Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
VTRCK
Latitude
43.18167 N
Longitude
72.46306 W
Elevation
482 ft
Rank
257of 385 in New Hampshire, Oct 16
Observed
1:05 AMEDT, 28 minutes ago
Road surface
dry
Air temperature
40.3F
Dew point
38.7F
Relative humidity
94%
Wind
1mph
Gust
3mph
Wind direction
255°
Pavement temperature
47.7F

Ranking Statistics

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 257 of 385 in New Hampshire, 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 score80.1of 100

New Hampshire median
92.0the median score of 385 stations
Scoring higher
256stations in New Hampshire
Sharing its score
1no other station
Points deducted
19.910.8 reports received, 5.0 continuity, 2.4 forecast check, 1.8 arrival
Counted at the median
Forecast checknot measured at this station; New Hampshire median 76.1
Next above
FW9817rank 256; ahead on 247 score 80.3 against 80.1
Next below
EW5711rank 258; behind on 247 score 80.1 against 80.0

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 3569.224.2 of 35 pointsNew Hampshire median 94.3698 of 1,008 scheduled reports received in 7 days
  2. Arrivalweight 1081.98.2 of 10 pointsNew Hampshire median 100.0half its reports arrived within 19 min
  3. Continuityweight 1050.45.0 of 10 pointsNew Hampshire median 100.0longest silence 2.4 h, on a schedule of one report every 10 min
  4. Accuracyweight 20100.020.0 of 20 pointsNew Hampshire median 98.9its temperature against the airport station KVSF, 11.5 miles away, over 668 readings: typical difference 1.6 °F beyond a steady offset of +0.7 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsNew Hampshire median 100.00 of 668 readings failed their check against its reference station
  6. Forecast checkweight 10-7.6 of 10 points, at the medianNew Hampshire median 76.1-

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 2.7 °F of its reference, typically, none beyond 9.2 °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
257of 385 in New Hampshire, Oct 16
Days reported, 30 days
0 of 30
Time to reach Storm Station
15 min9 in 10 within 24 min
Against its reference, 30 days
+0.9 °Fwarmer than the airport station KVSF, 12 miles away, on average over 987 readings; typical difference 2.0 °F

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: 698 of 1,008 scheduled reports received, 69.2%.

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.

Chart of the 385 ranked stations in New Hampshire 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, 1; 20 to 29 per cent, 14; 30 to 39 per cent, 1; 40 to 49 per cent, 28; 50 to 59 per cent, 82; 60 to 69 per cent, 12; 70 to 79 per cent, 16; 80 to 89 per cent, 31; 90 to 99 per cent, 82; 100 per cent, 114. I-91 Rockingham received 69.2 per cent, 698 of 1,008 scheduled reports, rank 257 of 385.WHERE IT RANKS IN NEW HAMPSHIRE, Oct 16THIS ONE: 69.2%, 698 OF 1,008, RANK 257 OF 385PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9410 to 19120 to 291430 to 39140 to 492850 to 598260 to 691270 to 791680 to 893190 to 9982100114STATIONS, LOG SCALE
Chart of I-91 Rockingham's rank in New Hampshire by how it reported, day by day, from 2026-10-06 to 2026-10-16: 2026-10-06 rank 397 of 401; 2026-10-07 rank 369 of 398; 2026-10-08 rank 371 of 400; 2026-10-09 rank 358 of 406; 2026-10-10 rank 358 of 406; 2026-10-11 rank 328 of 403; 2026-10-12 rank 294 of 401; 2026-10-13 rank 275 of 404; 2026-10-14 rank 270 of 383; 2026-10-15 rank 260 of 388; 2026-10-16 rank 257 of 385.ITS RANK IN NEW HAMPSHIRE, DAY BY DAYRANK, FIRST AT THE TOP1100200300400Oct 6Oct 8Oct 10Oct 12Oct 14Oct 16
The ranking these charts were drawn from, as tables
Share of scheduled reports receivedStations
100%114
90 to 99%82
80 to 89%31
70 to 79%16
60 to 69%12
50 to 59%82
40 to 49%28
30 to 39%1
20 to 29%14
10 to 19%1
0 to 9%4
DayRankStations rankedShare received
Oct 16, 202625738569.2%
Oct 15, 202626038868.6%
Oct 14, 202627038367.3%
Oct 13, 202627540466.2%
Oct 12, 202629440160.5%
Oct 11, 202632840350.7%
Oct 10, 202635840642.3%
Oct 9, 202635840642.0%
Oct 8, 202637140023.3%
Oct 7, 202636939820.2%
Oct 6, 20263974014.9%

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 3DATE2026-10-16IDSR-VTRCK-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 38 degrees above the horizon at 43.18 N, and the day is 10 h 51 min long. Level ground there takes 61 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 16 it stands 38 degrees above the horizon, against 70 at the June solstice, 47 at the equinoxes and 23 at the December solstice; the day is 10 h 51 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 16, 38°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 51 MINLEVEL GROUND TAKES 61 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 43.18 N; THE SUN'S DECLINATION -9.1°TITLEI-91 Rockingham, the sunSTATION REPORT · RWIS VTRCKTYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-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 3DATE2026-10-16IDSR-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

Gauges

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