Storm Station
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Beside a road

RWIS network, identified by the register

Identifier
VTLDW
Latitude
43.35500 N
Longitude
72.75340 W
Elevation
2,227 ft
Rank
307of 354 in Vermont, Oct 16
Observed
12:10 AMEDT, 23 minutes ago
Road surface
dry
Air temperature
44.6F
Dew point
29F
Relative humidity
54%
Wind
1mph
Gust
4mph
Wind direction
138°
Pavement temperature
48.6F

Ranking Statistics

On the radar over Rt 100 - LudlowReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

Beside a road

Drawn as the kind of place it stands at. 56 instruments in Vermont stand at one.

Station charts

Rt 100 - Ludlow Report

Rank 307 of 354 in Vermont, 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 score77.8of 100

Vermont median
93.3the median score of 354 stations
Scoring higher
306stations in Vermont
Sharing its score
1no other station
Points deducted
22.27.5 reports received, 6.4 accuracy, 4.9 continuity, 1.9 arrival, 1.5 forecast check
Counted at the median
Forecast checknot measured at this station; Vermont median 84.8
Next above
VT-CH-65rank 306; ahead on 247 score 77.9 against 77.8
Next below
VTSBLrank 308; behind on 247 score 77.8 against 77.5

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 3578.527.5 of 35 pointsVermont median 85.7791 of 1,008 scheduled reports received in 7 days
  2. Arrivalweight 1081.28.1 of 10 pointsVermont median 100.0half its reports arrived within 19 min
  3. Continuityweight 1051.55.2 of 10 pointsVermont median 100.0longest silence 2.3 h, on a schedule of one report every 10 min
  4. Accuracyweight 2068.013.6 of 20 pointsVermont median 99.2its temperature against the airport station KVSF, 11.7 miles away, over 691 readings: typical difference 4.8 °F beyond a steady offset of -3.0 °F
  5. Instrument checksweight 15100.015.0 of 15 pointsVermont median 100.00 of 691 readings failed their check against its reference station
  6. Forecast checkweight 10-8.5 of 10 points, at the medianVermont median 84.8-

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
307of 354 in Vermont, Oct 16
Days reported, 30 days
0 of 30
Time to reach Storm Station
19 min9 in 10 within 24 min
Against its reference, 30 days
-3.2 °Fcooler than the airport station KVSF, 12 miles away, on average over 1,015 readings; typical difference 5.9 °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: 791 of 1,008 scheduled reports received, 78.4%.

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 354 ranked stations in Vermont 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, 2; 10 to 19 per cent, 3; 20 to 29 per cent, 6; 30 to 39 per cent, 0; 40 to 49 per cent, 18; 50 to 59 per cent, 63; 60 to 69 per cent, 32; 70 to 79 per cent, 27; 80 to 89 per cent, 36; 90 to 99 per cent, 51; 100 per cent, 116. Rt 100 - Ludlow received 78.4 per cent, 791 of 1,008 scheduled reports, rank 307 of 354.WHERE IT RANKS IN VERMONT, Oct 16THIS ONE: 78.4%, 791 OF 1,008, RANK 307 OF 354PER CENT OF SCHEDULED REPORTS RECEIVEDIN STORM STATION'S OWN RECORD, UP TO 7 DAYS1101000 to 9210 to 19320 to 29630 to 3940 to 491850 to 596360 to 693270 to 792780 to 893690 to 9951100116STATIONS, LOG SCALE
Chart of Rt 100 - Ludlow's rank in Vermont by how it reported, day by day, from 2026-10-06 to 2026-10-16: 2026-10-06 rank 350 of 351; 2026-10-07 rank 345 of 349; 2026-10-08 rank 345 of 347; 2026-10-09 rank 319 of 345; 2026-10-10 rank 318 of 345; 2026-10-11 rank 309 of 345; 2026-10-12 rank 275 of 344; 2026-10-13 rank 244 of 351; 2026-10-14 rank 331 of 351; 2026-10-15 rank 337 of 358; 2026-10-16 rank 307 of 354.ITS RANK IN VERMONT, 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%116
90 to 99%51
80 to 89%36
70 to 79%27
60 to 69%32
50 to 59%63
40 to 49%18
30 to 39%0
20 to 29%6
10 to 19%3
0 to 9%2
DayRankStations rankedShare received
Oct 16, 202630735478.4%
Oct 15, 202633735867.2%
Oct 14, 202633135166.1%
Oct 13, 202624435194.9%
Oct 12, 202627534486.9%
Oct 11, 202630934572.9%
Oct 10, 202631834561.1%
Oct 9, 202631934560.7%
Oct 8, 202634534733.1%
Oct 7, 202634534920.3%
Oct 6, 20263503517.2%

Station report

Rt 100 - Ludlow, 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 2,227 ft above sea level, 8 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 27.59 inHg and the temperature at 51.1 F.

Section from sea level of where Rt 100 - Ludlow stands in the atmosphere, height to scale: the station 2,227 feet above sea level with 8 per cent of the air below it; the standard atmosphere's pressure there, 27.59 inches of mercury, and temperature, 51.1 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VTLDWFIG. D WHERE RT 100 - LUDLOW 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 ATMOSPHERERT 100 - LUDLOW8 PER CENT OF THE AIR BELOW IT2,227 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 HERE27.59 inHgSTANDARD TEMPERATURE HERE51.1 FTITLERt 100 - Ludlow, the columnSTATION REPORT · RWIS VTLDWTYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-16IDSR-VTLDW-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 43.35 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 Rt 100 - Ludlow, 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 VTLDWFIG. E THE SUN AT RT 100 - LUDLOWELEVATION 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 43.35 N; THE SUN'S DECLINATION -9.1°TITLERt 100 - Ludlow, the sunSTATION REPORT · RWIS VTLDWTYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-16IDSR-VTLDW-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 2,227 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, Rt 100 - Ludlow, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VTLDWFIG. 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 SCALETITLERt 100 - Ludlow, the instrumentSTATION REPORT · RWIS VTLDWTYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-16IDSR-VTLDW-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

What this instrument measures for

2 places read it as one of the nearest to it.

Near Rt 100 - Ludlow

Gauges

Weather instruments

Places