentSTATION REPORT · DCP NDBC-GRMM4TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-16IDSR-NDBCGRMM4-2DRAWN 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

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