Storm Station

Beside a road

RWIS network, identified by the register

Identifier
CF139
Latitude
34.35956 N
Longitude
117.62932 W
Elevation
5,921 ft
Rank
3,992of 4,072 in California, Oct 4
Road surface
dry
Air temperature
44.2F
Dew point
32.8F
Relative humidity
64%
Wind
3mph
Gust
4mph
Wind direction
284°
Pavement temperature
55.2F
Freezing point of the water on the road
32F

Beside a road

Drawn as the kind of place it stands at. 136 instruments in California stand at one.

Station report

SR-2 - Wrightwood Fire Station, 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 5,921 ft above sea level, 20 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 24.05 inHg and the temperature at 37.9 F.

Section from sea level of where SR-2 - Wrightwood Fire Station stands in the atmosphere, height to scale: the station 5,921 feet above sea level with 20 per cent of the air below it; the standard atmosphere's pressure there, 24.05 inches of mercury, and temperature, 37.9 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF139FIG. D WHERE SR-2 - WRIGHTWOOD FIRE STATION 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 ATMOSPHERESR-2 - WRIGHTWOOD FIRE STATION20 PER CENT OF THE AIR BELOW IT5,921 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 HERE24.05 inHgSTANDARD TEMPERATURE HERE37.9 FTITLESR-2 - Wrightwood Fire Station, the columnSTATION REPORT · RWIS CF139TYPESECTIONSCALEHEIGHT TO SCALEREVFROM THE REGISTER SHEET 1 of 3DATE2026-10-04IDSR-CF139-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

From the Field Book

2The sun

Contents

On Oct 4 the noon sun stands 51 degrees above the horizon at 34.36 N, and the day is 11 h 35 min long. Level ground there takes 78 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at SR-2 - Wrightwood Fire Station, angles true: on Oct 4 it stands 51 degrees above the horizon, against 79 at the June solstice, 56 at the equinoxes and 32 at the December solstice; the day is 11 h 35 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF139FIG. E THE SUN AT SR-2 - WRIGHTWOOD FIRE STATIONELEVATION 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 79°EQUINOXES 56°DECEMBER SOLSTICE 32°OCT 4, 51°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 11 H 35 MINLEVEL GROUND TAKES 78 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 34.36 N; THE SUN'S DECLINATION -4.6°TITLESR-2 - Wrightwood Fire Station, the sunSTATION REPORT · RWIS CF139TYPEELEVATIONSCALEANGLES TRUEREVFROM THE REGISTER SHEET 2 of 3DATE2026-10-04IDSR-CF139-2DRAWN AS linework on paperSOURCES FB-ENG-007

From the Field Book

3The instrument

Contents

A road weather station, 5,921 ft above sea level. Its sensors, as its network builds them.

Elevation of a road weather station, SR-2 - Wrightwood Fire Station, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CF139FIG. 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 SCALETITLESR-2 - Wrightwood Fire Station, the instrumentSTATION REPORT · RWIS CF139TYPEELEVATIONSCALESCHEMATICREVFROM THE REGISTER SHEET 3 of 3DATE2026-10-04IDSR-CF139-3DRAWN AS linework on paperSOURCES FB-INS-001

From the Field Book

What this instrument measures for

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

Near SR-2 - Wrightwood Fire Station