Storm Station

Beside a road

RWIS network, identified by the register

Identifier
VTRCK
Latitude
43.18167 N
Longitude
72.46306 W
Elevation
482 ft
Rank
397of 401 in New Hampshire, Oct 6
Road surface
dry
Air temperature
42.4F
Dew point
33.7F
Relative humidity
71%
Wind
2mph
Gust
5mph
Wind direction
31°
Pavement temperature
44.6F

On the radar over I-91 RockinghamReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

Beside a road

Drawn as the kind of place it stands at. 28 instruments in New Hampshire stand at one.

Station charts

I-91 Rockingham Report

Rank 397 of 401 in New Hampshire, Oct 6. 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.

247 score53.7of 100

  1. Reports receivedweight 355.050 of 1,008 scheduled reports received in 7 days
  2. Arrivalweight 1081.8half its reports arrived within 19 min
  3. Continuityweight 100.0longest silence 2.4 days, on a schedule of one report every 10 min
  4. Accuracyweight 20100.0its temperature against the airport station KVSF, 11.5 miles away, over 50 readings: typical difference 1.5 °F beyond a steady offset of +0.4 °F
  5. Instrument checksweight 15100.00 of 50 readings failed their check against its reference station
  6. Forecast checkweight 10--

The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.

Rank
397of 401 in New Hampshire, Oct 6
Days reported, 30 days
0 of 30

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: 50 of 1,008 scheduled reports received, 4.9%.

Chart of the 401 ranked stations in New Hampshire on Oct 6 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, 7; 10 to 19 per cent, 15; 20 to 29 per cent, 6; 30 to 39 per cent, 31; 40 to 49 per cent, 35; 50 to 59 per cent, 43; 60 to 69 per cent, 23; 70 to 79 per cent, 10; 80 to 89 per cent, 37; 90 to 99 per cent, 91; 100 per cent, 103. I-91 Rockingham received 4.9 per cent, 50 of 1,008 scheduled reports, rank 397 of 401.WHERE IT RANKS IN NEW HAMPSHIRE, Oct 6THIS ONE: 4.9%, 50 OF 1,008, RANK 397 OF 401PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9710 to 191520 to 29630 to 393140 to 493550 to 594360 to 692370 to 791080 to 893790 to 9991100103STATIONS, LOG SCALE
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%103
90 to 99%91
80 to 89%37
70 to 79%10
60 to 69%23
50 to 59%43
40 to 49%35
30 to 39%31
20 to 29%6
10 to 19%15
0 to 9%7

Station report

I-91 Rockingham, 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 482 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.40 inHg and the temperature at 57.3 F.

Section from sea level of where I-91 Rockingham stands in the atmosphere, height to scale: the station 482 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.40 inches of mercury, and temperature, 57.3 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VTRCKFIG. D WHERE I-91 ROCKINGHAM 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 ATMOSPHEREI-91 ROCKINGHAM2 PER CENT OF THE AIR BELOW IT482 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 HERE29.40 inHgSTANDARD TEMPERATURE HERE57.3 FTITLEI-91 Rockingham, the columnSTATION REPORT · RWIS VTRCKTYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-06IDSR-VTRCK-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 6 the noon sun stands 42 degrees above the horizon at 43.18 N, and the day is 11 h 20 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 I-91 Rockingham, angles true: on Oct 6 it stands 42 degrees above the horizon, against 70 at the June solstice, 47 at the equinoxes and 23 at the December solstice; the day is 11 h 20 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VTRCKFIG. E THE SUN AT I-91 ROCKINGHAMELEVATION 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 70°EQUINOXES 47°DECEMBER SOLSTICE 23°OCT 6, 42°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 20 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 43.18 N; THE SUN'S DECLINATION -5.3°TITLEI-91 Rockingham, the sunSTATION REPORT · RWIS VTRCKTYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-06IDSR-VTRCK-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 482 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, I-91 Rockingham, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VTRCKFIG. F THE INSTRUMENTELEVATION OF A ROAD WEATHER STATION, EACH SENSOR WITH WHAT IT READTHE ROAD, IN SECTIONPAVEMENT SENSOR, SET IN THE ROAD-PROBE UNDER THE ROAD-AIR TEMPERATURE ON THE TOWER-WIND AT THE TOP OF THE TOWER-SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLEI-91 Rockingham, the instrumentSTATION REPORT · RWIS VTRCKTYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-06IDSR-VTRCK-3DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

The instrumentWhat an instrument is FB-INS-001Stevenson screen and siting FB-INS-009

What it seesLapse rates and stability FB-ENG-005Water vapour as a gas FB-ENG-011Blizzard FB-EVT-081Ice storm FB-EVT-084Heat wave and heat dome FB-EVT-130Fire weather FB-EVT-139High wind FB-EVT-150Humidity variables FB-WAT-002Fog types FB-WAT-020

Near I-91 Rockingham

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