Storm Station

At a lighthouse

DCP network, identified by the register

Identifier
NDBC-SVNM4
Latitude
42.40100 N
Longitude
86.28800 W
Elevation
-
Rank
931of 976 in Michigan, Oct 11
Observed
12:40 AMEDT, 1 hour ago
Air temperature
63.9F
Wind
11mph
Gust
13mph
Wind direction
110°

Ranking Statistics

On the radar over South Haven Light, South HavenReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

At a lighthouse

Drawn as the kind of place it stands at. 5 instruments in Michigan stand at one.

Station charts

South Haven Light, South Haven Report

Rank 931 of 976 in Michigan, Oct 11. 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 score62.7of 100

Michigan median
94.8the median score of 976 stations
Scoring higher
924stations in Michigan
Sharing its score
7ranks 925 to 931
Points deducted
37.331.3 reports received, 4.6 arrival, 0.9 continuity, 0.4 forecast check, 0.2 accuracy
Counted at the median
Forecast checknot measured at this station; Michigan median 96.1
Next above
GW5777rank 930; ahead on reports received 18.8% against 10.7%
Next below
GW0672rank 932; behind on 247 score 62.7 against 62.6

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 3510.73.7 of 35 pointsMichigan median 97.054 of 504 scheduled reports received in 7 days
  2. Arrivalweight 1054.15.4 of 10 pointsMichigan median 99.9half its reports arrived within 33 min
  3. Continuityweight 1090.99.1 of 10 pointsMichigan median 100.0longest silence 80 min, on a schedule of one report every 20 min
  4. Accuracyweight 2099.019.8 of 20 pointsMichigan median 100.0its temperature against the airport station KLWA, 4.0 miles away, over 72 readings: typical difference 2.0 °F beyond a steady offset of +0.9 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsMichigan median 100.00 of 72 readings failed their check against its reference station
  6. Forecast checkweight 10-9.6 of 10 points, at the medianMichigan median 96.1-

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 (60 min), none for 72 (24 h)
Accuracy
Full marks within 1.9 °F of its reference, typically, none beyond 8.4 °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
931of 976 in Michigan, Oct 11
Schedule
every 20 minon the hour's :20, :40 and :50
Reports received, 24 hours
48 of 7266.6% of its schedule, 55 reports in all
Reports received, 7 days
65 of 50412.8% of its schedule, 84 reports in all
Days reported, 30 days
-
Longest silence, 7 days
80 minfrom Oct 10, 7:50 AM
Latest report
Oct 11, 4:40 AMlocal time
Time to reach Storm Station
33 min9 in 10 within 43 min
Against its reference, 30 days
+0.9 °Fwarmer than the airport station KLWA, 4.0 miles away, on average over 83 readings; typical difference 2.1 °F

From Storm Station's own record of every report it heard from this station.

Against its reference: each temperature this station reports is compared with the nearest airport or climate reference station that reported within half an hour, up to 15 miles away. The figure is its reading less the reference's, on average, as both were reported; the typical difference is the root mean square. The difference in height is shown where both heights are known.

Its schedule is one report every 20 min, 72 in 24 hours. Two reports in the same 20 min count as one received.

Chart of the 976 ranked stations in Michigan on Oct 11 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, 49; 20 to 29 per cent, 13; 30 to 39 per cent, 6; 40 to 49 per cent, 80; 50 to 59 per cent, 114; 60 to 69 per cent, 9; 70 to 79 per cent, 65; 80 to 89 per cent, 86; 90 to 99 per cent, 306; 100 per cent, 245. South Haven Light, South Haven received 10.7 per cent, 54 of 504 scheduled reports, rank 931 of 976.WHERE IT RANKS IN MICHIGAN, Oct 11THIS ONE: 10.7%, 54 OF 504, RANK 931 OF 976PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9310 to 194920 to 291330 to 39640 to 498050 to 5911460 to 69970 to 796580 to 898690 to 99306100245STATIONS, LOG SCALE
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%245
90 to 99%306
80 to 89%86
70 to 79%65
60 to 69%9
50 to 59%114
40 to 49%80
30 to 39%6
20 to 29%13
10 to 19%49
0 to 9%3

Station report

South Haven Light, South Haven, 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 11 the noon sun stands 40 degrees above the horizon at 42.40 N, and the day is 11 h 07 min long. Level ground there takes 65 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at South Haven Light, South Haven, angles true: on Oct 11 it stands 40 degrees above the horizon, against 71 at the June solstice, 48 at the equinoxes and 24 at the December solstice; the day is 11 h 07 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-SVNM4FIG. E THE SUN AT SOUTH HAVEN LIGHT, SOUTH HAVENELEVATION 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 71°EQUINOXES 48°DECEMBER SOLSTICE 24°OCT 11, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 07 MINLEVEL GROUND TAKES 65 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 42.40 N; THE SUN'S DECLINATION -7.2°TITLESouth Haven Light, South Haven, the sunSTATION REPORT · DCP NDBC-SVNM4TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 1 of 2DATE2026-10-11IDSR-NDBCSVNM4-1DRAWN 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, South Haven Light, South Haven, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NDBC-SVNM4FIG. 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 SCALETITLESouth Haven Light, South Haven, the instrumentSTATION REPORT · DCP NDBC-SVNM4TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 2 of 2DATE2026-10-11IDSR-NDBCSVNM4-2DRAWN 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

What this instrument measures for

1 place reads it as one of the nearest to it.

Near South Haven Light, South Haven

Gauges

Weather instruments

Places